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64141382ec
check_set_special_type_attr() and type_set_annotations() now check for immutable flag (Py_TPFLAGS_IMMUTABLETYPE). Co-authored-by: Victor Stinner <vstinner@python.org>
5741 lines
192 KiB
Python
5741 lines
192 KiB
Python
import builtins
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import copyreg
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import gc
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import itertools
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import math
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import pickle
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import random
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import string
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import sys
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import types
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import unittest
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import warnings
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import weakref
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from copy import deepcopy
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from test import support
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try:
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import _testcapi
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except ImportError:
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_testcapi = None
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class OperatorsTest(unittest.TestCase):
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def __init__(self, *args, **kwargs):
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unittest.TestCase.__init__(self, *args, **kwargs)
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self.binops = {
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'add': '+',
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'sub': '-',
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'mul': '*',
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'matmul': '@',
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'truediv': '/',
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'floordiv': '//',
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'divmod': 'divmod',
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'pow': '**',
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'lshift': '<<',
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'rshift': '>>',
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'and': '&',
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'xor': '^',
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'or': '|',
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'cmp': 'cmp',
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'lt': '<',
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'le': '<=',
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'eq': '==',
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'ne': '!=',
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'gt': '>',
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'ge': '>=',
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}
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for name, expr in list(self.binops.items()):
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if expr.islower():
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expr = expr + "(a, b)"
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else:
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expr = 'a %s b' % expr
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self.binops[name] = expr
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self.unops = {
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'pos': '+',
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'neg': '-',
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'abs': 'abs',
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'invert': '~',
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'int': 'int',
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'float': 'float',
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}
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for name, expr in list(self.unops.items()):
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if expr.islower():
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expr = expr + "(a)"
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else:
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expr = '%s a' % expr
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self.unops[name] = expr
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def unop_test(self, a, res, expr="len(a)", meth="__len__"):
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d = {'a': a}
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self.assertEqual(eval(expr, d), res)
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t = type(a)
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m = getattr(t, meth)
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# Find method in parent class
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while meth not in t.__dict__:
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t = t.__bases__[0]
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# in some implementations (e.g. PyPy), 'm' can be a regular unbound
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# method object; the getattr() below obtains its underlying function.
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self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
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self.assertEqual(m(a), res)
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bm = getattr(a, meth)
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self.assertEqual(bm(), res)
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def binop_test(self, a, b, res, expr="a+b", meth="__add__"):
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d = {'a': a, 'b': b}
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self.assertEqual(eval(expr, d), res)
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t = type(a)
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m = getattr(t, meth)
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while meth not in t.__dict__:
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t = t.__bases__[0]
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# in some implementations (e.g. PyPy), 'm' can be a regular unbound
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# method object; the getattr() below obtains its underlying function.
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self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
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self.assertEqual(m(a, b), res)
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bm = getattr(a, meth)
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self.assertEqual(bm(b), res)
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def sliceop_test(self, a, b, c, res, expr="a[b:c]", meth="__getitem__"):
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d = {'a': a, 'b': b, 'c': c}
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self.assertEqual(eval(expr, d), res)
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t = type(a)
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m = getattr(t, meth)
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while meth not in t.__dict__:
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t = t.__bases__[0]
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# in some implementations (e.g. PyPy), 'm' can be a regular unbound
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# method object; the getattr() below obtains its underlying function.
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self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
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self.assertEqual(m(a, slice(b, c)), res)
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bm = getattr(a, meth)
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self.assertEqual(bm(slice(b, c)), res)
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def setop_test(self, a, b, res, stmt="a+=b", meth="__iadd__"):
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d = {'a': deepcopy(a), 'b': b}
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exec(stmt, d)
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self.assertEqual(d['a'], res)
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t = type(a)
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m = getattr(t, meth)
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while meth not in t.__dict__:
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t = t.__bases__[0]
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# in some implementations (e.g. PyPy), 'm' can be a regular unbound
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# method object; the getattr() below obtains its underlying function.
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self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
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d['a'] = deepcopy(a)
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m(d['a'], b)
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self.assertEqual(d['a'], res)
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d['a'] = deepcopy(a)
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bm = getattr(d['a'], meth)
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bm(b)
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self.assertEqual(d['a'], res)
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def set2op_test(self, a, b, c, res, stmt="a[b]=c", meth="__setitem__"):
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d = {'a': deepcopy(a), 'b': b, 'c': c}
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exec(stmt, d)
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self.assertEqual(d['a'], res)
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t = type(a)
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m = getattr(t, meth)
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while meth not in t.__dict__:
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t = t.__bases__[0]
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# in some implementations (e.g. PyPy), 'm' can be a regular unbound
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# method object; the getattr() below obtains its underlying function.
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self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
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d['a'] = deepcopy(a)
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m(d['a'], b, c)
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self.assertEqual(d['a'], res)
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d['a'] = deepcopy(a)
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bm = getattr(d['a'], meth)
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bm(b, c)
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self.assertEqual(d['a'], res)
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def setsliceop_test(self, a, b, c, d, res, stmt="a[b:c]=d", meth="__setitem__"):
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dictionary = {'a': deepcopy(a), 'b': b, 'c': c, 'd': d}
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exec(stmt, dictionary)
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self.assertEqual(dictionary['a'], res)
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t = type(a)
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while meth not in t.__dict__:
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t = t.__bases__[0]
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m = getattr(t, meth)
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# in some implementations (e.g. PyPy), 'm' can be a regular unbound
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# method object; the getattr() below obtains its underlying function.
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self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth])
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dictionary['a'] = deepcopy(a)
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m(dictionary['a'], slice(b, c), d)
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self.assertEqual(dictionary['a'], res)
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dictionary['a'] = deepcopy(a)
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bm = getattr(dictionary['a'], meth)
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bm(slice(b, c), d)
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self.assertEqual(dictionary['a'], res)
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def test_lists(self):
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# Testing list operations...
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# Asserts are within individual test methods
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self.binop_test([1], [2], [1,2], "a+b", "__add__")
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self.binop_test([1,2,3], 2, 1, "b in a", "__contains__")
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self.binop_test([1,2,3], 4, 0, "b in a", "__contains__")
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self.binop_test([1,2,3], 1, 2, "a[b]", "__getitem__")
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self.sliceop_test([1,2,3], 0, 2, [1,2], "a[b:c]", "__getitem__")
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self.setop_test([1], [2], [1,2], "a+=b", "__iadd__")
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self.setop_test([1,2], 3, [1,2,1,2,1,2], "a*=b", "__imul__")
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self.unop_test([1,2,3], 3, "len(a)", "__len__")
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self.binop_test([1,2], 3, [1,2,1,2,1,2], "a*b", "__mul__")
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self.binop_test([1,2], 3, [1,2,1,2,1,2], "b*a", "__rmul__")
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self.set2op_test([1,2], 1, 3, [1,3], "a[b]=c", "__setitem__")
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self.setsliceop_test([1,2,3,4], 1, 3, [5,6], [1,5,6,4], "a[b:c]=d",
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"__setitem__")
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def test_dicts(self):
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# Testing dict operations...
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self.binop_test({1:2,3:4}, 1, 1, "b in a", "__contains__")
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self.binop_test({1:2,3:4}, 2, 0, "b in a", "__contains__")
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self.binop_test({1:2,3:4}, 1, 2, "a[b]", "__getitem__")
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d = {1:2, 3:4}
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l1 = []
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for i in list(d.keys()):
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l1.append(i)
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l = []
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for i in iter(d):
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l.append(i)
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self.assertEqual(l, l1)
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l = []
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for i in d.__iter__():
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l.append(i)
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self.assertEqual(l, l1)
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l = []
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for i in dict.__iter__(d):
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l.append(i)
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self.assertEqual(l, l1)
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d = {1:2, 3:4}
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self.unop_test(d, 2, "len(a)", "__len__")
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self.assertEqual(eval(repr(d), {}), d)
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self.assertEqual(eval(d.__repr__(), {}), d)
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self.set2op_test({1:2,3:4}, 2, 3, {1:2,2:3,3:4}, "a[b]=c",
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"__setitem__")
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# Tests for unary and binary operators
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def number_operators(self, a, b, skip=[]):
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dict = {'a': a, 'b': b}
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for name, expr in self.binops.items():
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if name not in skip:
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name = "__%s__" % name
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if hasattr(a, name):
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res = eval(expr, dict)
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self.binop_test(a, b, res, expr, name)
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for name, expr in list(self.unops.items()):
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if name not in skip:
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name = "__%s__" % name
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if hasattr(a, name):
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res = eval(expr, dict)
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self.unop_test(a, res, expr, name)
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def test_ints(self):
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# Testing int operations...
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self.number_operators(100, 3)
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# The following crashes in Python 2.2
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self.assertEqual((1).__bool__(), 1)
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self.assertEqual((0).__bool__(), 0)
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# This returns 'NotImplemented' in Python 2.2
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class C(int):
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def __add__(self, other):
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return NotImplemented
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self.assertEqual(C(5), 5)
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try:
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C() + ""
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except TypeError:
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pass
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else:
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self.fail("NotImplemented should have caused TypeError")
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def test_floats(self):
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# Testing float operations...
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self.number_operators(100.0, 3.0)
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def test_complexes(self):
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# Testing complex operations...
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self.number_operators(100.0j, 3.0j, skip=['lt', 'le', 'gt', 'ge',
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'int', 'float',
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'floordiv', 'divmod', 'mod'])
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class Number(complex):
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__slots__ = ['prec']
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def __new__(cls, *args, **kwds):
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result = complex.__new__(cls, *args)
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result.prec = kwds.get('prec', 12)
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return result
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def __repr__(self):
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prec = self.prec
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if self.imag == 0.0:
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return "%.*g" % (prec, self.real)
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if self.real == 0.0:
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return "%.*gj" % (prec, self.imag)
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return "(%.*g+%.*gj)" % (prec, self.real, prec, self.imag)
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__str__ = __repr__
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a = Number(3.14, prec=6)
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self.assertEqual(repr(a), "3.14")
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self.assertEqual(a.prec, 6)
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a = Number(a, prec=2)
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self.assertEqual(repr(a), "3.1")
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self.assertEqual(a.prec, 2)
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a = Number(234.5)
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self.assertEqual(repr(a), "234.5")
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self.assertEqual(a.prec, 12)
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def test_explicit_reverse_methods(self):
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# see issue 9930
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self.assertEqual(complex.__radd__(3j, 4.0), complex(4.0, 3.0))
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self.assertEqual(float.__rsub__(3.0, 1), -2.0)
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@support.impl_detail("the module 'xxsubtype' is internal")
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def test_spam_lists(self):
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# Testing spamlist operations...
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import copy, xxsubtype as spam
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def spamlist(l, memo=None):
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import xxsubtype as spam
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return spam.spamlist(l)
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# This is an ugly hack:
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copy._deepcopy_dispatch[spam.spamlist] = spamlist
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self.binop_test(spamlist([1]), spamlist([2]), spamlist([1,2]), "a+b",
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"__add__")
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self.binop_test(spamlist([1,2,3]), 2, 1, "b in a", "__contains__")
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self.binop_test(spamlist([1,2,3]), 4, 0, "b in a", "__contains__")
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self.binop_test(spamlist([1,2,3]), 1, 2, "a[b]", "__getitem__")
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self.sliceop_test(spamlist([1,2,3]), 0, 2, spamlist([1,2]), "a[b:c]",
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"__getitem__")
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self.setop_test(spamlist([1]), spamlist([2]), spamlist([1,2]), "a+=b",
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"__iadd__")
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self.setop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*=b",
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"__imul__")
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self.unop_test(spamlist([1,2,3]), 3, "len(a)", "__len__")
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self.binop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*b",
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"__mul__")
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self.binop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "b*a",
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"__rmul__")
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self.set2op_test(spamlist([1,2]), 1, 3, spamlist([1,3]), "a[b]=c",
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"__setitem__")
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self.setsliceop_test(spamlist([1,2,3,4]), 1, 3, spamlist([5,6]),
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spamlist([1,5,6,4]), "a[b:c]=d", "__setitem__")
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# Test subclassing
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class C(spam.spamlist):
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def foo(self): return 1
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a = C()
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self.assertEqual(a, [])
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self.assertEqual(a.foo(), 1)
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a.append(100)
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self.assertEqual(a, [100])
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self.assertEqual(a.getstate(), 0)
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a.setstate(42)
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self.assertEqual(a.getstate(), 42)
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@support.impl_detail("the module 'xxsubtype' is internal")
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def test_spam_dicts(self):
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# Testing spamdict operations...
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import copy, xxsubtype as spam
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def spamdict(d, memo=None):
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import xxsubtype as spam
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sd = spam.spamdict()
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for k, v in list(d.items()):
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sd[k] = v
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return sd
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# This is an ugly hack:
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copy._deepcopy_dispatch[spam.spamdict] = spamdict
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self.binop_test(spamdict({1:2,3:4}), 1, 1, "b in a", "__contains__")
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self.binop_test(spamdict({1:2,3:4}), 2, 0, "b in a", "__contains__")
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self.binop_test(spamdict({1:2,3:4}), 1, 2, "a[b]", "__getitem__")
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d = spamdict({1:2,3:4})
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l1 = []
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for i in list(d.keys()):
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l1.append(i)
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l = []
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for i in iter(d):
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l.append(i)
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self.assertEqual(l, l1)
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l = []
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for i in d.__iter__():
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l.append(i)
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self.assertEqual(l, l1)
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l = []
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for i in type(spamdict({})).__iter__(d):
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l.append(i)
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self.assertEqual(l, l1)
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straightd = {1:2, 3:4}
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spamd = spamdict(straightd)
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self.unop_test(spamd, 2, "len(a)", "__len__")
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self.unop_test(spamd, repr(straightd), "repr(a)", "__repr__")
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self.set2op_test(spamdict({1:2,3:4}), 2, 3, spamdict({1:2,2:3,3:4}),
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"a[b]=c", "__setitem__")
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# Test subclassing
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class C(spam.spamdict):
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def foo(self): return 1
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a = C()
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self.assertEqual(list(a.items()), [])
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self.assertEqual(a.foo(), 1)
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a['foo'] = 'bar'
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self.assertEqual(list(a.items()), [('foo', 'bar')])
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self.assertEqual(a.getstate(), 0)
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a.setstate(100)
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self.assertEqual(a.getstate(), 100)
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def test_wrap_lenfunc_bad_cast(self):
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self.assertEqual(range(sys.maxsize).__len__(), sys.maxsize)
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class ClassPropertiesAndMethods(unittest.TestCase):
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def assertHasAttr(self, obj, name):
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self.assertTrue(hasattr(obj, name),
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'%r has no attribute %r' % (obj, name))
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def assertNotHasAttr(self, obj, name):
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self.assertFalse(hasattr(obj, name),
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'%r has unexpected attribute %r' % (obj, name))
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def test_python_dicts(self):
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# Testing Python subclass of dict...
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self.assertTrue(issubclass(dict, dict))
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self.assertIsInstance({}, dict)
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d = dict()
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self.assertEqual(d, {})
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self.assertIs(d.__class__, dict)
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self.assertIsInstance(d, dict)
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class C(dict):
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state = -1
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def __init__(self_local, *a, **kw):
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if a:
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self.assertEqual(len(a), 1)
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self_local.state = a[0]
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if kw:
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for k, v in list(kw.items()):
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self_local[v] = k
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def __getitem__(self, key):
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return self.get(key, 0)
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def __setitem__(self_local, key, value):
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self.assertIsInstance(key, type(0))
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dict.__setitem__(self_local, key, value)
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def setstate(self, state):
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self.state = state
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def getstate(self):
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return self.state
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self.assertTrue(issubclass(C, dict))
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a1 = C(12)
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self.assertEqual(a1.state, 12)
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a2 = C(foo=1, bar=2)
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self.assertEqual(a2[1] == 'foo' and a2[2], 'bar')
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a = C()
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self.assertEqual(a.state, -1)
|
|
self.assertEqual(a.getstate(), -1)
|
|
a.setstate(0)
|
|
self.assertEqual(a.state, 0)
|
|
self.assertEqual(a.getstate(), 0)
|
|
a.setstate(10)
|
|
self.assertEqual(a.state, 10)
|
|
self.assertEqual(a.getstate(), 10)
|
|
self.assertEqual(a[42], 0)
|
|
a[42] = 24
|
|
self.assertEqual(a[42], 24)
|
|
N = 50
|
|
for i in range(N):
|
|
a[i] = C()
|
|
for j in range(N):
|
|
a[i][j] = i*j
|
|
for i in range(N):
|
|
for j in range(N):
|
|
self.assertEqual(a[i][j], i*j)
|
|
|
|
def test_python_lists(self):
|
|
# Testing Python subclass of list...
|
|
class C(list):
|
|
def __getitem__(self, i):
|
|
if isinstance(i, slice):
|
|
return i.start, i.stop
|
|
return list.__getitem__(self, i) + 100
|
|
a = C()
|
|
a.extend([0,1,2])
|
|
self.assertEqual(a[0], 100)
|
|
self.assertEqual(a[1], 101)
|
|
self.assertEqual(a[2], 102)
|
|
self.assertEqual(a[100:200], (100,200))
|
|
|
|
def test_metaclass(self):
|
|
# Testing metaclasses...
|
|
class C(metaclass=type):
|
|
def __init__(self):
|
|
self.__state = 0
|
|
def getstate(self):
|
|
return self.__state
|
|
def setstate(self, state):
|
|
self.__state = state
|
|
a = C()
|
|
self.assertEqual(a.getstate(), 0)
|
|
a.setstate(10)
|
|
self.assertEqual(a.getstate(), 10)
|
|
class _metaclass(type):
|
|
def myself(cls): return cls
|
|
class D(metaclass=_metaclass):
|
|
pass
|
|
self.assertEqual(D.myself(), D)
|
|
d = D()
|
|
self.assertEqual(d.__class__, D)
|
|
class M1(type):
|
|
def __new__(cls, name, bases, dict):
|
|
dict['__spam__'] = 1
|
|
return type.__new__(cls, name, bases, dict)
|
|
class C(metaclass=M1):
|
|
pass
|
|
self.assertEqual(C.__spam__, 1)
|
|
c = C()
|
|
self.assertEqual(c.__spam__, 1)
|
|
|
|
class _instance(object):
|
|
pass
|
|
class M2(object):
|
|
@staticmethod
|
|
def __new__(cls, name, bases, dict):
|
|
self = object.__new__(cls)
|
|
self.name = name
|
|
self.bases = bases
|
|
self.dict = dict
|
|
return self
|
|
def __call__(self):
|
|
it = _instance()
|
|
# Early binding of methods
|
|
for key in self.dict:
|
|
if key.startswith("__"):
|
|
continue
|
|
setattr(it, key, self.dict[key].__get__(it, self))
|
|
return it
|
|
class C(metaclass=M2):
|
|
def spam(self):
|
|
return 42
|
|
self.assertEqual(C.name, 'C')
|
|
self.assertEqual(C.bases, ())
|
|
self.assertIn('spam', C.dict)
|
|
c = C()
|
|
self.assertEqual(c.spam(), 42)
|
|
|
|
# More metaclass examples
|
|
|
|
class autosuper(type):
|
|
# Automatically add __super to the class
|
|
# This trick only works for dynamic classes
|
|
def __new__(metaclass, name, bases, dict):
|
|
cls = super(autosuper, metaclass).__new__(metaclass,
|
|
name, bases, dict)
|
|
# Name mangling for __super removes leading underscores
|
|
while name[:1] == "_":
|
|
name = name[1:]
|
|
if name:
|
|
name = "_%s__super" % name
|
|
else:
|
|
name = "__super"
|
|
setattr(cls, name, super(cls))
|
|
return cls
|
|
class A(metaclass=autosuper):
|
|
def meth(self):
|
|
return "A"
|
|
class B(A):
|
|
def meth(self):
|
|
return "B" + self.__super.meth()
|
|
class C(A):
|
|
def meth(self):
|
|
return "C" + self.__super.meth()
|
|
class D(C, B):
|
|
def meth(self):
|
|
return "D" + self.__super.meth()
|
|
self.assertEqual(D().meth(), "DCBA")
|
|
class E(B, C):
|
|
def meth(self):
|
|
return "E" + self.__super.meth()
|
|
self.assertEqual(E().meth(), "EBCA")
|
|
|
|
class autoproperty(type):
|
|
# Automatically create property attributes when methods
|
|
# named _get_x and/or _set_x are found
|
|
def __new__(metaclass, name, bases, dict):
|
|
hits = {}
|
|
for key, val in dict.items():
|
|
if key.startswith("_get_"):
|
|
key = key[5:]
|
|
get, set = hits.get(key, (None, None))
|
|
get = val
|
|
hits[key] = get, set
|
|
elif key.startswith("_set_"):
|
|
key = key[5:]
|
|
get, set = hits.get(key, (None, None))
|
|
set = val
|
|
hits[key] = get, set
|
|
for key, (get, set) in hits.items():
|
|
dict[key] = property(get, set)
|
|
return super(autoproperty, metaclass).__new__(metaclass,
|
|
name, bases, dict)
|
|
class A(metaclass=autoproperty):
|
|
def _get_x(self):
|
|
return -self.__x
|
|
def _set_x(self, x):
|
|
self.__x = -x
|
|
a = A()
|
|
self.assertNotHasAttr(a, "x")
|
|
a.x = 12
|
|
self.assertEqual(a.x, 12)
|
|
self.assertEqual(a._A__x, -12)
|
|
|
|
class multimetaclass(autoproperty, autosuper):
|
|
# Merge of multiple cooperating metaclasses
|
|
pass
|
|
class A(metaclass=multimetaclass):
|
|
def _get_x(self):
|
|
return "A"
|
|
class B(A):
|
|
def _get_x(self):
|
|
return "B" + self.__super._get_x()
|
|
class C(A):
|
|
def _get_x(self):
|
|
return "C" + self.__super._get_x()
|
|
class D(C, B):
|
|
def _get_x(self):
|
|
return "D" + self.__super._get_x()
|
|
self.assertEqual(D().x, "DCBA")
|
|
|
|
# Make sure type(x) doesn't call x.__class__.__init__
|
|
class T(type):
|
|
counter = 0
|
|
def __init__(self, *args):
|
|
T.counter += 1
|
|
class C(metaclass=T):
|
|
pass
|
|
self.assertEqual(T.counter, 1)
|
|
a = C()
|
|
self.assertEqual(type(a), C)
|
|
self.assertEqual(T.counter, 1)
|
|
|
|
class C(object): pass
|
|
c = C()
|
|
try: c()
|
|
except TypeError: pass
|
|
else: self.fail("calling object w/o call method should raise "
|
|
"TypeError")
|
|
|
|
# Testing code to find most derived baseclass
|
|
class A(type):
|
|
def __new__(*args, **kwargs):
|
|
return type.__new__(*args, **kwargs)
|
|
|
|
class B(object):
|
|
pass
|
|
|
|
class C(object, metaclass=A):
|
|
pass
|
|
|
|
# The most derived metaclass of D is A rather than type.
|
|
class D(B, C):
|
|
pass
|
|
self.assertIs(A, type(D))
|
|
|
|
# issue1294232: correct metaclass calculation
|
|
new_calls = [] # to check the order of __new__ calls
|
|
class AMeta(type):
|
|
@staticmethod
|
|
def __new__(mcls, name, bases, ns):
|
|
new_calls.append('AMeta')
|
|
return super().__new__(mcls, name, bases, ns)
|
|
@classmethod
|
|
def __prepare__(mcls, name, bases):
|
|
return {}
|
|
|
|
class BMeta(AMeta):
|
|
@staticmethod
|
|
def __new__(mcls, name, bases, ns):
|
|
new_calls.append('BMeta')
|
|
return super().__new__(mcls, name, bases, ns)
|
|
@classmethod
|
|
def __prepare__(mcls, name, bases):
|
|
ns = super().__prepare__(name, bases)
|
|
ns['BMeta_was_here'] = True
|
|
return ns
|
|
|
|
class A(metaclass=AMeta):
|
|
pass
|
|
self.assertEqual(['AMeta'], new_calls)
|
|
new_calls.clear()
|
|
|
|
class B(metaclass=BMeta):
|
|
pass
|
|
# BMeta.__new__ calls AMeta.__new__ with super:
|
|
self.assertEqual(['BMeta', 'AMeta'], new_calls)
|
|
new_calls.clear()
|
|
|
|
class C(A, B):
|
|
pass
|
|
# The most derived metaclass is BMeta:
|
|
self.assertEqual(['BMeta', 'AMeta'], new_calls)
|
|
new_calls.clear()
|
|
# BMeta.__prepare__ should've been called:
|
|
self.assertIn('BMeta_was_here', C.__dict__)
|
|
|
|
# The order of the bases shouldn't matter:
|
|
class C2(B, A):
|
|
pass
|
|
self.assertEqual(['BMeta', 'AMeta'], new_calls)
|
|
new_calls.clear()
|
|
self.assertIn('BMeta_was_here', C2.__dict__)
|
|
|
|
# Check correct metaclass calculation when a metaclass is declared:
|
|
class D(C, metaclass=type):
|
|
pass
|
|
self.assertEqual(['BMeta', 'AMeta'], new_calls)
|
|
new_calls.clear()
|
|
self.assertIn('BMeta_was_here', D.__dict__)
|
|
|
|
class E(C, metaclass=AMeta):
|
|
pass
|
|
self.assertEqual(['BMeta', 'AMeta'], new_calls)
|
|
new_calls.clear()
|
|
self.assertIn('BMeta_was_here', E.__dict__)
|
|
|
|
# Special case: the given metaclass isn't a class,
|
|
# so there is no metaclass calculation.
|
|
marker = object()
|
|
def func(*args, **kwargs):
|
|
return marker
|
|
class X(metaclass=func):
|
|
pass
|
|
class Y(object, metaclass=func):
|
|
pass
|
|
class Z(D, metaclass=func):
|
|
pass
|
|
self.assertIs(marker, X)
|
|
self.assertIs(marker, Y)
|
|
self.assertIs(marker, Z)
|
|
|
|
# The given metaclass is a class,
|
|
# but not a descendant of type.
|
|
prepare_calls = [] # to track __prepare__ calls
|
|
class ANotMeta:
|
|
def __new__(mcls, *args, **kwargs):
|
|
new_calls.append('ANotMeta')
|
|
return super().__new__(mcls)
|
|
@classmethod
|
|
def __prepare__(mcls, name, bases):
|
|
prepare_calls.append('ANotMeta')
|
|
return {}
|
|
class BNotMeta(ANotMeta):
|
|
def __new__(mcls, *args, **kwargs):
|
|
new_calls.append('BNotMeta')
|
|
return super().__new__(mcls)
|
|
@classmethod
|
|
def __prepare__(mcls, name, bases):
|
|
prepare_calls.append('BNotMeta')
|
|
return super().__prepare__(name, bases)
|
|
|
|
class A(metaclass=ANotMeta):
|
|
pass
|
|
self.assertIs(ANotMeta, type(A))
|
|
self.assertEqual(['ANotMeta'], prepare_calls)
|
|
prepare_calls.clear()
|
|
self.assertEqual(['ANotMeta'], new_calls)
|
|
new_calls.clear()
|
|
|
|
class B(metaclass=BNotMeta):
|
|
pass
|
|
self.assertIs(BNotMeta, type(B))
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], prepare_calls)
|
|
prepare_calls.clear()
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], new_calls)
|
|
new_calls.clear()
|
|
|
|
class C(A, B):
|
|
pass
|
|
self.assertIs(BNotMeta, type(C))
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], new_calls)
|
|
new_calls.clear()
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], prepare_calls)
|
|
prepare_calls.clear()
|
|
|
|
class C2(B, A):
|
|
pass
|
|
self.assertIs(BNotMeta, type(C2))
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], new_calls)
|
|
new_calls.clear()
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], prepare_calls)
|
|
prepare_calls.clear()
|
|
|
|
# This is a TypeError, because of a metaclass conflict:
|
|
# BNotMeta is neither a subclass, nor a superclass of type
|
|
with self.assertRaises(TypeError):
|
|
class D(C, metaclass=type):
|
|
pass
|
|
|
|
class E(C, metaclass=ANotMeta):
|
|
pass
|
|
self.assertIs(BNotMeta, type(E))
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], new_calls)
|
|
new_calls.clear()
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], prepare_calls)
|
|
prepare_calls.clear()
|
|
|
|
class F(object(), C):
|
|
pass
|
|
self.assertIs(BNotMeta, type(F))
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], new_calls)
|
|
new_calls.clear()
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], prepare_calls)
|
|
prepare_calls.clear()
|
|
|
|
class F2(C, object()):
|
|
pass
|
|
self.assertIs(BNotMeta, type(F2))
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], new_calls)
|
|
new_calls.clear()
|
|
self.assertEqual(['BNotMeta', 'ANotMeta'], prepare_calls)
|
|
prepare_calls.clear()
|
|
|
|
# TypeError: BNotMeta is neither a
|
|
# subclass, nor a superclass of int
|
|
with self.assertRaises(TypeError):
|
|
class X(C, int()):
|
|
pass
|
|
with self.assertRaises(TypeError):
|
|
class X(int(), C):
|
|
pass
|
|
|
|
def test_module_subclasses(self):
|
|
# Testing Python subclass of module...
|
|
log = []
|
|
MT = type(sys)
|
|
class MM(MT):
|
|
def __init__(self, name):
|
|
MT.__init__(self, name)
|
|
def __getattribute__(self, name):
|
|
log.append(("getattr", name))
|
|
return MT.__getattribute__(self, name)
|
|
def __setattr__(self, name, value):
|
|
log.append(("setattr", name, value))
|
|
MT.__setattr__(self, name, value)
|
|
def __delattr__(self, name):
|
|
log.append(("delattr", name))
|
|
MT.__delattr__(self, name)
|
|
a = MM("a")
|
|
a.foo = 12
|
|
x = a.foo
|
|
del a.foo
|
|
self.assertEqual(log, [("setattr", "foo", 12),
|
|
("getattr", "foo"),
|
|
("delattr", "foo")])
|
|
|
|
# http://python.org/sf/1174712
|
|
try:
|
|
class Module(types.ModuleType, str):
|
|
pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("inheriting from ModuleType and str at the same time "
|
|
"should fail")
|
|
|
|
# Issue 34805: Verify that definition order is retained
|
|
def random_name():
|
|
return ''.join(random.choices(string.ascii_letters, k=10))
|
|
class A:
|
|
pass
|
|
subclasses = [type(random_name(), (A,), {}) for i in range(100)]
|
|
self.assertEqual(A.__subclasses__(), subclasses)
|
|
|
|
def test_multiple_inheritance(self):
|
|
# Testing multiple inheritance...
|
|
class C(object):
|
|
def __init__(self):
|
|
self.__state = 0
|
|
def getstate(self):
|
|
return self.__state
|
|
def setstate(self, state):
|
|
self.__state = state
|
|
a = C()
|
|
self.assertEqual(a.getstate(), 0)
|
|
a.setstate(10)
|
|
self.assertEqual(a.getstate(), 10)
|
|
class D(dict, C):
|
|
def __init__(self):
|
|
type({}).__init__(self)
|
|
C.__init__(self)
|
|
d = D()
|
|
self.assertEqual(list(d.keys()), [])
|
|
d["hello"] = "world"
|
|
self.assertEqual(list(d.items()), [("hello", "world")])
|
|
self.assertEqual(d["hello"], "world")
|
|
self.assertEqual(d.getstate(), 0)
|
|
d.setstate(10)
|
|
self.assertEqual(d.getstate(), 10)
|
|
self.assertEqual(D.__mro__, (D, dict, C, object))
|
|
|
|
# SF bug #442833
|
|
class Node(object):
|
|
def __int__(self):
|
|
return int(self.foo())
|
|
def foo(self):
|
|
return "23"
|
|
class Frag(Node, list):
|
|
def foo(self):
|
|
return "42"
|
|
self.assertEqual(Node().__int__(), 23)
|
|
self.assertEqual(int(Node()), 23)
|
|
self.assertEqual(Frag().__int__(), 42)
|
|
self.assertEqual(int(Frag()), 42)
|
|
|
|
def test_diamond_inheritance(self):
|
|
# Testing multiple inheritance special cases...
|
|
class A(object):
|
|
def spam(self): return "A"
|
|
self.assertEqual(A().spam(), "A")
|
|
class B(A):
|
|
def boo(self): return "B"
|
|
def spam(self): return "B"
|
|
self.assertEqual(B().spam(), "B")
|
|
self.assertEqual(B().boo(), "B")
|
|
class C(A):
|
|
def boo(self): return "C"
|
|
self.assertEqual(C().spam(), "A")
|
|
self.assertEqual(C().boo(), "C")
|
|
class D(B, C): pass
|
|
self.assertEqual(D().spam(), "B")
|
|
self.assertEqual(D().boo(), "B")
|
|
self.assertEqual(D.__mro__, (D, B, C, A, object))
|
|
class E(C, B): pass
|
|
self.assertEqual(E().spam(), "B")
|
|
self.assertEqual(E().boo(), "C")
|
|
self.assertEqual(E.__mro__, (E, C, B, A, object))
|
|
# MRO order disagreement
|
|
try:
|
|
class F(D, E): pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("expected MRO order disagreement (F)")
|
|
try:
|
|
class G(E, D): pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("expected MRO order disagreement (G)")
|
|
|
|
# see thread python-dev/2002-October/029035.html
|
|
def test_ex5_from_c3_switch(self):
|
|
# Testing ex5 from C3 switch discussion...
|
|
class A(object): pass
|
|
class B(object): pass
|
|
class C(object): pass
|
|
class X(A): pass
|
|
class Y(A): pass
|
|
class Z(X,B,Y,C): pass
|
|
self.assertEqual(Z.__mro__, (Z, X, B, Y, A, C, object))
|
|
|
|
# see "A Monotonic Superclass Linearization for Dylan",
|
|
# by Kim Barrett et al. (OOPSLA 1996)
|
|
def test_monotonicity(self):
|
|
# Testing MRO monotonicity...
|
|
class Boat(object): pass
|
|
class DayBoat(Boat): pass
|
|
class WheelBoat(Boat): pass
|
|
class EngineLess(DayBoat): pass
|
|
class SmallMultihull(DayBoat): pass
|
|
class PedalWheelBoat(EngineLess,WheelBoat): pass
|
|
class SmallCatamaran(SmallMultihull): pass
|
|
class Pedalo(PedalWheelBoat,SmallCatamaran): pass
|
|
|
|
self.assertEqual(PedalWheelBoat.__mro__,
|
|
(PedalWheelBoat, EngineLess, DayBoat, WheelBoat, Boat, object))
|
|
self.assertEqual(SmallCatamaran.__mro__,
|
|
(SmallCatamaran, SmallMultihull, DayBoat, Boat, object))
|
|
self.assertEqual(Pedalo.__mro__,
|
|
(Pedalo, PedalWheelBoat, EngineLess, SmallCatamaran,
|
|
SmallMultihull, DayBoat, WheelBoat, Boat, object))
|
|
|
|
# see "A Monotonic Superclass Linearization for Dylan",
|
|
# by Kim Barrett et al. (OOPSLA 1996)
|
|
def test_consistency_with_epg(self):
|
|
# Testing consistency with EPG...
|
|
class Pane(object): pass
|
|
class ScrollingMixin(object): pass
|
|
class EditingMixin(object): pass
|
|
class ScrollablePane(Pane,ScrollingMixin): pass
|
|
class EditablePane(Pane,EditingMixin): pass
|
|
class EditableScrollablePane(ScrollablePane,EditablePane): pass
|
|
|
|
self.assertEqual(EditableScrollablePane.__mro__,
|
|
(EditableScrollablePane, ScrollablePane, EditablePane, Pane,
|
|
ScrollingMixin, EditingMixin, object))
|
|
|
|
def test_mro_disagreement(self):
|
|
# Testing error messages for MRO disagreement...
|
|
mro_err_msg = """Cannot create a consistent method resolution
|
|
order (MRO) for bases """
|
|
|
|
def raises(exc, expected, callable, *args):
|
|
try:
|
|
callable(*args)
|
|
except exc as msg:
|
|
# the exact msg is generally considered an impl detail
|
|
if support.check_impl_detail():
|
|
if not str(msg).startswith(expected):
|
|
self.fail("Message %r, expected %r" %
|
|
(str(msg), expected))
|
|
else:
|
|
self.fail("Expected %s" % exc)
|
|
|
|
class A(object): pass
|
|
class B(A): pass
|
|
class C(object): pass
|
|
|
|
# Test some very simple errors
|
|
raises(TypeError, "duplicate base class A",
|
|
type, "X", (A, A), {})
|
|
raises(TypeError, mro_err_msg,
|
|
type, "X", (A, B), {})
|
|
raises(TypeError, mro_err_msg,
|
|
type, "X", (A, C, B), {})
|
|
# Test a slightly more complex error
|
|
class GridLayout(object): pass
|
|
class HorizontalGrid(GridLayout): pass
|
|
class VerticalGrid(GridLayout): pass
|
|
class HVGrid(HorizontalGrid, VerticalGrid): pass
|
|
class VHGrid(VerticalGrid, HorizontalGrid): pass
|
|
raises(TypeError, mro_err_msg,
|
|
type, "ConfusedGrid", (HVGrid, VHGrid), {})
|
|
|
|
def test_object_class(self):
|
|
# Testing object class...
|
|
a = object()
|
|
self.assertEqual(a.__class__, object)
|
|
self.assertEqual(type(a), object)
|
|
b = object()
|
|
self.assertNotEqual(a, b)
|
|
self.assertNotHasAttr(a, "foo")
|
|
try:
|
|
a.foo = 12
|
|
except (AttributeError, TypeError):
|
|
pass
|
|
else:
|
|
self.fail("object() should not allow setting a foo attribute")
|
|
self.assertNotHasAttr(object(), "__dict__")
|
|
|
|
class Cdict(object):
|
|
pass
|
|
x = Cdict()
|
|
self.assertEqual(x.__dict__, {})
|
|
x.foo = 1
|
|
self.assertEqual(x.foo, 1)
|
|
self.assertEqual(x.__dict__, {'foo': 1})
|
|
|
|
def test_object_class_assignment_between_heaptypes_and_nonheaptypes(self):
|
|
class SubType(types.ModuleType):
|
|
a = 1
|
|
|
|
m = types.ModuleType("m")
|
|
self.assertTrue(m.__class__ is types.ModuleType)
|
|
self.assertFalse(hasattr(m, "a"))
|
|
|
|
m.__class__ = SubType
|
|
self.assertTrue(m.__class__ is SubType)
|
|
self.assertTrue(hasattr(m, "a"))
|
|
|
|
m.__class__ = types.ModuleType
|
|
self.assertTrue(m.__class__ is types.ModuleType)
|
|
self.assertFalse(hasattr(m, "a"))
|
|
|
|
# Make sure that builtin immutable objects don't support __class__
|
|
# assignment, because the object instances may be interned.
|
|
# We set __slots__ = () to ensure that the subclasses are
|
|
# memory-layout compatible, and thus otherwise reasonable candidates
|
|
# for __class__ assignment.
|
|
|
|
# The following types have immutable instances, but are not
|
|
# subclassable and thus don't need to be checked:
|
|
# NoneType, bool
|
|
|
|
class MyInt(int):
|
|
__slots__ = ()
|
|
with self.assertRaises(TypeError):
|
|
(1).__class__ = MyInt
|
|
|
|
class MyFloat(float):
|
|
__slots__ = ()
|
|
with self.assertRaises(TypeError):
|
|
(1.0).__class__ = MyFloat
|
|
|
|
class MyComplex(complex):
|
|
__slots__ = ()
|
|
with self.assertRaises(TypeError):
|
|
(1 + 2j).__class__ = MyComplex
|
|
|
|
class MyStr(str):
|
|
__slots__ = ()
|
|
with self.assertRaises(TypeError):
|
|
"a".__class__ = MyStr
|
|
|
|
class MyBytes(bytes):
|
|
__slots__ = ()
|
|
with self.assertRaises(TypeError):
|
|
b"a".__class__ = MyBytes
|
|
|
|
class MyTuple(tuple):
|
|
__slots__ = ()
|
|
with self.assertRaises(TypeError):
|
|
().__class__ = MyTuple
|
|
|
|
class MyFrozenSet(frozenset):
|
|
__slots__ = ()
|
|
with self.assertRaises(TypeError):
|
|
frozenset().__class__ = MyFrozenSet
|
|
|
|
def test_slots(self):
|
|
# Testing __slots__...
|
|
class C0(object):
|
|
__slots__ = []
|
|
x = C0()
|
|
self.assertNotHasAttr(x, "__dict__")
|
|
self.assertNotHasAttr(x, "foo")
|
|
|
|
class C1(object):
|
|
__slots__ = ['a']
|
|
x = C1()
|
|
self.assertNotHasAttr(x, "__dict__")
|
|
self.assertNotHasAttr(x, "a")
|
|
x.a = 1
|
|
self.assertEqual(x.a, 1)
|
|
x.a = None
|
|
self.assertEqual(x.a, None)
|
|
del x.a
|
|
self.assertNotHasAttr(x, "a")
|
|
|
|
class C3(object):
|
|
__slots__ = ['a', 'b', 'c']
|
|
x = C3()
|
|
self.assertNotHasAttr(x, "__dict__")
|
|
self.assertNotHasAttr(x, 'a')
|
|
self.assertNotHasAttr(x, 'b')
|
|
self.assertNotHasAttr(x, 'c')
|
|
x.a = 1
|
|
x.b = 2
|
|
x.c = 3
|
|
self.assertEqual(x.a, 1)
|
|
self.assertEqual(x.b, 2)
|
|
self.assertEqual(x.c, 3)
|
|
|
|
class C4(object):
|
|
"""Validate name mangling"""
|
|
__slots__ = ['__a']
|
|
def __init__(self, value):
|
|
self.__a = value
|
|
def get(self):
|
|
return self.__a
|
|
x = C4(5)
|
|
self.assertNotHasAttr(x, '__dict__')
|
|
self.assertNotHasAttr(x, '__a')
|
|
self.assertEqual(x.get(), 5)
|
|
try:
|
|
x.__a = 6
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
self.fail("Double underscored names not mangled")
|
|
|
|
# Make sure slot names are proper identifiers
|
|
try:
|
|
class C(object):
|
|
__slots__ = [None]
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("[None] slots not caught")
|
|
try:
|
|
class C(object):
|
|
__slots__ = ["foo bar"]
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("['foo bar'] slots not caught")
|
|
try:
|
|
class C(object):
|
|
__slots__ = ["foo\0bar"]
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("['foo\\0bar'] slots not caught")
|
|
try:
|
|
class C(object):
|
|
__slots__ = ["1"]
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("['1'] slots not caught")
|
|
try:
|
|
class C(object):
|
|
__slots__ = [""]
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("[''] slots not caught")
|
|
class C(object):
|
|
__slots__ = ["a", "a_b", "_a", "A0123456789Z"]
|
|
# XXX(nnorwitz): was there supposed to be something tested
|
|
# from the class above?
|
|
|
|
# Test a single string is not expanded as a sequence.
|
|
class C(object):
|
|
__slots__ = "abc"
|
|
c = C()
|
|
c.abc = 5
|
|
self.assertEqual(c.abc, 5)
|
|
|
|
# Test unicode slot names
|
|
# Test a single unicode string is not expanded as a sequence.
|
|
class C(object):
|
|
__slots__ = "abc"
|
|
c = C()
|
|
c.abc = 5
|
|
self.assertEqual(c.abc, 5)
|
|
|
|
# _unicode_to_string used to modify slots in certain circumstances
|
|
slots = ("foo", "bar")
|
|
class C(object):
|
|
__slots__ = slots
|
|
x = C()
|
|
x.foo = 5
|
|
self.assertEqual(x.foo, 5)
|
|
self.assertIs(type(slots[0]), str)
|
|
# this used to leak references
|
|
try:
|
|
class C(object):
|
|
__slots__ = [chr(128)]
|
|
except (TypeError, UnicodeEncodeError):
|
|
pass
|
|
else:
|
|
self.fail("[chr(128)] slots not caught")
|
|
|
|
# Test leaks
|
|
class Counted(object):
|
|
counter = 0 # counts the number of instances alive
|
|
def __init__(self):
|
|
Counted.counter += 1
|
|
def __del__(self):
|
|
Counted.counter -= 1
|
|
class C(object):
|
|
__slots__ = ['a', 'b', 'c']
|
|
x = C()
|
|
x.a = Counted()
|
|
x.b = Counted()
|
|
x.c = Counted()
|
|
self.assertEqual(Counted.counter, 3)
|
|
del x
|
|
support.gc_collect()
|
|
self.assertEqual(Counted.counter, 0)
|
|
class D(C):
|
|
pass
|
|
x = D()
|
|
x.a = Counted()
|
|
x.z = Counted()
|
|
self.assertEqual(Counted.counter, 2)
|
|
del x
|
|
support.gc_collect()
|
|
self.assertEqual(Counted.counter, 0)
|
|
class E(D):
|
|
__slots__ = ['e']
|
|
x = E()
|
|
x.a = Counted()
|
|
x.z = Counted()
|
|
x.e = Counted()
|
|
self.assertEqual(Counted.counter, 3)
|
|
del x
|
|
support.gc_collect()
|
|
self.assertEqual(Counted.counter, 0)
|
|
|
|
# Test cyclical leaks [SF bug 519621]
|
|
class F(object):
|
|
__slots__ = ['a', 'b']
|
|
s = F()
|
|
s.a = [Counted(), s]
|
|
self.assertEqual(Counted.counter, 1)
|
|
s = None
|
|
support.gc_collect()
|
|
self.assertEqual(Counted.counter, 0)
|
|
|
|
# Test lookup leaks [SF bug 572567]
|
|
if hasattr(gc, 'get_objects'):
|
|
class G(object):
|
|
def __eq__(self, other):
|
|
return False
|
|
g = G()
|
|
orig_objects = len(gc.get_objects())
|
|
for i in range(10):
|
|
g==g
|
|
new_objects = len(gc.get_objects())
|
|
self.assertEqual(orig_objects, new_objects)
|
|
|
|
class H(object):
|
|
__slots__ = ['a', 'b']
|
|
def __init__(self):
|
|
self.a = 1
|
|
self.b = 2
|
|
def __del__(self_):
|
|
self.assertEqual(self_.a, 1)
|
|
self.assertEqual(self_.b, 2)
|
|
with support.captured_output('stderr') as s:
|
|
h = H()
|
|
del h
|
|
self.assertEqual(s.getvalue(), '')
|
|
|
|
class X(object):
|
|
__slots__ = "a"
|
|
with self.assertRaises(AttributeError):
|
|
del X().a
|
|
|
|
def test_slots_special(self):
|
|
# Testing __dict__ and __weakref__ in __slots__...
|
|
class D(object):
|
|
__slots__ = ["__dict__"]
|
|
a = D()
|
|
self.assertHasAttr(a, "__dict__")
|
|
self.assertNotHasAttr(a, "__weakref__")
|
|
a.foo = 42
|
|
self.assertEqual(a.__dict__, {"foo": 42})
|
|
|
|
class W(object):
|
|
__slots__ = ["__weakref__"]
|
|
a = W()
|
|
self.assertHasAttr(a, "__weakref__")
|
|
self.assertNotHasAttr(a, "__dict__")
|
|
try:
|
|
a.foo = 42
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't be allowed to set a.foo")
|
|
|
|
class C1(W, D):
|
|
__slots__ = []
|
|
a = C1()
|
|
self.assertHasAttr(a, "__dict__")
|
|
self.assertHasAttr(a, "__weakref__")
|
|
a.foo = 42
|
|
self.assertEqual(a.__dict__, {"foo": 42})
|
|
|
|
class C2(D, W):
|
|
__slots__ = []
|
|
a = C2()
|
|
self.assertHasAttr(a, "__dict__")
|
|
self.assertHasAttr(a, "__weakref__")
|
|
a.foo = 42
|
|
self.assertEqual(a.__dict__, {"foo": 42})
|
|
|
|
def test_slots_special2(self):
|
|
# Testing __qualname__ and __classcell__ in __slots__
|
|
class Meta(type):
|
|
def __new__(cls, name, bases, namespace, attr):
|
|
self.assertIn(attr, namespace)
|
|
return super().__new__(cls, name, bases, namespace)
|
|
|
|
class C1:
|
|
def __init__(self):
|
|
self.b = 42
|
|
class C2(C1, metaclass=Meta, attr="__classcell__"):
|
|
__slots__ = ["__classcell__"]
|
|
def __init__(self):
|
|
super().__init__()
|
|
self.assertIsInstance(C2.__dict__["__classcell__"],
|
|
types.MemberDescriptorType)
|
|
c = C2()
|
|
self.assertEqual(c.b, 42)
|
|
self.assertNotHasAttr(c, "__classcell__")
|
|
c.__classcell__ = 42
|
|
self.assertEqual(c.__classcell__, 42)
|
|
with self.assertRaises(TypeError):
|
|
class C3:
|
|
__classcell__ = 42
|
|
__slots__ = ["__classcell__"]
|
|
|
|
class Q1(metaclass=Meta, attr="__qualname__"):
|
|
__slots__ = ["__qualname__"]
|
|
self.assertEqual(Q1.__qualname__, C1.__qualname__[:-2] + "Q1")
|
|
self.assertIsInstance(Q1.__dict__["__qualname__"],
|
|
types.MemberDescriptorType)
|
|
q = Q1()
|
|
self.assertNotHasAttr(q, "__qualname__")
|
|
q.__qualname__ = "q"
|
|
self.assertEqual(q.__qualname__, "q")
|
|
with self.assertRaises(TypeError):
|
|
class Q2:
|
|
__qualname__ = object()
|
|
__slots__ = ["__qualname__"]
|
|
|
|
def test_slots_descriptor(self):
|
|
# Issue2115: slot descriptors did not correctly check
|
|
# the type of the given object
|
|
import abc
|
|
class MyABC(metaclass=abc.ABCMeta):
|
|
__slots__ = "a"
|
|
|
|
class Unrelated(object):
|
|
pass
|
|
MyABC.register(Unrelated)
|
|
|
|
u = Unrelated()
|
|
self.assertIsInstance(u, MyABC)
|
|
|
|
# This used to crash
|
|
self.assertRaises(TypeError, MyABC.a.__set__, u, 3)
|
|
|
|
def test_dynamics(self):
|
|
# Testing class attribute propagation...
|
|
class D(object):
|
|
pass
|
|
class E(D):
|
|
pass
|
|
class F(D):
|
|
pass
|
|
D.foo = 1
|
|
self.assertEqual(D.foo, 1)
|
|
# Test that dynamic attributes are inherited
|
|
self.assertEqual(E.foo, 1)
|
|
self.assertEqual(F.foo, 1)
|
|
# Test dynamic instances
|
|
class C(object):
|
|
pass
|
|
a = C()
|
|
self.assertNotHasAttr(a, "foobar")
|
|
C.foobar = 2
|
|
self.assertEqual(a.foobar, 2)
|
|
C.method = lambda self: 42
|
|
self.assertEqual(a.method(), 42)
|
|
C.__repr__ = lambda self: "C()"
|
|
self.assertEqual(repr(a), "C()")
|
|
C.__int__ = lambda self: 100
|
|
self.assertEqual(int(a), 100)
|
|
self.assertEqual(a.foobar, 2)
|
|
self.assertNotHasAttr(a, "spam")
|
|
def mygetattr(self, name):
|
|
if name == "spam":
|
|
return "spam"
|
|
raise AttributeError
|
|
C.__getattr__ = mygetattr
|
|
self.assertEqual(a.spam, "spam")
|
|
a.new = 12
|
|
self.assertEqual(a.new, 12)
|
|
def mysetattr(self, name, value):
|
|
if name == "spam":
|
|
raise AttributeError
|
|
return object.__setattr__(self, name, value)
|
|
C.__setattr__ = mysetattr
|
|
try:
|
|
a.spam = "not spam"
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
self.fail("expected AttributeError")
|
|
self.assertEqual(a.spam, "spam")
|
|
class D(C):
|
|
pass
|
|
d = D()
|
|
d.foo = 1
|
|
self.assertEqual(d.foo, 1)
|
|
|
|
# Test handling of int*seq and seq*int
|
|
class I(int):
|
|
pass
|
|
self.assertEqual("a"*I(2), "aa")
|
|
self.assertEqual(I(2)*"a", "aa")
|
|
self.assertEqual(2*I(3), 6)
|
|
self.assertEqual(I(3)*2, 6)
|
|
self.assertEqual(I(3)*I(2), 6)
|
|
|
|
# Test comparison of classes with dynamic metaclasses
|
|
class dynamicmetaclass(type):
|
|
pass
|
|
class someclass(metaclass=dynamicmetaclass):
|
|
pass
|
|
self.assertNotEqual(someclass, object)
|
|
|
|
def test_errors(self):
|
|
# Testing errors...
|
|
try:
|
|
class C(list, dict):
|
|
pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("inheritance from both list and dict should be illegal")
|
|
|
|
try:
|
|
class C(object, None):
|
|
pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("inheritance from non-type should be illegal")
|
|
class Classic:
|
|
pass
|
|
|
|
try:
|
|
class C(type(len)):
|
|
pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("inheritance from CFunction should be illegal")
|
|
|
|
try:
|
|
class C(object):
|
|
__slots__ = 1
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("__slots__ = 1 should be illegal")
|
|
|
|
try:
|
|
class C(object):
|
|
__slots__ = [1]
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("__slots__ = [1] should be illegal")
|
|
|
|
class M1(type):
|
|
pass
|
|
class M2(type):
|
|
pass
|
|
class A1(object, metaclass=M1):
|
|
pass
|
|
class A2(object, metaclass=M2):
|
|
pass
|
|
try:
|
|
class B(A1, A2):
|
|
pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("finding the most derived metaclass should have failed")
|
|
|
|
def test_classmethods(self):
|
|
# Testing class methods...
|
|
class C(object):
|
|
def foo(*a): return a
|
|
goo = classmethod(foo)
|
|
c = C()
|
|
self.assertEqual(C.goo(1), (C, 1))
|
|
self.assertEqual(c.goo(1), (C, 1))
|
|
self.assertEqual(c.foo(1), (c, 1))
|
|
class D(C):
|
|
pass
|
|
d = D()
|
|
self.assertEqual(D.goo(1), (D, 1))
|
|
self.assertEqual(d.goo(1), (D, 1))
|
|
self.assertEqual(d.foo(1), (d, 1))
|
|
self.assertEqual(D.foo(d, 1), (d, 1))
|
|
# Test for a specific crash (SF bug 528132)
|
|
def f(cls, arg):
|
|
"f docstring"
|
|
return (cls, arg)
|
|
ff = classmethod(f)
|
|
self.assertEqual(ff.__get__(0, int)(42), (int, 42))
|
|
self.assertEqual(ff.__get__(0)(42), (int, 42))
|
|
|
|
# Test super() with classmethods (SF bug 535444)
|
|
self.assertEqual(C.goo.__self__, C)
|
|
self.assertEqual(D.goo.__self__, D)
|
|
self.assertEqual(super(D,D).goo.__self__, D)
|
|
self.assertEqual(super(D,d).goo.__self__, D)
|
|
self.assertEqual(super(D,D).goo(), (D,))
|
|
self.assertEqual(super(D,d).goo(), (D,))
|
|
|
|
# Verify that a non-callable will raise
|
|
meth = classmethod(1).__get__(1)
|
|
self.assertRaises(TypeError, meth)
|
|
|
|
# Verify that classmethod() doesn't allow keyword args
|
|
try:
|
|
classmethod(f, kw=1)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("classmethod shouldn't accept keyword args")
|
|
|
|
cm = classmethod(f)
|
|
cm_dict = {'__annotations__': {},
|
|
'__doc__': "f docstring",
|
|
'__module__': __name__,
|
|
'__name__': 'f',
|
|
'__qualname__': f.__qualname__}
|
|
self.assertEqual(cm.__dict__, cm_dict)
|
|
|
|
cm.x = 42
|
|
self.assertEqual(cm.x, 42)
|
|
self.assertEqual(cm.__dict__, {"x" : 42, **cm_dict})
|
|
del cm.x
|
|
self.assertNotHasAttr(cm, "x")
|
|
|
|
@support.refcount_test
|
|
def test_refleaks_in_classmethod___init__(self):
|
|
gettotalrefcount = support.get_attribute(sys, 'gettotalrefcount')
|
|
cm = classmethod(None)
|
|
refs_before = gettotalrefcount()
|
|
for i in range(100):
|
|
cm.__init__(None)
|
|
self.assertAlmostEqual(gettotalrefcount() - refs_before, 0, delta=10)
|
|
|
|
@support.impl_detail("the module 'xxsubtype' is internal")
|
|
def test_classmethods_in_c(self):
|
|
# Testing C-based class methods...
|
|
import xxsubtype as spam
|
|
a = (1, 2, 3)
|
|
d = {'abc': 123}
|
|
x, a1, d1 = spam.spamlist.classmeth(*a, **d)
|
|
self.assertEqual(x, spam.spamlist)
|
|
self.assertEqual(a, a1)
|
|
self.assertEqual(d, d1)
|
|
x, a1, d1 = spam.spamlist().classmeth(*a, **d)
|
|
self.assertEqual(x, spam.spamlist)
|
|
self.assertEqual(a, a1)
|
|
self.assertEqual(d, d1)
|
|
spam_cm = spam.spamlist.__dict__['classmeth']
|
|
x2, a2, d2 = spam_cm(spam.spamlist, *a, **d)
|
|
self.assertEqual(x2, spam.spamlist)
|
|
self.assertEqual(a2, a1)
|
|
self.assertEqual(d2, d1)
|
|
class SubSpam(spam.spamlist): pass
|
|
x2, a2, d2 = spam_cm(SubSpam, *a, **d)
|
|
self.assertEqual(x2, SubSpam)
|
|
self.assertEqual(a2, a1)
|
|
self.assertEqual(d2, d1)
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
spam_cm()
|
|
self.assertEqual(
|
|
str(cm.exception),
|
|
"descriptor 'classmeth' of 'xxsubtype.spamlist' "
|
|
"object needs an argument")
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
spam_cm(spam.spamlist())
|
|
self.assertEqual(
|
|
str(cm.exception),
|
|
"descriptor 'classmeth' for type 'xxsubtype.spamlist' "
|
|
"needs a type, not a 'xxsubtype.spamlist' as arg 2")
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
spam_cm(list)
|
|
expected_errmsg = (
|
|
"descriptor 'classmeth' requires a subtype of 'xxsubtype.spamlist' "
|
|
"but received 'list'")
|
|
self.assertEqual(str(cm.exception), expected_errmsg)
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
spam_cm.__get__(None, list)
|
|
self.assertEqual(str(cm.exception), expected_errmsg)
|
|
|
|
def test_staticmethods(self):
|
|
# Testing static methods...
|
|
class C(object):
|
|
def foo(*a): return a
|
|
goo = staticmethod(foo)
|
|
c = C()
|
|
self.assertEqual(C.goo(1), (1,))
|
|
self.assertEqual(c.goo(1), (1,))
|
|
self.assertEqual(c.foo(1), (c, 1,))
|
|
class D(C):
|
|
pass
|
|
d = D()
|
|
self.assertEqual(D.goo(1), (1,))
|
|
self.assertEqual(d.goo(1), (1,))
|
|
self.assertEqual(d.foo(1), (d, 1))
|
|
self.assertEqual(D.foo(d, 1), (d, 1))
|
|
sm = staticmethod(None)
|
|
self.assertEqual(sm.__dict__, {'__doc__': None})
|
|
sm.x = 42
|
|
self.assertEqual(sm.x, 42)
|
|
self.assertEqual(sm.__dict__, {"x" : 42, '__doc__': None})
|
|
del sm.x
|
|
self.assertNotHasAttr(sm, "x")
|
|
|
|
@support.refcount_test
|
|
def test_refleaks_in_staticmethod___init__(self):
|
|
gettotalrefcount = support.get_attribute(sys, 'gettotalrefcount')
|
|
sm = staticmethod(None)
|
|
refs_before = gettotalrefcount()
|
|
for i in range(100):
|
|
sm.__init__(None)
|
|
self.assertAlmostEqual(gettotalrefcount() - refs_before, 0, delta=10)
|
|
|
|
@support.impl_detail("the module 'xxsubtype' is internal")
|
|
def test_staticmethods_in_c(self):
|
|
# Testing C-based static methods...
|
|
import xxsubtype as spam
|
|
a = (1, 2, 3)
|
|
d = {"abc": 123}
|
|
x, a1, d1 = spam.spamlist.staticmeth(*a, **d)
|
|
self.assertEqual(x, None)
|
|
self.assertEqual(a, a1)
|
|
self.assertEqual(d, d1)
|
|
x, a1, d2 = spam.spamlist().staticmeth(*a, **d)
|
|
self.assertEqual(x, None)
|
|
self.assertEqual(a, a1)
|
|
self.assertEqual(d, d1)
|
|
|
|
def test_classic(self):
|
|
# Testing classic classes...
|
|
class C:
|
|
def foo(*a): return a
|
|
goo = classmethod(foo)
|
|
c = C()
|
|
self.assertEqual(C.goo(1), (C, 1))
|
|
self.assertEqual(c.goo(1), (C, 1))
|
|
self.assertEqual(c.foo(1), (c, 1))
|
|
class D(C):
|
|
pass
|
|
d = D()
|
|
self.assertEqual(D.goo(1), (D, 1))
|
|
self.assertEqual(d.goo(1), (D, 1))
|
|
self.assertEqual(d.foo(1), (d, 1))
|
|
self.assertEqual(D.foo(d, 1), (d, 1))
|
|
class E: # *not* subclassing from C
|
|
foo = C.foo
|
|
self.assertEqual(E().foo.__func__, C.foo) # i.e., unbound
|
|
self.assertTrue(repr(C.foo.__get__(C())).startswith("<bound method "))
|
|
|
|
def test_compattr(self):
|
|
# Testing computed attributes...
|
|
class C(object):
|
|
class computed_attribute(object):
|
|
def __init__(self, get, set=None, delete=None):
|
|
self.__get = get
|
|
self.__set = set
|
|
self.__delete = delete
|
|
def __get__(self, obj, type=None):
|
|
return self.__get(obj)
|
|
def __set__(self, obj, value):
|
|
return self.__set(obj, value)
|
|
def __delete__(self, obj):
|
|
return self.__delete(obj)
|
|
def __init__(self):
|
|
self.__x = 0
|
|
def __get_x(self):
|
|
x = self.__x
|
|
self.__x = x+1
|
|
return x
|
|
def __set_x(self, x):
|
|
self.__x = x
|
|
def __delete_x(self):
|
|
del self.__x
|
|
x = computed_attribute(__get_x, __set_x, __delete_x)
|
|
a = C()
|
|
self.assertEqual(a.x, 0)
|
|
self.assertEqual(a.x, 1)
|
|
a.x = 10
|
|
self.assertEqual(a.x, 10)
|
|
self.assertEqual(a.x, 11)
|
|
del a.x
|
|
self.assertNotHasAttr(a, 'x')
|
|
|
|
def test_newslots(self):
|
|
# Testing __new__ slot override...
|
|
class C(list):
|
|
def __new__(cls):
|
|
self = list.__new__(cls)
|
|
self.foo = 1
|
|
return self
|
|
def __init__(self):
|
|
self.foo = self.foo + 2
|
|
a = C()
|
|
self.assertEqual(a.foo, 3)
|
|
self.assertEqual(a.__class__, C)
|
|
class D(C):
|
|
pass
|
|
b = D()
|
|
self.assertEqual(b.foo, 3)
|
|
self.assertEqual(b.__class__, D)
|
|
|
|
@unittest.expectedFailure
|
|
def test_bad_new(self):
|
|
self.assertRaises(TypeError, object.__new__)
|
|
self.assertRaises(TypeError, object.__new__, '')
|
|
self.assertRaises(TypeError, list.__new__, object)
|
|
self.assertRaises(TypeError, object.__new__, list)
|
|
class C(object):
|
|
__new__ = list.__new__
|
|
self.assertRaises(TypeError, C)
|
|
class C(list):
|
|
__new__ = object.__new__
|
|
self.assertRaises(TypeError, C)
|
|
|
|
def test_object_new(self):
|
|
class A(object):
|
|
pass
|
|
object.__new__(A)
|
|
self.assertRaises(TypeError, object.__new__, A, 5)
|
|
object.__init__(A())
|
|
self.assertRaises(TypeError, object.__init__, A(), 5)
|
|
|
|
class A(object):
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
object.__new__(A)
|
|
object.__new__(A, 5)
|
|
object.__init__(A(3))
|
|
self.assertRaises(TypeError, object.__init__, A(3), 5)
|
|
|
|
class A(object):
|
|
def __new__(cls, foo):
|
|
return object.__new__(cls)
|
|
object.__new__(A)
|
|
self.assertRaises(TypeError, object.__new__, A, 5)
|
|
object.__init__(A(3))
|
|
object.__init__(A(3), 5)
|
|
|
|
class A(object):
|
|
def __new__(cls, foo):
|
|
return object.__new__(cls)
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
object.__new__(A)
|
|
self.assertRaises(TypeError, object.__new__, A, 5)
|
|
object.__init__(A(3))
|
|
self.assertRaises(TypeError, object.__init__, A(3), 5)
|
|
|
|
@unittest.expectedFailure
|
|
def test_restored_object_new(self):
|
|
class A(object):
|
|
def __new__(cls, *args, **kwargs):
|
|
raise AssertionError
|
|
self.assertRaises(AssertionError, A)
|
|
class B(A):
|
|
__new__ = object.__new__
|
|
def __init__(self, foo):
|
|
self.foo = foo
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('error', DeprecationWarning)
|
|
b = B(3)
|
|
self.assertEqual(b.foo, 3)
|
|
self.assertEqual(b.__class__, B)
|
|
del B.__new__
|
|
self.assertRaises(AssertionError, B)
|
|
del A.__new__
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('error', DeprecationWarning)
|
|
b = B(3)
|
|
self.assertEqual(b.foo, 3)
|
|
self.assertEqual(b.__class__, B)
|
|
|
|
def test_altmro(self):
|
|
# Testing mro() and overriding it...
|
|
class A(object):
|
|
def f(self): return "A"
|
|
class B(A):
|
|
pass
|
|
class C(A):
|
|
def f(self): return "C"
|
|
class D(B, C):
|
|
pass
|
|
self.assertEqual(A.mro(), [A, object])
|
|
self.assertEqual(A.__mro__, (A, object))
|
|
self.assertEqual(B.mro(), [B, A, object])
|
|
self.assertEqual(B.__mro__, (B, A, object))
|
|
self.assertEqual(C.mro(), [C, A, object])
|
|
self.assertEqual(C.__mro__, (C, A, object))
|
|
self.assertEqual(D.mro(), [D, B, C, A, object])
|
|
self.assertEqual(D.__mro__, (D, B, C, A, object))
|
|
self.assertEqual(D().f(), "C")
|
|
|
|
class PerverseMetaType(type):
|
|
def mro(cls):
|
|
L = type.mro(cls)
|
|
L.reverse()
|
|
return L
|
|
class X(D,B,C,A, metaclass=PerverseMetaType):
|
|
pass
|
|
self.assertEqual(X.__mro__, (object, A, C, B, D, X))
|
|
self.assertEqual(X().f(), "A")
|
|
|
|
try:
|
|
class _metaclass(type):
|
|
def mro(self):
|
|
return [self, dict, object]
|
|
class X(object, metaclass=_metaclass):
|
|
pass
|
|
# In CPython, the class creation above already raises
|
|
# TypeError, as a protection against the fact that
|
|
# instances of X would segfault it. In other Python
|
|
# implementations it would be ok to let the class X
|
|
# be created, but instead get a clean TypeError on the
|
|
# __setitem__ below.
|
|
x = object.__new__(X)
|
|
x[5] = 6
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("devious mro() return not caught")
|
|
|
|
try:
|
|
class _metaclass(type):
|
|
def mro(self):
|
|
return [1]
|
|
class X(object, metaclass=_metaclass):
|
|
pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("non-class mro() return not caught")
|
|
|
|
try:
|
|
class _metaclass(type):
|
|
def mro(self):
|
|
return 1
|
|
class X(object, metaclass=_metaclass):
|
|
pass
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("non-sequence mro() return not caught")
|
|
|
|
def test_overloading(self):
|
|
# Testing operator overloading...
|
|
|
|
class B(object):
|
|
"Intermediate class because object doesn't have a __setattr__"
|
|
|
|
class C(B):
|
|
def __getattr__(self, name):
|
|
if name == "foo":
|
|
return ("getattr", name)
|
|
else:
|
|
raise AttributeError
|
|
def __setattr__(self, name, value):
|
|
if name == "foo":
|
|
self.setattr = (name, value)
|
|
else:
|
|
return B.__setattr__(self, name, value)
|
|
def __delattr__(self, name):
|
|
if name == "foo":
|
|
self.delattr = name
|
|
else:
|
|
return B.__delattr__(self, name)
|
|
|
|
def __getitem__(self, key):
|
|
return ("getitem", key)
|
|
def __setitem__(self, key, value):
|
|
self.setitem = (key, value)
|
|
def __delitem__(self, key):
|
|
self.delitem = key
|
|
|
|
a = C()
|
|
self.assertEqual(a.foo, ("getattr", "foo"))
|
|
a.foo = 12
|
|
self.assertEqual(a.setattr, ("foo", 12))
|
|
del a.foo
|
|
self.assertEqual(a.delattr, "foo")
|
|
|
|
self.assertEqual(a[12], ("getitem", 12))
|
|
a[12] = 21
|
|
self.assertEqual(a.setitem, (12, 21))
|
|
del a[12]
|
|
self.assertEqual(a.delitem, 12)
|
|
|
|
self.assertEqual(a[0:10], ("getitem", slice(0, 10)))
|
|
a[0:10] = "foo"
|
|
self.assertEqual(a.setitem, (slice(0, 10), "foo"))
|
|
del a[0:10]
|
|
self.assertEqual(a.delitem, (slice(0, 10)))
|
|
|
|
def test_methods(self):
|
|
# Testing methods...
|
|
class C(object):
|
|
def __init__(self, x):
|
|
self.x = x
|
|
def foo(self):
|
|
return self.x
|
|
c1 = C(1)
|
|
self.assertEqual(c1.foo(), 1)
|
|
class D(C):
|
|
boo = C.foo
|
|
goo = c1.foo
|
|
d2 = D(2)
|
|
self.assertEqual(d2.foo(), 2)
|
|
self.assertEqual(d2.boo(), 2)
|
|
self.assertEqual(d2.goo(), 1)
|
|
class E(object):
|
|
foo = C.foo
|
|
self.assertEqual(E().foo.__func__, C.foo) # i.e., unbound
|
|
self.assertTrue(repr(C.foo.__get__(C(1))).startswith("<bound method "))
|
|
|
|
@support.impl_detail("testing error message from implementation")
|
|
def test_methods_in_c(self):
|
|
# This test checks error messages in builtin method descriptor.
|
|
# It is allowed that other Python implementations use
|
|
# different error messages.
|
|
set_add = set.add
|
|
|
|
expected_errmsg = "unbound method set.add() needs an argument"
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
set_add()
|
|
self.assertEqual(cm.exception.args[0], expected_errmsg)
|
|
|
|
expected_errmsg = "descriptor 'add' for 'set' objects doesn't apply to a 'int' object"
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
set_add(0)
|
|
self.assertEqual(cm.exception.args[0], expected_errmsg)
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
set_add.__get__(0)
|
|
self.assertEqual(cm.exception.args[0], expected_errmsg)
|
|
|
|
def test_special_method_lookup(self):
|
|
# The lookup of special methods bypasses __getattr__ and
|
|
# __getattribute__, but they still can be descriptors.
|
|
|
|
def run_context(manager):
|
|
with manager:
|
|
pass
|
|
def iden(self):
|
|
return self
|
|
def hello(self):
|
|
return b"hello"
|
|
def empty_seq(self):
|
|
return []
|
|
def zero(self):
|
|
return 0
|
|
def complex_num(self):
|
|
return 1j
|
|
def stop(self):
|
|
raise StopIteration
|
|
def return_true(self, thing=None):
|
|
return True
|
|
def do_isinstance(obj):
|
|
return isinstance(int, obj)
|
|
def do_issubclass(obj):
|
|
return issubclass(int, obj)
|
|
def do_dict_missing(checker):
|
|
class DictSub(checker.__class__, dict):
|
|
pass
|
|
self.assertEqual(DictSub()["hi"], 4)
|
|
def some_number(self_, key):
|
|
self.assertEqual(key, "hi")
|
|
return 4
|
|
def swallow(*args): pass
|
|
def format_impl(self, spec):
|
|
return "hello"
|
|
|
|
# It would be nice to have every special method tested here, but I'm
|
|
# only listing the ones I can remember outside of typeobject.c, since it
|
|
# does it right.
|
|
specials = [
|
|
("__bytes__", bytes, hello, set(), {}),
|
|
("__reversed__", reversed, empty_seq, set(), {}),
|
|
("__length_hint__", list, zero, set(),
|
|
{"__iter__" : iden, "__next__" : stop}),
|
|
("__sizeof__", sys.getsizeof, zero, set(), {}),
|
|
("__instancecheck__", do_isinstance, return_true, set(), {}),
|
|
("__missing__", do_dict_missing, some_number,
|
|
set(("__class__",)), {}),
|
|
("__subclasscheck__", do_issubclass, return_true,
|
|
set(("__bases__",)), {}),
|
|
("__enter__", run_context, iden, set(), {"__exit__" : swallow}),
|
|
("__exit__", run_context, swallow, set(), {"__enter__" : iden}),
|
|
("__complex__", complex, complex_num, set(), {}),
|
|
("__format__", format, format_impl, set(), {}),
|
|
("__floor__", math.floor, zero, set(), {}),
|
|
("__trunc__", math.trunc, zero, set(), {}),
|
|
("__trunc__", int, zero, set(), {}),
|
|
("__ceil__", math.ceil, zero, set(), {}),
|
|
("__dir__", dir, empty_seq, set(), {}),
|
|
("__round__", round, zero, set(), {}),
|
|
]
|
|
|
|
class Checker(object):
|
|
def __getattr__(self, attr, test=self):
|
|
test.fail("__getattr__ called with {0}".format(attr))
|
|
def __getattribute__(self, attr, test=self):
|
|
if attr not in ok:
|
|
test.fail("__getattribute__ called with {0}".format(attr))
|
|
return object.__getattribute__(self, attr)
|
|
class SpecialDescr(object):
|
|
def __init__(self, impl):
|
|
self.impl = impl
|
|
def __get__(self, obj, owner):
|
|
record.append(1)
|
|
return self.impl.__get__(obj, owner)
|
|
class MyException(Exception):
|
|
pass
|
|
class ErrDescr(object):
|
|
def __get__(self, obj, owner):
|
|
raise MyException
|
|
|
|
for name, runner, meth_impl, ok, env in specials:
|
|
class X(Checker):
|
|
pass
|
|
for attr, obj in env.items():
|
|
setattr(X, attr, obj)
|
|
setattr(X, name, meth_impl)
|
|
runner(X())
|
|
|
|
record = []
|
|
class X(Checker):
|
|
pass
|
|
for attr, obj in env.items():
|
|
setattr(X, attr, obj)
|
|
setattr(X, name, SpecialDescr(meth_impl))
|
|
runner(X())
|
|
self.assertEqual(record, [1], name)
|
|
|
|
class X(Checker):
|
|
pass
|
|
for attr, obj in env.items():
|
|
setattr(X, attr, obj)
|
|
setattr(X, name, ErrDescr())
|
|
self.assertRaises(MyException, runner, X())
|
|
|
|
def test_specials(self):
|
|
# Testing special operators...
|
|
# Test operators like __hash__ for which a built-in default exists
|
|
|
|
# Test the default behavior for static classes
|
|
class C(object):
|
|
def __getitem__(self, i):
|
|
if 0 <= i < 10: return i
|
|
raise IndexError
|
|
c1 = C()
|
|
c2 = C()
|
|
self.assertFalse(not c1)
|
|
self.assertNotEqual(id(c1), id(c2))
|
|
hash(c1)
|
|
hash(c2)
|
|
self.assertEqual(c1, c1)
|
|
self.assertTrue(c1 != c2)
|
|
self.assertFalse(c1 != c1)
|
|
self.assertFalse(c1 == c2)
|
|
# Note that the module name appears in str/repr, and that varies
|
|
# depending on whether this test is run standalone or from a framework.
|
|
self.assertGreaterEqual(str(c1).find('C object at '), 0)
|
|
self.assertEqual(str(c1), repr(c1))
|
|
self.assertNotIn(-1, c1)
|
|
for i in range(10):
|
|
self.assertIn(i, c1)
|
|
self.assertNotIn(10, c1)
|
|
# Test the default behavior for dynamic classes
|
|
class D(object):
|
|
def __getitem__(self, i):
|
|
if 0 <= i < 10: return i
|
|
raise IndexError
|
|
d1 = D()
|
|
d2 = D()
|
|
self.assertFalse(not d1)
|
|
self.assertNotEqual(id(d1), id(d2))
|
|
hash(d1)
|
|
hash(d2)
|
|
self.assertEqual(d1, d1)
|
|
self.assertNotEqual(d1, d2)
|
|
self.assertFalse(d1 != d1)
|
|
self.assertFalse(d1 == d2)
|
|
# Note that the module name appears in str/repr, and that varies
|
|
# depending on whether this test is run standalone or from a framework.
|
|
self.assertGreaterEqual(str(d1).find('D object at '), 0)
|
|
self.assertEqual(str(d1), repr(d1))
|
|
self.assertNotIn(-1, d1)
|
|
for i in range(10):
|
|
self.assertIn(i, d1)
|
|
self.assertNotIn(10, d1)
|
|
# Test overridden behavior
|
|
class Proxy(object):
|
|
def __init__(self, x):
|
|
self.x = x
|
|
def __bool__(self):
|
|
return not not self.x
|
|
def __hash__(self):
|
|
return hash(self.x)
|
|
def __eq__(self, other):
|
|
return self.x == other
|
|
def __ne__(self, other):
|
|
return self.x != other
|
|
def __ge__(self, other):
|
|
return self.x >= other
|
|
def __gt__(self, other):
|
|
return self.x > other
|
|
def __le__(self, other):
|
|
return self.x <= other
|
|
def __lt__(self, other):
|
|
return self.x < other
|
|
def __str__(self):
|
|
return "Proxy:%s" % self.x
|
|
def __repr__(self):
|
|
return "Proxy(%r)" % self.x
|
|
def __contains__(self, value):
|
|
return value in self.x
|
|
p0 = Proxy(0)
|
|
p1 = Proxy(1)
|
|
p_1 = Proxy(-1)
|
|
self.assertFalse(p0)
|
|
self.assertFalse(not p1)
|
|
self.assertEqual(hash(p0), hash(0))
|
|
self.assertEqual(p0, p0)
|
|
self.assertNotEqual(p0, p1)
|
|
self.assertFalse(p0 != p0)
|
|
self.assertEqual(not p0, p1)
|
|
self.assertTrue(p0 < p1)
|
|
self.assertTrue(p0 <= p1)
|
|
self.assertTrue(p1 > p0)
|
|
self.assertTrue(p1 >= p0)
|
|
self.assertEqual(str(p0), "Proxy:0")
|
|
self.assertEqual(repr(p0), "Proxy(0)")
|
|
p10 = Proxy(range(10))
|
|
self.assertNotIn(-1, p10)
|
|
for i in range(10):
|
|
self.assertIn(i, p10)
|
|
self.assertNotIn(10, p10)
|
|
|
|
def test_weakrefs(self):
|
|
# Testing weak references...
|
|
import weakref
|
|
class C(object):
|
|
pass
|
|
c = C()
|
|
r = weakref.ref(c)
|
|
self.assertEqual(r(), c)
|
|
del c
|
|
support.gc_collect()
|
|
self.assertEqual(r(), None)
|
|
del r
|
|
class NoWeak(object):
|
|
__slots__ = ['foo']
|
|
no = NoWeak()
|
|
try:
|
|
weakref.ref(no)
|
|
except TypeError as msg:
|
|
self.assertIn("weak reference", str(msg))
|
|
else:
|
|
self.fail("weakref.ref(no) should be illegal")
|
|
class Weak(object):
|
|
__slots__ = ['foo', '__weakref__']
|
|
yes = Weak()
|
|
r = weakref.ref(yes)
|
|
self.assertEqual(r(), yes)
|
|
del yes
|
|
support.gc_collect()
|
|
self.assertEqual(r(), None)
|
|
del r
|
|
|
|
def test_properties(self):
|
|
# Testing property...
|
|
class C(object):
|
|
def getx(self):
|
|
return self.__x
|
|
def setx(self, value):
|
|
self.__x = value
|
|
def delx(self):
|
|
del self.__x
|
|
x = property(getx, setx, delx, doc="I'm the x property.")
|
|
a = C()
|
|
self.assertNotHasAttr(a, "x")
|
|
a.x = 42
|
|
self.assertEqual(a._C__x, 42)
|
|
self.assertEqual(a.x, 42)
|
|
del a.x
|
|
self.assertNotHasAttr(a, "x")
|
|
self.assertNotHasAttr(a, "_C__x")
|
|
C.x.__set__(a, 100)
|
|
self.assertEqual(C.x.__get__(a), 100)
|
|
C.x.__delete__(a)
|
|
self.assertNotHasAttr(a, "x")
|
|
|
|
raw = C.__dict__['x']
|
|
self.assertIsInstance(raw, property)
|
|
|
|
attrs = dir(raw)
|
|
self.assertIn("__doc__", attrs)
|
|
self.assertIn("fget", attrs)
|
|
self.assertIn("fset", attrs)
|
|
self.assertIn("fdel", attrs)
|
|
|
|
self.assertEqual(raw.__doc__, "I'm the x property.")
|
|
self.assertIs(raw.fget, C.__dict__['getx'])
|
|
self.assertIs(raw.fset, C.__dict__['setx'])
|
|
self.assertIs(raw.fdel, C.__dict__['delx'])
|
|
|
|
for attr in "fget", "fset", "fdel":
|
|
try:
|
|
setattr(raw, attr, 42)
|
|
except AttributeError as msg:
|
|
if str(msg).find('readonly') < 0:
|
|
self.fail("when setting readonly attr %r on a property, "
|
|
"got unexpected AttributeError msg %r" % (attr, str(msg)))
|
|
else:
|
|
self.fail("expected AttributeError from trying to set readonly %r "
|
|
"attr on a property" % attr)
|
|
|
|
raw.__doc__ = 42
|
|
self.assertEqual(raw.__doc__, 42)
|
|
|
|
class D(object):
|
|
__getitem__ = property(lambda s: 1/0)
|
|
|
|
d = D()
|
|
try:
|
|
for i in d:
|
|
str(i)
|
|
except ZeroDivisionError:
|
|
pass
|
|
else:
|
|
self.fail("expected ZeroDivisionError from bad property")
|
|
|
|
@unittest.skipIf(sys.flags.optimize >= 2,
|
|
"Docstrings are omitted with -O2 and above")
|
|
def test_properties_doc_attrib(self):
|
|
class E(object):
|
|
def getter(self):
|
|
"getter method"
|
|
return 0
|
|
def setter(self_, value):
|
|
"setter method"
|
|
pass
|
|
prop = property(getter)
|
|
self.assertEqual(prop.__doc__, "getter method")
|
|
prop2 = property(fset=setter)
|
|
self.assertEqual(prop2.__doc__, None)
|
|
|
|
@support.cpython_only
|
|
def test_testcapi_no_segfault(self):
|
|
# this segfaulted in 2.5b2
|
|
try:
|
|
import _testcapi
|
|
except ImportError:
|
|
pass
|
|
else:
|
|
class X(object):
|
|
p = property(_testcapi.test_with_docstring)
|
|
|
|
def test_properties_plus(self):
|
|
class C(object):
|
|
foo = property(doc="hello")
|
|
@foo.getter
|
|
def foo(self):
|
|
return self._foo
|
|
@foo.setter
|
|
def foo(self, value):
|
|
self._foo = abs(value)
|
|
@foo.deleter
|
|
def foo(self):
|
|
del self._foo
|
|
c = C()
|
|
self.assertEqual(C.foo.__doc__, "hello")
|
|
self.assertNotHasAttr(c, "foo")
|
|
c.foo = -42
|
|
self.assertHasAttr(c, '_foo')
|
|
self.assertEqual(c._foo, 42)
|
|
self.assertEqual(c.foo, 42)
|
|
del c.foo
|
|
self.assertNotHasAttr(c, '_foo')
|
|
self.assertNotHasAttr(c, "foo")
|
|
|
|
class D(C):
|
|
@C.foo.deleter
|
|
def foo(self):
|
|
try:
|
|
del self._foo
|
|
except AttributeError:
|
|
pass
|
|
d = D()
|
|
d.foo = 24
|
|
self.assertEqual(d.foo, 24)
|
|
del d.foo
|
|
del d.foo
|
|
|
|
class E(object):
|
|
@property
|
|
def foo(self):
|
|
return self._foo
|
|
@foo.setter
|
|
def foo(self, value):
|
|
raise RuntimeError
|
|
@foo.setter
|
|
def foo(self, value):
|
|
self._foo = abs(value)
|
|
@foo.deleter
|
|
def foo(self, value=None):
|
|
del self._foo
|
|
|
|
e = E()
|
|
e.foo = -42
|
|
self.assertEqual(e.foo, 42)
|
|
del e.foo
|
|
|
|
class F(E):
|
|
@E.foo.deleter
|
|
def foo(self):
|
|
del self._foo
|
|
@foo.setter
|
|
def foo(self, value):
|
|
self._foo = max(0, value)
|
|
f = F()
|
|
f.foo = -10
|
|
self.assertEqual(f.foo, 0)
|
|
del f.foo
|
|
|
|
def test_dict_constructors(self):
|
|
# Testing dict constructor ...
|
|
d = dict()
|
|
self.assertEqual(d, {})
|
|
d = dict({})
|
|
self.assertEqual(d, {})
|
|
d = dict({1: 2, 'a': 'b'})
|
|
self.assertEqual(d, {1: 2, 'a': 'b'})
|
|
self.assertEqual(d, dict(list(d.items())))
|
|
self.assertEqual(d, dict(iter(d.items())))
|
|
d = dict({'one':1, 'two':2})
|
|
self.assertEqual(d, dict(one=1, two=2))
|
|
self.assertEqual(d, dict(**d))
|
|
self.assertEqual(d, dict({"one": 1}, two=2))
|
|
self.assertEqual(d, dict([("two", 2)], one=1))
|
|
self.assertEqual(d, dict([("one", 100), ("two", 200)], **d))
|
|
self.assertEqual(d, dict(**d))
|
|
|
|
for badarg in 0, 0, 0j, "0", [0], (0,):
|
|
try:
|
|
dict(badarg)
|
|
except TypeError:
|
|
pass
|
|
except ValueError:
|
|
if badarg == "0":
|
|
# It's a sequence, and its elements are also sequences (gotta
|
|
# love strings <wink>), but they aren't of length 2, so this
|
|
# one seemed better as a ValueError than a TypeError.
|
|
pass
|
|
else:
|
|
self.fail("no TypeError from dict(%r)" % badarg)
|
|
else:
|
|
self.fail("no TypeError from dict(%r)" % badarg)
|
|
|
|
try:
|
|
dict({}, {})
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("no TypeError from dict({}, {})")
|
|
|
|
class Mapping:
|
|
# Lacks a .keys() method; will be added later.
|
|
dict = {1:2, 3:4, 'a':1j}
|
|
|
|
try:
|
|
dict(Mapping())
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("no TypeError from dict(incomplete mapping)")
|
|
|
|
Mapping.keys = lambda self: list(self.dict.keys())
|
|
Mapping.__getitem__ = lambda self, i: self.dict[i]
|
|
d = dict(Mapping())
|
|
self.assertEqual(d, Mapping.dict)
|
|
|
|
# Init from sequence of iterable objects, each producing a 2-sequence.
|
|
class AddressBookEntry:
|
|
def __init__(self, first, last):
|
|
self.first = first
|
|
self.last = last
|
|
def __iter__(self):
|
|
return iter([self.first, self.last])
|
|
|
|
d = dict([AddressBookEntry('Tim', 'Warsaw'),
|
|
AddressBookEntry('Barry', 'Peters'),
|
|
AddressBookEntry('Tim', 'Peters'),
|
|
AddressBookEntry('Barry', 'Warsaw')])
|
|
self.assertEqual(d, {'Barry': 'Warsaw', 'Tim': 'Peters'})
|
|
|
|
d = dict(zip(range(4), range(1, 5)))
|
|
self.assertEqual(d, dict([(i, i+1) for i in range(4)]))
|
|
|
|
# Bad sequence lengths.
|
|
for bad in [('tooshort',)], [('too', 'long', 'by 1')]:
|
|
try:
|
|
dict(bad)
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
self.fail("no ValueError from dict(%r)" % bad)
|
|
|
|
def test_dir(self):
|
|
# Testing dir() ...
|
|
junk = 12
|
|
self.assertEqual(dir(), ['junk', 'self'])
|
|
del junk
|
|
|
|
# Just make sure these don't blow up!
|
|
for arg in 2, 2, 2j, 2e0, [2], "2", b"2", (2,), {2:2}, type, self.test_dir:
|
|
dir(arg)
|
|
|
|
# Test dir on new-style classes. Since these have object as a
|
|
# base class, a lot more gets sucked in.
|
|
def interesting(strings):
|
|
return [s for s in strings if not s.startswith('_')]
|
|
|
|
class C(object):
|
|
Cdata = 1
|
|
def Cmethod(self): pass
|
|
|
|
cstuff = ['Cdata', 'Cmethod']
|
|
self.assertEqual(interesting(dir(C)), cstuff)
|
|
|
|
c = C()
|
|
self.assertEqual(interesting(dir(c)), cstuff)
|
|
## self.assertIn('__self__', dir(C.Cmethod))
|
|
|
|
c.cdata = 2
|
|
c.cmethod = lambda self: 0
|
|
self.assertEqual(interesting(dir(c)), cstuff + ['cdata', 'cmethod'])
|
|
## self.assertIn('__self__', dir(c.Cmethod))
|
|
|
|
class A(C):
|
|
Adata = 1
|
|
def Amethod(self): pass
|
|
|
|
astuff = ['Adata', 'Amethod'] + cstuff
|
|
self.assertEqual(interesting(dir(A)), astuff)
|
|
## self.assertIn('__self__', dir(A.Amethod))
|
|
a = A()
|
|
self.assertEqual(interesting(dir(a)), astuff)
|
|
a.adata = 42
|
|
a.amethod = lambda self: 3
|
|
self.assertEqual(interesting(dir(a)), astuff + ['adata', 'amethod'])
|
|
## self.assertIn('__self__', dir(a.Amethod))
|
|
|
|
# Try a module subclass.
|
|
class M(type(sys)):
|
|
pass
|
|
minstance = M("m")
|
|
minstance.b = 2
|
|
minstance.a = 1
|
|
default_attributes = ['__name__', '__doc__', '__package__',
|
|
'__loader__', '__spec__']
|
|
names = [x for x in dir(minstance) if x not in default_attributes]
|
|
self.assertEqual(names, ['a', 'b'])
|
|
|
|
class M2(M):
|
|
def getdict(self):
|
|
return "Not a dict!"
|
|
__dict__ = property(getdict)
|
|
|
|
m2instance = M2("m2")
|
|
m2instance.b = 2
|
|
m2instance.a = 1
|
|
self.assertEqual(m2instance.__dict__, "Not a dict!")
|
|
try:
|
|
dir(m2instance)
|
|
except TypeError:
|
|
pass
|
|
|
|
# Two essentially featureless objects, (Ellipsis just inherits stuff
|
|
# from object.
|
|
self.assertEqual(dir(object()), dir(Ellipsis))
|
|
|
|
# Nasty test case for proxied objects
|
|
class Wrapper(object):
|
|
def __init__(self, obj):
|
|
self.__obj = obj
|
|
def __repr__(self):
|
|
return "Wrapper(%s)" % repr(self.__obj)
|
|
def __getitem__(self, key):
|
|
return Wrapper(self.__obj[key])
|
|
def __len__(self):
|
|
return len(self.__obj)
|
|
def __getattr__(self, name):
|
|
return Wrapper(getattr(self.__obj, name))
|
|
|
|
class C(object):
|
|
def __getclass(self):
|
|
return Wrapper(type(self))
|
|
__class__ = property(__getclass)
|
|
|
|
dir(C()) # This used to segfault
|
|
|
|
def test_supers(self):
|
|
# Testing super...
|
|
|
|
class A(object):
|
|
def meth(self, a):
|
|
return "A(%r)" % a
|
|
|
|
self.assertEqual(A().meth(1), "A(1)")
|
|
|
|
class B(A):
|
|
def __init__(self):
|
|
self.__super = super(B, self)
|
|
def meth(self, a):
|
|
return "B(%r)" % a + self.__super.meth(a)
|
|
|
|
self.assertEqual(B().meth(2), "B(2)A(2)")
|
|
|
|
class C(A):
|
|
def meth(self, a):
|
|
return "C(%r)" % a + self.__super.meth(a)
|
|
C._C__super = super(C)
|
|
|
|
self.assertEqual(C().meth(3), "C(3)A(3)")
|
|
|
|
class D(C, B):
|
|
def meth(self, a):
|
|
return "D(%r)" % a + super(D, self).meth(a)
|
|
|
|
self.assertEqual(D().meth(4), "D(4)C(4)B(4)A(4)")
|
|
|
|
# Test for subclassing super
|
|
|
|
class mysuper(super):
|
|
def __init__(self, *args):
|
|
return super(mysuper, self).__init__(*args)
|
|
|
|
class E(D):
|
|
def meth(self, a):
|
|
return "E(%r)" % a + mysuper(E, self).meth(a)
|
|
|
|
self.assertEqual(E().meth(5), "E(5)D(5)C(5)B(5)A(5)")
|
|
|
|
class F(E):
|
|
def meth(self, a):
|
|
s = self.__super # == mysuper(F, self)
|
|
return "F(%r)[%s]" % (a, s.__class__.__name__) + s.meth(a)
|
|
F._F__super = mysuper(F)
|
|
|
|
self.assertEqual(F().meth(6), "F(6)[mysuper]E(6)D(6)C(6)B(6)A(6)")
|
|
|
|
# Make sure certain errors are raised
|
|
|
|
try:
|
|
super(D, 42)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't allow super(D, 42)")
|
|
|
|
try:
|
|
super(D, C())
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't allow super(D, C())")
|
|
|
|
try:
|
|
super(D).__get__(12)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't allow super(D).__get__(12)")
|
|
|
|
try:
|
|
super(D).__get__(C())
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't allow super(D).__get__(C())")
|
|
|
|
# Make sure data descriptors can be overridden and accessed via super
|
|
# (new feature in Python 2.3)
|
|
|
|
class DDbase(object):
|
|
def getx(self): return 42
|
|
x = property(getx)
|
|
|
|
class DDsub(DDbase):
|
|
def getx(self): return "hello"
|
|
x = property(getx)
|
|
|
|
dd = DDsub()
|
|
self.assertEqual(dd.x, "hello")
|
|
self.assertEqual(super(DDsub, dd).x, 42)
|
|
|
|
# Ensure that super() lookup of descriptor from classmethod
|
|
# works (SF ID# 743627)
|
|
|
|
class Base(object):
|
|
aProp = property(lambda self: "foo")
|
|
|
|
class Sub(Base):
|
|
@classmethod
|
|
def test(klass):
|
|
return super(Sub,klass).aProp
|
|
|
|
self.assertEqual(Sub.test(), Base.aProp)
|
|
|
|
# Verify that super() doesn't allow keyword args
|
|
with self.assertRaises(TypeError):
|
|
super(Base, kw=1)
|
|
|
|
def test_basic_inheritance(self):
|
|
# Testing inheritance from basic types...
|
|
|
|
class hexint(int):
|
|
def __repr__(self):
|
|
return hex(self)
|
|
def __add__(self, other):
|
|
return hexint(int.__add__(self, other))
|
|
# (Note that overriding __radd__ doesn't work,
|
|
# because the int type gets first dibs.)
|
|
self.assertEqual(repr(hexint(7) + 9), "0x10")
|
|
self.assertEqual(repr(hexint(1000) + 7), "0x3ef")
|
|
a = hexint(12345)
|
|
self.assertEqual(a, 12345)
|
|
self.assertEqual(int(a), 12345)
|
|
self.assertIs(int(a).__class__, int)
|
|
self.assertEqual(hash(a), hash(12345))
|
|
self.assertIs((+a).__class__, int)
|
|
self.assertIs((a >> 0).__class__, int)
|
|
self.assertIs((a << 0).__class__, int)
|
|
self.assertIs((hexint(0) << 12).__class__, int)
|
|
self.assertIs((hexint(0) >> 12).__class__, int)
|
|
|
|
class octlong(int):
|
|
__slots__ = []
|
|
def __str__(self):
|
|
return oct(self)
|
|
def __add__(self, other):
|
|
return self.__class__(super(octlong, self).__add__(other))
|
|
__radd__ = __add__
|
|
self.assertEqual(str(octlong(3) + 5), "0o10")
|
|
# (Note that overriding __radd__ here only seems to work
|
|
# because the example uses a short int left argument.)
|
|
self.assertEqual(str(5 + octlong(3000)), "0o5675")
|
|
a = octlong(12345)
|
|
self.assertEqual(a, 12345)
|
|
self.assertEqual(int(a), 12345)
|
|
self.assertEqual(hash(a), hash(12345))
|
|
self.assertIs(int(a).__class__, int)
|
|
self.assertIs((+a).__class__, int)
|
|
self.assertIs((-a).__class__, int)
|
|
self.assertIs((-octlong(0)).__class__, int)
|
|
self.assertIs((a >> 0).__class__, int)
|
|
self.assertIs((a << 0).__class__, int)
|
|
self.assertIs((a - 0).__class__, int)
|
|
self.assertIs((a * 1).__class__, int)
|
|
self.assertIs((a ** 1).__class__, int)
|
|
self.assertIs((a // 1).__class__, int)
|
|
self.assertIs((1 * a).__class__, int)
|
|
self.assertIs((a | 0).__class__, int)
|
|
self.assertIs((a ^ 0).__class__, int)
|
|
self.assertIs((a & -1).__class__, int)
|
|
self.assertIs((octlong(0) << 12).__class__, int)
|
|
self.assertIs((octlong(0) >> 12).__class__, int)
|
|
self.assertIs(abs(octlong(0)).__class__, int)
|
|
|
|
# Because octlong overrides __add__, we can't check the absence of +0
|
|
# optimizations using octlong.
|
|
class longclone(int):
|
|
pass
|
|
a = longclone(1)
|
|
self.assertIs((a + 0).__class__, int)
|
|
self.assertIs((0 + a).__class__, int)
|
|
|
|
# Check that negative clones don't segfault
|
|
a = longclone(-1)
|
|
self.assertEqual(a.__dict__, {})
|
|
self.assertEqual(int(a), -1) # self.assertTrue PyNumber_Long() copies the sign bit
|
|
|
|
class precfloat(float):
|
|
__slots__ = ['prec']
|
|
def __init__(self, value=0.0, prec=12):
|
|
self.prec = int(prec)
|
|
def __repr__(self):
|
|
return "%.*g" % (self.prec, self)
|
|
self.assertEqual(repr(precfloat(1.1)), "1.1")
|
|
a = precfloat(12345)
|
|
self.assertEqual(a, 12345.0)
|
|
self.assertEqual(float(a), 12345.0)
|
|
self.assertIs(float(a).__class__, float)
|
|
self.assertEqual(hash(a), hash(12345.0))
|
|
self.assertIs((+a).__class__, float)
|
|
|
|
class madcomplex(complex):
|
|
def __repr__(self):
|
|
return "%.17gj%+.17g" % (self.imag, self.real)
|
|
a = madcomplex(-3, 4)
|
|
self.assertEqual(repr(a), "4j-3")
|
|
base = complex(-3, 4)
|
|
self.assertEqual(base.__class__, complex)
|
|
self.assertEqual(a, base)
|
|
self.assertEqual(complex(a), base)
|
|
self.assertEqual(complex(a).__class__, complex)
|
|
a = madcomplex(a) # just trying another form of the constructor
|
|
self.assertEqual(repr(a), "4j-3")
|
|
self.assertEqual(a, base)
|
|
self.assertEqual(complex(a), base)
|
|
self.assertEqual(complex(a).__class__, complex)
|
|
self.assertEqual(hash(a), hash(base))
|
|
self.assertEqual((+a).__class__, complex)
|
|
self.assertEqual((a + 0).__class__, complex)
|
|
self.assertEqual(a + 0, base)
|
|
self.assertEqual((a - 0).__class__, complex)
|
|
self.assertEqual(a - 0, base)
|
|
self.assertEqual((a * 1).__class__, complex)
|
|
self.assertEqual(a * 1, base)
|
|
self.assertEqual((a / 1).__class__, complex)
|
|
self.assertEqual(a / 1, base)
|
|
|
|
class madtuple(tuple):
|
|
_rev = None
|
|
def rev(self):
|
|
if self._rev is not None:
|
|
return self._rev
|
|
L = list(self)
|
|
L.reverse()
|
|
self._rev = self.__class__(L)
|
|
return self._rev
|
|
a = madtuple((1,2,3,4,5,6,7,8,9,0))
|
|
self.assertEqual(a, (1,2,3,4,5,6,7,8,9,0))
|
|
self.assertEqual(a.rev(), madtuple((0,9,8,7,6,5,4,3,2,1)))
|
|
self.assertEqual(a.rev().rev(), madtuple((1,2,3,4,5,6,7,8,9,0)))
|
|
for i in range(512):
|
|
t = madtuple(range(i))
|
|
u = t.rev()
|
|
v = u.rev()
|
|
self.assertEqual(v, t)
|
|
a = madtuple((1,2,3,4,5))
|
|
self.assertEqual(tuple(a), (1,2,3,4,5))
|
|
self.assertIs(tuple(a).__class__, tuple)
|
|
self.assertEqual(hash(a), hash((1,2,3,4,5)))
|
|
self.assertIs(a[:].__class__, tuple)
|
|
self.assertIs((a * 1).__class__, tuple)
|
|
self.assertIs((a * 0).__class__, tuple)
|
|
self.assertIs((a + ()).__class__, tuple)
|
|
a = madtuple(())
|
|
self.assertEqual(tuple(a), ())
|
|
self.assertIs(tuple(a).__class__, tuple)
|
|
self.assertIs((a + a).__class__, tuple)
|
|
self.assertIs((a * 0).__class__, tuple)
|
|
self.assertIs((a * 1).__class__, tuple)
|
|
self.assertIs((a * 2).__class__, tuple)
|
|
self.assertIs(a[:].__class__, tuple)
|
|
|
|
class madstring(str):
|
|
_rev = None
|
|
def rev(self):
|
|
if self._rev is not None:
|
|
return self._rev
|
|
L = list(self)
|
|
L.reverse()
|
|
self._rev = self.__class__("".join(L))
|
|
return self._rev
|
|
s = madstring("abcdefghijklmnopqrstuvwxyz")
|
|
self.assertEqual(s, "abcdefghijklmnopqrstuvwxyz")
|
|
self.assertEqual(s.rev(), madstring("zyxwvutsrqponmlkjihgfedcba"))
|
|
self.assertEqual(s.rev().rev(), madstring("abcdefghijklmnopqrstuvwxyz"))
|
|
for i in range(256):
|
|
s = madstring("".join(map(chr, range(i))))
|
|
t = s.rev()
|
|
u = t.rev()
|
|
self.assertEqual(u, s)
|
|
s = madstring("12345")
|
|
self.assertEqual(str(s), "12345")
|
|
self.assertIs(str(s).__class__, str)
|
|
|
|
base = "\x00" * 5
|
|
s = madstring(base)
|
|
self.assertEqual(s, base)
|
|
self.assertEqual(str(s), base)
|
|
self.assertIs(str(s).__class__, str)
|
|
self.assertEqual(hash(s), hash(base))
|
|
self.assertEqual({s: 1}[base], 1)
|
|
self.assertEqual({base: 1}[s], 1)
|
|
self.assertIs((s + "").__class__, str)
|
|
self.assertEqual(s + "", base)
|
|
self.assertIs(("" + s).__class__, str)
|
|
self.assertEqual("" + s, base)
|
|
self.assertIs((s * 0).__class__, str)
|
|
self.assertEqual(s * 0, "")
|
|
self.assertIs((s * 1).__class__, str)
|
|
self.assertEqual(s * 1, base)
|
|
self.assertIs((s * 2).__class__, str)
|
|
self.assertEqual(s * 2, base + base)
|
|
self.assertIs(s[:].__class__, str)
|
|
self.assertEqual(s[:], base)
|
|
self.assertIs(s[0:0].__class__, str)
|
|
self.assertEqual(s[0:0], "")
|
|
self.assertIs(s.strip().__class__, str)
|
|
self.assertEqual(s.strip(), base)
|
|
self.assertIs(s.lstrip().__class__, str)
|
|
self.assertEqual(s.lstrip(), base)
|
|
self.assertIs(s.rstrip().__class__, str)
|
|
self.assertEqual(s.rstrip(), base)
|
|
identitytab = {}
|
|
self.assertIs(s.translate(identitytab).__class__, str)
|
|
self.assertEqual(s.translate(identitytab), base)
|
|
self.assertIs(s.replace("x", "x").__class__, str)
|
|
self.assertEqual(s.replace("x", "x"), base)
|
|
self.assertIs(s.ljust(len(s)).__class__, str)
|
|
self.assertEqual(s.ljust(len(s)), base)
|
|
self.assertIs(s.rjust(len(s)).__class__, str)
|
|
self.assertEqual(s.rjust(len(s)), base)
|
|
self.assertIs(s.center(len(s)).__class__, str)
|
|
self.assertEqual(s.center(len(s)), base)
|
|
self.assertIs(s.lower().__class__, str)
|
|
self.assertEqual(s.lower(), base)
|
|
|
|
class madunicode(str):
|
|
_rev = None
|
|
def rev(self):
|
|
if self._rev is not None:
|
|
return self._rev
|
|
L = list(self)
|
|
L.reverse()
|
|
self._rev = self.__class__("".join(L))
|
|
return self._rev
|
|
u = madunicode("ABCDEF")
|
|
self.assertEqual(u, "ABCDEF")
|
|
self.assertEqual(u.rev(), madunicode("FEDCBA"))
|
|
self.assertEqual(u.rev().rev(), madunicode("ABCDEF"))
|
|
base = "12345"
|
|
u = madunicode(base)
|
|
self.assertEqual(str(u), base)
|
|
self.assertIs(str(u).__class__, str)
|
|
self.assertEqual(hash(u), hash(base))
|
|
self.assertEqual({u: 1}[base], 1)
|
|
self.assertEqual({base: 1}[u], 1)
|
|
self.assertIs(u.strip().__class__, str)
|
|
self.assertEqual(u.strip(), base)
|
|
self.assertIs(u.lstrip().__class__, str)
|
|
self.assertEqual(u.lstrip(), base)
|
|
self.assertIs(u.rstrip().__class__, str)
|
|
self.assertEqual(u.rstrip(), base)
|
|
self.assertIs(u.replace("x", "x").__class__, str)
|
|
self.assertEqual(u.replace("x", "x"), base)
|
|
self.assertIs(u.replace("xy", "xy").__class__, str)
|
|
self.assertEqual(u.replace("xy", "xy"), base)
|
|
self.assertIs(u.center(len(u)).__class__, str)
|
|
self.assertEqual(u.center(len(u)), base)
|
|
self.assertIs(u.ljust(len(u)).__class__, str)
|
|
self.assertEqual(u.ljust(len(u)), base)
|
|
self.assertIs(u.rjust(len(u)).__class__, str)
|
|
self.assertEqual(u.rjust(len(u)), base)
|
|
self.assertIs(u.lower().__class__, str)
|
|
self.assertEqual(u.lower(), base)
|
|
self.assertIs(u.upper().__class__, str)
|
|
self.assertEqual(u.upper(), base)
|
|
self.assertIs(u.capitalize().__class__, str)
|
|
self.assertEqual(u.capitalize(), base)
|
|
self.assertIs(u.title().__class__, str)
|
|
self.assertEqual(u.title(), base)
|
|
self.assertIs((u + "").__class__, str)
|
|
self.assertEqual(u + "", base)
|
|
self.assertIs(("" + u).__class__, str)
|
|
self.assertEqual("" + u, base)
|
|
self.assertIs((u * 0).__class__, str)
|
|
self.assertEqual(u * 0, "")
|
|
self.assertIs((u * 1).__class__, str)
|
|
self.assertEqual(u * 1, base)
|
|
self.assertIs((u * 2).__class__, str)
|
|
self.assertEqual(u * 2, base + base)
|
|
self.assertIs(u[:].__class__, str)
|
|
self.assertEqual(u[:], base)
|
|
self.assertIs(u[0:0].__class__, str)
|
|
self.assertEqual(u[0:0], "")
|
|
|
|
class sublist(list):
|
|
pass
|
|
a = sublist(range(5))
|
|
self.assertEqual(a, list(range(5)))
|
|
a.append("hello")
|
|
self.assertEqual(a, list(range(5)) + ["hello"])
|
|
a[5] = 5
|
|
self.assertEqual(a, list(range(6)))
|
|
a.extend(range(6, 20))
|
|
self.assertEqual(a, list(range(20)))
|
|
a[-5:] = []
|
|
self.assertEqual(a, list(range(15)))
|
|
del a[10:15]
|
|
self.assertEqual(len(a), 10)
|
|
self.assertEqual(a, list(range(10)))
|
|
self.assertEqual(list(a), list(range(10)))
|
|
self.assertEqual(a[0], 0)
|
|
self.assertEqual(a[9], 9)
|
|
self.assertEqual(a[-10], 0)
|
|
self.assertEqual(a[-1], 9)
|
|
self.assertEqual(a[:5], list(range(5)))
|
|
|
|
## class CountedInput(file):
|
|
## """Counts lines read by self.readline().
|
|
##
|
|
## self.lineno is the 0-based ordinal of the last line read, up to
|
|
## a maximum of one greater than the number of lines in the file.
|
|
##
|
|
## self.ateof is true if and only if the final "" line has been read,
|
|
## at which point self.lineno stops incrementing, and further calls
|
|
## to readline() continue to return "".
|
|
## """
|
|
##
|
|
## lineno = 0
|
|
## ateof = 0
|
|
## def readline(self):
|
|
## if self.ateof:
|
|
## return ""
|
|
## s = file.readline(self)
|
|
## # Next line works too.
|
|
## # s = super(CountedInput, self).readline()
|
|
## self.lineno += 1
|
|
## if s == "":
|
|
## self.ateof = 1
|
|
## return s
|
|
##
|
|
## f = file(name=os_helper.TESTFN, mode='w')
|
|
## lines = ['a\n', 'b\n', 'c\n']
|
|
## try:
|
|
## f.writelines(lines)
|
|
## f.close()
|
|
## f = CountedInput(os_helper.TESTFN)
|
|
## for (i, expected) in zip(range(1, 5) + [4], lines + 2 * [""]):
|
|
## got = f.readline()
|
|
## self.assertEqual(expected, got)
|
|
## self.assertEqual(f.lineno, i)
|
|
## self.assertEqual(f.ateof, (i > len(lines)))
|
|
## f.close()
|
|
## finally:
|
|
## try:
|
|
## f.close()
|
|
## except:
|
|
## pass
|
|
## os_helper.unlink(os_helper.TESTFN)
|
|
|
|
def test_keywords(self):
|
|
# Testing keyword args to basic type constructors ...
|
|
with self.assertRaisesRegex(TypeError, 'keyword argument'):
|
|
int(x=1)
|
|
with self.assertRaisesRegex(TypeError, 'keyword argument'):
|
|
float(x=2)
|
|
with self.assertRaisesRegex(TypeError, 'keyword argument'):
|
|
bool(x=2)
|
|
self.assertEqual(complex(imag=42, real=666), complex(666, 42))
|
|
self.assertEqual(str(object=500), '500')
|
|
self.assertEqual(str(object=b'abc', errors='strict'), 'abc')
|
|
with self.assertRaisesRegex(TypeError, 'keyword argument'):
|
|
tuple(sequence=range(3))
|
|
with self.assertRaisesRegex(TypeError, 'keyword argument'):
|
|
list(sequence=(0, 1, 2))
|
|
# note: as of Python 2.3, dict() no longer has an "items" keyword arg
|
|
|
|
for constructor in (int, float, int, complex, str, str,
|
|
tuple, list):
|
|
try:
|
|
constructor(bogus_keyword_arg=1)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("expected TypeError from bogus keyword argument to %r"
|
|
% constructor)
|
|
|
|
def test_str_subclass_as_dict_key(self):
|
|
# Testing a str subclass used as dict key ..
|
|
|
|
class cistr(str):
|
|
"""Subclass of str that computes __eq__ case-insensitively.
|
|
|
|
Also computes a hash code of the string in canonical form.
|
|
"""
|
|
|
|
def __init__(self, value):
|
|
self.canonical = value.lower()
|
|
self.hashcode = hash(self.canonical)
|
|
|
|
def __eq__(self, other):
|
|
if not isinstance(other, cistr):
|
|
other = cistr(other)
|
|
return self.canonical == other.canonical
|
|
|
|
def __hash__(self):
|
|
return self.hashcode
|
|
|
|
self.assertEqual(cistr('ABC'), 'abc')
|
|
self.assertEqual('aBc', cistr('ABC'))
|
|
self.assertEqual(str(cistr('ABC')), 'ABC')
|
|
|
|
d = {cistr('one'): 1, cistr('two'): 2, cistr('tHree'): 3}
|
|
self.assertEqual(d[cistr('one')], 1)
|
|
self.assertEqual(d[cistr('tWo')], 2)
|
|
self.assertEqual(d[cistr('THrEE')], 3)
|
|
self.assertIn(cistr('ONe'), d)
|
|
self.assertEqual(d.get(cistr('thrEE')), 3)
|
|
|
|
def test_classic_comparisons(self):
|
|
# Testing classic comparisons...
|
|
class classic:
|
|
pass
|
|
|
|
for base in (classic, int, object):
|
|
class C(base):
|
|
def __init__(self, value):
|
|
self.value = int(value)
|
|
def __eq__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value == other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value == other
|
|
return NotImplemented
|
|
def __ne__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value != other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value != other
|
|
return NotImplemented
|
|
def __lt__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value < other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value < other
|
|
return NotImplemented
|
|
def __le__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value <= other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value <= other
|
|
return NotImplemented
|
|
def __gt__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value > other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value > other
|
|
return NotImplemented
|
|
def __ge__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value >= other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value >= other
|
|
return NotImplemented
|
|
|
|
c1 = C(1)
|
|
c2 = C(2)
|
|
c3 = C(3)
|
|
self.assertEqual(c1, 1)
|
|
c = {1: c1, 2: c2, 3: c3}
|
|
for x in 1, 2, 3:
|
|
for y in 1, 2, 3:
|
|
for op in "<", "<=", "==", "!=", ">", ">=":
|
|
self.assertEqual(eval("c[x] %s c[y]" % op),
|
|
eval("x %s y" % op),
|
|
"x=%d, y=%d" % (x, y))
|
|
self.assertEqual(eval("c[x] %s y" % op),
|
|
eval("x %s y" % op),
|
|
"x=%d, y=%d" % (x, y))
|
|
self.assertEqual(eval("x %s c[y]" % op),
|
|
eval("x %s y" % op),
|
|
"x=%d, y=%d" % (x, y))
|
|
|
|
def test_rich_comparisons(self):
|
|
# Testing rich comparisons...
|
|
class Z(complex):
|
|
pass
|
|
z = Z(1)
|
|
self.assertEqual(z, 1+0j)
|
|
self.assertEqual(1+0j, z)
|
|
class ZZ(complex):
|
|
def __eq__(self, other):
|
|
try:
|
|
return abs(self - other) <= 1e-6
|
|
except:
|
|
return NotImplemented
|
|
zz = ZZ(1.0000003)
|
|
self.assertEqual(zz, 1+0j)
|
|
self.assertEqual(1+0j, zz)
|
|
|
|
class classic:
|
|
pass
|
|
for base in (classic, int, object, list):
|
|
class C(base):
|
|
def __init__(self, value):
|
|
self.value = int(value)
|
|
def __cmp__(self_, other):
|
|
self.fail("shouldn't call __cmp__")
|
|
def __eq__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value == other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value == other
|
|
return NotImplemented
|
|
def __ne__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value != other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value != other
|
|
return NotImplemented
|
|
def __lt__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value < other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value < other
|
|
return NotImplemented
|
|
def __le__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value <= other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value <= other
|
|
return NotImplemented
|
|
def __gt__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value > other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value > other
|
|
return NotImplemented
|
|
def __ge__(self, other):
|
|
if isinstance(other, C):
|
|
return self.value >= other.value
|
|
if isinstance(other, int) or isinstance(other, int):
|
|
return self.value >= other
|
|
return NotImplemented
|
|
c1 = C(1)
|
|
c2 = C(2)
|
|
c3 = C(3)
|
|
self.assertEqual(c1, 1)
|
|
c = {1: c1, 2: c2, 3: c3}
|
|
for x in 1, 2, 3:
|
|
for y in 1, 2, 3:
|
|
for op in "<", "<=", "==", "!=", ">", ">=":
|
|
self.assertEqual(eval("c[x] %s c[y]" % op),
|
|
eval("x %s y" % op),
|
|
"x=%d, y=%d" % (x, y))
|
|
self.assertEqual(eval("c[x] %s y" % op),
|
|
eval("x %s y" % op),
|
|
"x=%d, y=%d" % (x, y))
|
|
self.assertEqual(eval("x %s c[y]" % op),
|
|
eval("x %s y" % op),
|
|
"x=%d, y=%d" % (x, y))
|
|
|
|
def test_descrdoc(self):
|
|
# Testing descriptor doc strings...
|
|
from _io import FileIO
|
|
def check(descr, what):
|
|
self.assertEqual(descr.__doc__, what)
|
|
check(FileIO.closed, "True if the file is closed") # getset descriptor
|
|
check(complex.real, "the real part of a complex number") # member descriptor
|
|
|
|
def test_doc_descriptor(self):
|
|
# Testing __doc__ descriptor...
|
|
# SF bug 542984
|
|
class DocDescr(object):
|
|
def __get__(self, object, otype):
|
|
if object:
|
|
object = object.__class__.__name__ + ' instance'
|
|
if otype:
|
|
otype = otype.__name__
|
|
return 'object=%s; type=%s' % (object, otype)
|
|
class OldClass:
|
|
__doc__ = DocDescr()
|
|
class NewClass(object):
|
|
__doc__ = DocDescr()
|
|
self.assertEqual(OldClass.__doc__, 'object=None; type=OldClass')
|
|
self.assertEqual(OldClass().__doc__, 'object=OldClass instance; type=OldClass')
|
|
self.assertEqual(NewClass.__doc__, 'object=None; type=NewClass')
|
|
self.assertEqual(NewClass().__doc__, 'object=NewClass instance; type=NewClass')
|
|
|
|
def test_set_class(self):
|
|
# Testing __class__ assignment...
|
|
class C(object): pass
|
|
class D(object): pass
|
|
class E(object): pass
|
|
class F(D, E): pass
|
|
for cls in C, D, E, F:
|
|
for cls2 in C, D, E, F:
|
|
x = cls()
|
|
x.__class__ = cls2
|
|
self.assertIs(x.__class__, cls2)
|
|
x.__class__ = cls
|
|
self.assertIs(x.__class__, cls)
|
|
def cant(x, C):
|
|
try:
|
|
x.__class__ = C
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't allow %r.__class__ = %r" % (x, C))
|
|
try:
|
|
delattr(x, "__class__")
|
|
except (TypeError, AttributeError):
|
|
pass
|
|
else:
|
|
self.fail("shouldn't allow del %r.__class__" % x)
|
|
cant(C(), list)
|
|
cant(list(), C)
|
|
cant(C(), 1)
|
|
cant(C(), object)
|
|
cant(object(), list)
|
|
cant(list(), object)
|
|
class Int(int): __slots__ = []
|
|
cant(True, int)
|
|
cant(2, bool)
|
|
o = object()
|
|
cant(o, type(1))
|
|
cant(o, type(None))
|
|
del o
|
|
class G(object):
|
|
__slots__ = ["a", "b"]
|
|
class H(object):
|
|
__slots__ = ["b", "a"]
|
|
class I(object):
|
|
__slots__ = ["a", "b"]
|
|
class J(object):
|
|
__slots__ = ["c", "b"]
|
|
class K(object):
|
|
__slots__ = ["a", "b", "d"]
|
|
class L(H):
|
|
__slots__ = ["e"]
|
|
class M(I):
|
|
__slots__ = ["e"]
|
|
class N(J):
|
|
__slots__ = ["__weakref__"]
|
|
class P(J):
|
|
__slots__ = ["__dict__"]
|
|
class Q(J):
|
|
pass
|
|
class R(J):
|
|
__slots__ = ["__dict__", "__weakref__"]
|
|
|
|
for cls, cls2 in ((G, H), (G, I), (I, H), (Q, R), (R, Q)):
|
|
x = cls()
|
|
x.a = 1
|
|
x.__class__ = cls2
|
|
self.assertIs(x.__class__, cls2,
|
|
"assigning %r as __class__ for %r silently failed" % (cls2, x))
|
|
self.assertEqual(x.a, 1)
|
|
x.__class__ = cls
|
|
self.assertIs(x.__class__, cls,
|
|
"assigning %r as __class__ for %r silently failed" % (cls, x))
|
|
self.assertEqual(x.a, 1)
|
|
for cls in G, J, K, L, M, N, P, R, list, Int:
|
|
for cls2 in G, J, K, L, M, N, P, R, list, Int:
|
|
if cls is cls2:
|
|
continue
|
|
cant(cls(), cls2)
|
|
|
|
# Issue5283: when __class__ changes in __del__, the wrong
|
|
# type gets DECREF'd.
|
|
class O(object):
|
|
pass
|
|
class A(object):
|
|
def __del__(self):
|
|
self.__class__ = O
|
|
l = [A() for x in range(100)]
|
|
del l
|
|
|
|
def test_set_dict(self):
|
|
# Testing __dict__ assignment...
|
|
class C(object): pass
|
|
a = C()
|
|
a.__dict__ = {'b': 1}
|
|
self.assertEqual(a.b, 1)
|
|
def cant(x, dict):
|
|
try:
|
|
x.__dict__ = dict
|
|
except (AttributeError, TypeError):
|
|
pass
|
|
else:
|
|
self.fail("shouldn't allow %r.__dict__ = %r" % (x, dict))
|
|
cant(a, None)
|
|
cant(a, [])
|
|
cant(a, 1)
|
|
del a.__dict__ # Deleting __dict__ is allowed
|
|
|
|
class Base(object):
|
|
pass
|
|
def verify_dict_readonly(x):
|
|
"""
|
|
x has to be an instance of a class inheriting from Base.
|
|
"""
|
|
cant(x, {})
|
|
try:
|
|
del x.__dict__
|
|
except (AttributeError, TypeError):
|
|
pass
|
|
else:
|
|
self.fail("shouldn't allow del %r.__dict__" % x)
|
|
dict_descr = Base.__dict__["__dict__"]
|
|
try:
|
|
dict_descr.__set__(x, {})
|
|
except (AttributeError, TypeError):
|
|
pass
|
|
else:
|
|
self.fail("dict_descr allowed access to %r's dict" % x)
|
|
|
|
# Classes don't allow __dict__ assignment and have readonly dicts
|
|
class Meta1(type, Base):
|
|
pass
|
|
class Meta2(Base, type):
|
|
pass
|
|
class D(object, metaclass=Meta1):
|
|
pass
|
|
class E(object, metaclass=Meta2):
|
|
pass
|
|
for cls in C, D, E:
|
|
verify_dict_readonly(cls)
|
|
class_dict = cls.__dict__
|
|
try:
|
|
class_dict["spam"] = "eggs"
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("%r's __dict__ can be modified" % cls)
|
|
|
|
# Modules also disallow __dict__ assignment
|
|
class Module1(types.ModuleType, Base):
|
|
pass
|
|
class Module2(Base, types.ModuleType):
|
|
pass
|
|
for ModuleType in Module1, Module2:
|
|
mod = ModuleType("spam")
|
|
verify_dict_readonly(mod)
|
|
mod.__dict__["spam"] = "eggs"
|
|
|
|
# Exception's __dict__ can be replaced, but not deleted
|
|
# (at least not any more than regular exception's __dict__ can
|
|
# be deleted; on CPython it is not the case, whereas on PyPy they
|
|
# can, just like any other new-style instance's __dict__.)
|
|
def can_delete_dict(e):
|
|
try:
|
|
del e.__dict__
|
|
except (TypeError, AttributeError):
|
|
return False
|
|
else:
|
|
return True
|
|
class Exception1(Exception, Base):
|
|
pass
|
|
class Exception2(Base, Exception):
|
|
pass
|
|
for ExceptionType in Exception, Exception1, Exception2:
|
|
e = ExceptionType()
|
|
e.__dict__ = {"a": 1}
|
|
self.assertEqual(e.a, 1)
|
|
self.assertEqual(can_delete_dict(e), can_delete_dict(ValueError()))
|
|
|
|
def test_binary_operator_override(self):
|
|
# Testing overrides of binary operations...
|
|
class I(int):
|
|
def __repr__(self):
|
|
return "I(%r)" % int(self)
|
|
def __add__(self, other):
|
|
return I(int(self) + int(other))
|
|
__radd__ = __add__
|
|
def __pow__(self, other, mod=None):
|
|
if mod is None:
|
|
return I(pow(int(self), int(other)))
|
|
else:
|
|
return I(pow(int(self), int(other), int(mod)))
|
|
def __rpow__(self, other, mod=None):
|
|
if mod is None:
|
|
return I(pow(int(other), int(self), mod))
|
|
else:
|
|
return I(pow(int(other), int(self), int(mod)))
|
|
|
|
self.assertEqual(repr(I(1) + I(2)), "I(3)")
|
|
self.assertEqual(repr(I(1) + 2), "I(3)")
|
|
self.assertEqual(repr(1 + I(2)), "I(3)")
|
|
self.assertEqual(repr(I(2) ** I(3)), "I(8)")
|
|
self.assertEqual(repr(2 ** I(3)), "I(8)")
|
|
self.assertEqual(repr(I(2) ** 3), "I(8)")
|
|
self.assertEqual(repr(pow(I(2), I(3), I(5))), "I(3)")
|
|
class S(str):
|
|
def __eq__(self, other):
|
|
return self.lower() == other.lower()
|
|
|
|
def test_subclass_propagation(self):
|
|
# Testing propagation of slot functions to subclasses...
|
|
class A(object):
|
|
pass
|
|
class B(A):
|
|
pass
|
|
class C(A):
|
|
pass
|
|
class D(B, C):
|
|
pass
|
|
d = D()
|
|
orig_hash = hash(d) # related to id(d) in platform-dependent ways
|
|
A.__hash__ = lambda self: 42
|
|
self.assertEqual(hash(d), 42)
|
|
C.__hash__ = lambda self: 314
|
|
self.assertEqual(hash(d), 314)
|
|
B.__hash__ = lambda self: 144
|
|
self.assertEqual(hash(d), 144)
|
|
D.__hash__ = lambda self: 100
|
|
self.assertEqual(hash(d), 100)
|
|
D.__hash__ = None
|
|
self.assertRaises(TypeError, hash, d)
|
|
del D.__hash__
|
|
self.assertEqual(hash(d), 144)
|
|
B.__hash__ = None
|
|
self.assertRaises(TypeError, hash, d)
|
|
del B.__hash__
|
|
self.assertEqual(hash(d), 314)
|
|
C.__hash__ = None
|
|
self.assertRaises(TypeError, hash, d)
|
|
del C.__hash__
|
|
self.assertEqual(hash(d), 42)
|
|
A.__hash__ = None
|
|
self.assertRaises(TypeError, hash, d)
|
|
del A.__hash__
|
|
self.assertEqual(hash(d), orig_hash)
|
|
d.foo = 42
|
|
d.bar = 42
|
|
self.assertEqual(d.foo, 42)
|
|
self.assertEqual(d.bar, 42)
|
|
def __getattribute__(self, name):
|
|
if name == "foo":
|
|
return 24
|
|
return object.__getattribute__(self, name)
|
|
A.__getattribute__ = __getattribute__
|
|
self.assertEqual(d.foo, 24)
|
|
self.assertEqual(d.bar, 42)
|
|
def __getattr__(self, name):
|
|
if name in ("spam", "foo", "bar"):
|
|
return "hello"
|
|
raise AttributeError(name)
|
|
B.__getattr__ = __getattr__
|
|
self.assertEqual(d.spam, "hello")
|
|
self.assertEqual(d.foo, 24)
|
|
self.assertEqual(d.bar, 42)
|
|
del A.__getattribute__
|
|
self.assertEqual(d.foo, 42)
|
|
del d.foo
|
|
self.assertEqual(d.foo, "hello")
|
|
self.assertEqual(d.bar, 42)
|
|
del B.__getattr__
|
|
try:
|
|
d.foo
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
self.fail("d.foo should be undefined now")
|
|
|
|
# Test a nasty bug in recurse_down_subclasses()
|
|
class A(object):
|
|
pass
|
|
class B(A):
|
|
pass
|
|
del B
|
|
support.gc_collect()
|
|
A.__setitem__ = lambda *a: None # crash
|
|
|
|
def test_buffer_inheritance(self):
|
|
# Testing that buffer interface is inherited ...
|
|
|
|
import binascii
|
|
# SF bug [#470040] ParseTuple t# vs subclasses.
|
|
|
|
class MyBytes(bytes):
|
|
pass
|
|
base = b'abc'
|
|
m = MyBytes(base)
|
|
# b2a_hex uses the buffer interface to get its argument's value, via
|
|
# PyArg_ParseTuple 't#' code.
|
|
self.assertEqual(binascii.b2a_hex(m), binascii.b2a_hex(base))
|
|
|
|
class MyInt(int):
|
|
pass
|
|
m = MyInt(42)
|
|
try:
|
|
binascii.b2a_hex(m)
|
|
self.fail('subclass of int should not have a buffer interface')
|
|
except TypeError:
|
|
pass
|
|
|
|
def test_str_of_str_subclass(self):
|
|
# Testing __str__ defined in subclass of str ...
|
|
import binascii
|
|
import io
|
|
|
|
class octetstring(str):
|
|
def __str__(self):
|
|
return binascii.b2a_hex(self.encode('ascii')).decode("ascii")
|
|
def __repr__(self):
|
|
return self + " repr"
|
|
|
|
o = octetstring('A')
|
|
self.assertEqual(type(o), octetstring)
|
|
self.assertEqual(type(str(o)), str)
|
|
self.assertEqual(type(repr(o)), str)
|
|
self.assertEqual(ord(o), 0x41)
|
|
self.assertEqual(str(o), '41')
|
|
self.assertEqual(repr(o), 'A repr')
|
|
self.assertEqual(o.__str__(), '41')
|
|
self.assertEqual(o.__repr__(), 'A repr')
|
|
|
|
def test_keyword_arguments(self):
|
|
# Testing keyword arguments to __init__, __call__...
|
|
def f(a): return a
|
|
self.assertEqual(f.__call__(a=42), 42)
|
|
ba = bytearray()
|
|
bytearray.__init__(ba, 'abc\xbd\u20ac',
|
|
encoding='latin1', errors='replace')
|
|
self.assertEqual(ba, b'abc\xbd?')
|
|
|
|
def test_recursive_call(self):
|
|
# Testing recursive __call__() by setting to instance of class...
|
|
class A(object):
|
|
pass
|
|
|
|
A.__call__ = A()
|
|
try:
|
|
A()()
|
|
except RecursionError:
|
|
pass
|
|
else:
|
|
self.fail("Recursion limit should have been reached for __call__()")
|
|
|
|
def test_delete_hook(self):
|
|
# Testing __del__ hook...
|
|
log = []
|
|
class C(object):
|
|
def __del__(self):
|
|
log.append(1)
|
|
c = C()
|
|
self.assertEqual(log, [])
|
|
del c
|
|
support.gc_collect()
|
|
self.assertEqual(log, [1])
|
|
|
|
class D(object): pass
|
|
d = D()
|
|
try: del d[0]
|
|
except TypeError: pass
|
|
else: self.fail("invalid del() didn't raise TypeError")
|
|
|
|
def test_hash_inheritance(self):
|
|
# Testing hash of mutable subclasses...
|
|
|
|
class mydict(dict):
|
|
pass
|
|
d = mydict()
|
|
try:
|
|
hash(d)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("hash() of dict subclass should fail")
|
|
|
|
class mylist(list):
|
|
pass
|
|
d = mylist()
|
|
try:
|
|
hash(d)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("hash() of list subclass should fail")
|
|
|
|
def test_str_operations(self):
|
|
try: 'a' + 5
|
|
except TypeError: pass
|
|
else: self.fail("'' + 5 doesn't raise TypeError")
|
|
|
|
try: ''.split('')
|
|
except ValueError: pass
|
|
else: self.fail("''.split('') doesn't raise ValueError")
|
|
|
|
try: ''.join([0])
|
|
except TypeError: pass
|
|
else: self.fail("''.join([0]) doesn't raise TypeError")
|
|
|
|
try: ''.rindex('5')
|
|
except ValueError: pass
|
|
else: self.fail("''.rindex('5') doesn't raise ValueError")
|
|
|
|
try: '%(n)s' % None
|
|
except TypeError: pass
|
|
else: self.fail("'%(n)s' % None doesn't raise TypeError")
|
|
|
|
try: '%(n' % {}
|
|
except ValueError: pass
|
|
else: self.fail("'%(n' % {} '' doesn't raise ValueError")
|
|
|
|
try: '%*s' % ('abc')
|
|
except TypeError: pass
|
|
else: self.fail("'%*s' % ('abc') doesn't raise TypeError")
|
|
|
|
try: '%*.*s' % ('abc', 5)
|
|
except TypeError: pass
|
|
else: self.fail("'%*.*s' % ('abc', 5) doesn't raise TypeError")
|
|
|
|
try: '%s' % (1, 2)
|
|
except TypeError: pass
|
|
else: self.fail("'%s' % (1, 2) doesn't raise TypeError")
|
|
|
|
try: '%' % None
|
|
except ValueError: pass
|
|
else: self.fail("'%' % None doesn't raise ValueError")
|
|
|
|
self.assertEqual('534253'.isdigit(), 1)
|
|
self.assertEqual('534253x'.isdigit(), 0)
|
|
self.assertEqual('%c' % 5, '\x05')
|
|
self.assertEqual('%c' % '5', '5')
|
|
|
|
def test_deepcopy_recursive(self):
|
|
# Testing deepcopy of recursive objects...
|
|
class Node:
|
|
pass
|
|
a = Node()
|
|
b = Node()
|
|
a.b = b
|
|
b.a = a
|
|
z = deepcopy(a) # This blew up before
|
|
|
|
def test_uninitialized_modules(self):
|
|
# Testing uninitialized module objects...
|
|
from types import ModuleType as M
|
|
m = M.__new__(M)
|
|
str(m)
|
|
self.assertNotHasAttr(m, "__name__")
|
|
self.assertNotHasAttr(m, "__file__")
|
|
self.assertNotHasAttr(m, "foo")
|
|
self.assertFalse(m.__dict__) # None or {} are both reasonable answers
|
|
m.foo = 1
|
|
self.assertEqual(m.__dict__, {"foo": 1})
|
|
|
|
def test_funny_new(self):
|
|
# Testing __new__ returning something unexpected...
|
|
class C(object):
|
|
def __new__(cls, arg):
|
|
if isinstance(arg, str): return [1, 2, 3]
|
|
elif isinstance(arg, int): return object.__new__(D)
|
|
else: return object.__new__(cls)
|
|
class D(C):
|
|
def __init__(self, arg):
|
|
self.foo = arg
|
|
self.assertEqual(C("1"), [1, 2, 3])
|
|
self.assertEqual(D("1"), [1, 2, 3])
|
|
d = D(None)
|
|
self.assertEqual(d.foo, None)
|
|
d = C(1)
|
|
self.assertIsInstance(d, D)
|
|
self.assertEqual(d.foo, 1)
|
|
d = D(1)
|
|
self.assertIsInstance(d, D)
|
|
self.assertEqual(d.foo, 1)
|
|
|
|
class C(object):
|
|
@staticmethod
|
|
def __new__(*args):
|
|
return args
|
|
self.assertEqual(C(1, 2), (C, 1, 2))
|
|
class D(C):
|
|
pass
|
|
self.assertEqual(D(1, 2), (D, 1, 2))
|
|
|
|
class C(object):
|
|
@classmethod
|
|
def __new__(*args):
|
|
return args
|
|
self.assertEqual(C(1, 2), (C, C, 1, 2))
|
|
class D(C):
|
|
pass
|
|
self.assertEqual(D(1, 2), (D, D, 1, 2))
|
|
|
|
def test_imul_bug(self):
|
|
# Testing for __imul__ problems...
|
|
# SF bug 544647
|
|
class C(object):
|
|
def __imul__(self, other):
|
|
return (self, other)
|
|
x = C()
|
|
y = x
|
|
y *= 1.0
|
|
self.assertEqual(y, (x, 1.0))
|
|
y = x
|
|
y *= 2
|
|
self.assertEqual(y, (x, 2))
|
|
y = x
|
|
y *= 3
|
|
self.assertEqual(y, (x, 3))
|
|
y = x
|
|
y *= 1<<100
|
|
self.assertEqual(y, (x, 1<<100))
|
|
y = x
|
|
y *= None
|
|
self.assertEqual(y, (x, None))
|
|
y = x
|
|
y *= "foo"
|
|
self.assertEqual(y, (x, "foo"))
|
|
|
|
def test_copy_setstate(self):
|
|
# Testing that copy.*copy() correctly uses __setstate__...
|
|
import copy
|
|
class C(object):
|
|
def __init__(self, foo=None):
|
|
self.foo = foo
|
|
self.__foo = foo
|
|
def setfoo(self, foo=None):
|
|
self.foo = foo
|
|
def getfoo(self):
|
|
return self.__foo
|
|
def __getstate__(self):
|
|
return [self.foo]
|
|
def __setstate__(self_, lst):
|
|
self.assertEqual(len(lst), 1)
|
|
self_.__foo = self_.foo = lst[0]
|
|
a = C(42)
|
|
a.setfoo(24)
|
|
self.assertEqual(a.foo, 24)
|
|
self.assertEqual(a.getfoo(), 42)
|
|
b = copy.copy(a)
|
|
self.assertEqual(b.foo, 24)
|
|
self.assertEqual(b.getfoo(), 24)
|
|
b = copy.deepcopy(a)
|
|
self.assertEqual(b.foo, 24)
|
|
self.assertEqual(b.getfoo(), 24)
|
|
|
|
def test_slices(self):
|
|
# Testing cases with slices and overridden __getitem__ ...
|
|
|
|
# Strings
|
|
self.assertEqual("hello"[:4], "hell")
|
|
self.assertEqual("hello"[slice(4)], "hell")
|
|
self.assertEqual(str.__getitem__("hello", slice(4)), "hell")
|
|
class S(str):
|
|
def __getitem__(self, x):
|
|
return str.__getitem__(self, x)
|
|
self.assertEqual(S("hello")[:4], "hell")
|
|
self.assertEqual(S("hello")[slice(4)], "hell")
|
|
self.assertEqual(S("hello").__getitem__(slice(4)), "hell")
|
|
# Tuples
|
|
self.assertEqual((1,2,3)[:2], (1,2))
|
|
self.assertEqual((1,2,3)[slice(2)], (1,2))
|
|
self.assertEqual(tuple.__getitem__((1,2,3), slice(2)), (1,2))
|
|
class T(tuple):
|
|
def __getitem__(self, x):
|
|
return tuple.__getitem__(self, x)
|
|
self.assertEqual(T((1,2,3))[:2], (1,2))
|
|
self.assertEqual(T((1,2,3))[slice(2)], (1,2))
|
|
self.assertEqual(T((1,2,3)).__getitem__(slice(2)), (1,2))
|
|
# Lists
|
|
self.assertEqual([1,2,3][:2], [1,2])
|
|
self.assertEqual([1,2,3][slice(2)], [1,2])
|
|
self.assertEqual(list.__getitem__([1,2,3], slice(2)), [1,2])
|
|
class L(list):
|
|
def __getitem__(self, x):
|
|
return list.__getitem__(self, x)
|
|
self.assertEqual(L([1,2,3])[:2], [1,2])
|
|
self.assertEqual(L([1,2,3])[slice(2)], [1,2])
|
|
self.assertEqual(L([1,2,3]).__getitem__(slice(2)), [1,2])
|
|
# Now do lists and __setitem__
|
|
a = L([1,2,3])
|
|
a[slice(1, 3)] = [3,2]
|
|
self.assertEqual(a, [1,3,2])
|
|
a[slice(0, 2, 1)] = [3,1]
|
|
self.assertEqual(a, [3,1,2])
|
|
a.__setitem__(slice(1, 3), [2,1])
|
|
self.assertEqual(a, [3,2,1])
|
|
a.__setitem__(slice(0, 2, 1), [2,3])
|
|
self.assertEqual(a, [2,3,1])
|
|
|
|
def test_subtype_resurrection(self):
|
|
# Testing resurrection of new-style instance...
|
|
|
|
class C(object):
|
|
container = []
|
|
|
|
def __del__(self):
|
|
# resurrect the instance
|
|
C.container.append(self)
|
|
|
|
c = C()
|
|
c.attr = 42
|
|
|
|
# The most interesting thing here is whether this blows up, due to
|
|
# flawed GC tracking logic in typeobject.c's call_finalizer() (a 2.2.1
|
|
# bug).
|
|
del c
|
|
|
|
support.gc_collect()
|
|
self.assertEqual(len(C.container), 1)
|
|
|
|
# Make c mortal again, so that the test framework with -l doesn't report
|
|
# it as a leak.
|
|
del C.__del__
|
|
|
|
def test_slots_trash(self):
|
|
# Testing slot trash...
|
|
# Deallocating deeply nested slotted trash caused stack overflows
|
|
class trash(object):
|
|
__slots__ = ['x']
|
|
def __init__(self, x):
|
|
self.x = x
|
|
o = None
|
|
for i in range(50000):
|
|
o = trash(o)
|
|
del o
|
|
|
|
def test_slots_multiple_inheritance(self):
|
|
# SF bug 575229, multiple inheritance w/ slots dumps core
|
|
class A(object):
|
|
__slots__=()
|
|
class B(object):
|
|
pass
|
|
class C(A,B) :
|
|
__slots__=()
|
|
if support.check_impl_detail():
|
|
self.assertEqual(C.__basicsize__, B.__basicsize__)
|
|
self.assertHasAttr(C, '__dict__')
|
|
self.assertHasAttr(C, '__weakref__')
|
|
C().x = 2
|
|
|
|
def test_rmul(self):
|
|
# Testing correct invocation of __rmul__...
|
|
# SF patch 592646
|
|
class C(object):
|
|
def __mul__(self, other):
|
|
return "mul"
|
|
def __rmul__(self, other):
|
|
return "rmul"
|
|
a = C()
|
|
self.assertEqual(a*2, "mul")
|
|
self.assertEqual(a*2.2, "mul")
|
|
self.assertEqual(2*a, "rmul")
|
|
self.assertEqual(2.2*a, "rmul")
|
|
|
|
def test_ipow(self):
|
|
# Testing correct invocation of __ipow__...
|
|
# [SF bug 620179]
|
|
class C(object):
|
|
def __ipow__(self, other):
|
|
pass
|
|
a = C()
|
|
a **= 2
|
|
|
|
def test_ipow_returns_not_implemented(self):
|
|
class A:
|
|
def __ipow__(self, other):
|
|
return NotImplemented
|
|
|
|
class B(A):
|
|
def __rpow__(self, other):
|
|
return 1
|
|
|
|
class C(A):
|
|
def __pow__(self, other):
|
|
return 2
|
|
a = A()
|
|
b = B()
|
|
c = C()
|
|
|
|
a **= b
|
|
self.assertEqual(a, 1)
|
|
|
|
c **= b
|
|
self.assertEqual(c, 2)
|
|
|
|
def test_no_ipow(self):
|
|
class B:
|
|
def __rpow__(self, other):
|
|
return 1
|
|
|
|
a = object()
|
|
b = B()
|
|
a **= b
|
|
self.assertEqual(a, 1)
|
|
|
|
def test_ipow_exception_text(self):
|
|
x = None
|
|
with self.assertRaises(TypeError) as cm:
|
|
x **= 2
|
|
self.assertIn('unsupported operand type(s) for **=', str(cm.exception))
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
y = x ** 2
|
|
self.assertIn('unsupported operand type(s) for **', str(cm.exception))
|
|
|
|
def test_mutable_bases(self):
|
|
# Testing mutable bases...
|
|
|
|
# stuff that should work:
|
|
class C(object):
|
|
pass
|
|
class C2(object):
|
|
def __getattribute__(self, attr):
|
|
if attr == 'a':
|
|
return 2
|
|
else:
|
|
return super(C2, self).__getattribute__(attr)
|
|
def meth(self):
|
|
return 1
|
|
class D(C):
|
|
pass
|
|
class E(D):
|
|
pass
|
|
d = D()
|
|
e = E()
|
|
D.__bases__ = (C,)
|
|
D.__bases__ = (C2,)
|
|
self.assertEqual(d.meth(), 1)
|
|
self.assertEqual(e.meth(), 1)
|
|
self.assertEqual(d.a, 2)
|
|
self.assertEqual(e.a, 2)
|
|
self.assertEqual(C2.__subclasses__(), [D])
|
|
|
|
try:
|
|
del D.__bases__
|
|
except (TypeError, AttributeError):
|
|
pass
|
|
else:
|
|
self.fail("shouldn't be able to delete .__bases__")
|
|
|
|
try:
|
|
D.__bases__ = ()
|
|
except TypeError as msg:
|
|
if str(msg) == "a new-style class can't have only classic bases":
|
|
self.fail("wrong error message for .__bases__ = ()")
|
|
else:
|
|
self.fail("shouldn't be able to set .__bases__ to ()")
|
|
|
|
try:
|
|
D.__bases__ = (D,)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
# actually, we'll have crashed by here...
|
|
self.fail("shouldn't be able to create inheritance cycles")
|
|
|
|
try:
|
|
D.__bases__ = (C, C)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("didn't detect repeated base classes")
|
|
|
|
try:
|
|
D.__bases__ = (E,)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't be able to create inheritance cycles")
|
|
|
|
def test_builtin_bases(self):
|
|
# Make sure all the builtin types can have their base queried without
|
|
# segfaulting. See issue #5787.
|
|
builtin_types = [tp for tp in builtins.__dict__.values()
|
|
if isinstance(tp, type)]
|
|
for tp in builtin_types:
|
|
object.__getattribute__(tp, "__bases__")
|
|
if tp is not object:
|
|
self.assertEqual(len(tp.__bases__), 1, tp)
|
|
|
|
class L(list):
|
|
pass
|
|
|
|
class C(object):
|
|
pass
|
|
|
|
class D(C):
|
|
pass
|
|
|
|
try:
|
|
L.__bases__ = (dict,)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't turn list subclass into dict subclass")
|
|
|
|
try:
|
|
list.__bases__ = (dict,)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't be able to assign to list.__bases__")
|
|
|
|
try:
|
|
D.__bases__ = (C, list)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
assert 0, "best_base calculation found wanting"
|
|
|
|
def test_unsubclassable_types(self):
|
|
with self.assertRaises(TypeError):
|
|
class X(type(None)):
|
|
pass
|
|
with self.assertRaises(TypeError):
|
|
class X(object, type(None)):
|
|
pass
|
|
with self.assertRaises(TypeError):
|
|
class X(type(None), object):
|
|
pass
|
|
class O(object):
|
|
pass
|
|
with self.assertRaises(TypeError):
|
|
class X(O, type(None)):
|
|
pass
|
|
with self.assertRaises(TypeError):
|
|
class X(type(None), O):
|
|
pass
|
|
|
|
class X(object):
|
|
pass
|
|
with self.assertRaises(TypeError):
|
|
X.__bases__ = type(None),
|
|
with self.assertRaises(TypeError):
|
|
X.__bases__ = object, type(None)
|
|
with self.assertRaises(TypeError):
|
|
X.__bases__ = type(None), object
|
|
with self.assertRaises(TypeError):
|
|
X.__bases__ = O, type(None)
|
|
with self.assertRaises(TypeError):
|
|
X.__bases__ = type(None), O
|
|
|
|
def test_mutable_bases_with_failing_mro(self):
|
|
# Testing mutable bases with failing mro...
|
|
class WorkOnce(type):
|
|
def __new__(self, name, bases, ns):
|
|
self.flag = 0
|
|
return super(WorkOnce, self).__new__(WorkOnce, name, bases, ns)
|
|
def mro(self):
|
|
if self.flag > 0:
|
|
raise RuntimeError("bozo")
|
|
else:
|
|
self.flag += 1
|
|
return type.mro(self)
|
|
|
|
class WorkAlways(type):
|
|
def mro(self):
|
|
# this is here to make sure that .mro()s aren't called
|
|
# with an exception set (which was possible at one point).
|
|
# An error message will be printed in a debug build.
|
|
# What's a good way to test for this?
|
|
return type.mro(self)
|
|
|
|
class C(object):
|
|
pass
|
|
|
|
class C2(object):
|
|
pass
|
|
|
|
class D(C):
|
|
pass
|
|
|
|
class E(D):
|
|
pass
|
|
|
|
class F(D, metaclass=WorkOnce):
|
|
pass
|
|
|
|
class G(D, metaclass=WorkAlways):
|
|
pass
|
|
|
|
# Immediate subclasses have their mro's adjusted in alphabetical
|
|
# order, so E's will get adjusted before adjusting F's fails. We
|
|
# check here that E's gets restored.
|
|
|
|
E_mro_before = E.__mro__
|
|
D_mro_before = D.__mro__
|
|
|
|
try:
|
|
D.__bases__ = (C2,)
|
|
except RuntimeError:
|
|
self.assertEqual(E.__mro__, E_mro_before)
|
|
self.assertEqual(D.__mro__, D_mro_before)
|
|
else:
|
|
self.fail("exception not propagated")
|
|
|
|
def test_mutable_bases_catch_mro_conflict(self):
|
|
# Testing mutable bases catch mro conflict...
|
|
class A(object):
|
|
pass
|
|
|
|
class B(object):
|
|
pass
|
|
|
|
class C(A, B):
|
|
pass
|
|
|
|
class D(A, B):
|
|
pass
|
|
|
|
class E(C, D):
|
|
pass
|
|
|
|
try:
|
|
C.__bases__ = (B, A)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("didn't catch MRO conflict")
|
|
|
|
def test_mutable_names(self):
|
|
# Testing mutable names...
|
|
class C(object):
|
|
pass
|
|
|
|
# C.__module__ could be 'test_descr' or '__main__'
|
|
mod = C.__module__
|
|
|
|
C.__name__ = 'D'
|
|
self.assertEqual((C.__module__, C.__name__), (mod, 'D'))
|
|
|
|
C.__name__ = 'D.E'
|
|
self.assertEqual((C.__module__, C.__name__), (mod, 'D.E'))
|
|
|
|
def test_evil_type_name(self):
|
|
# A badly placed Py_DECREF in type_set_name led to arbitrary code
|
|
# execution while the type structure was not in a sane state, and a
|
|
# possible segmentation fault as a result. See bug #16447.
|
|
class Nasty(str):
|
|
def __del__(self):
|
|
C.__name__ = "other"
|
|
|
|
class C:
|
|
pass
|
|
|
|
C.__name__ = Nasty("abc")
|
|
C.__name__ = "normal"
|
|
|
|
def test_subclass_right_op(self):
|
|
# Testing correct dispatch of subclass overloading __r<op>__...
|
|
|
|
# This code tests various cases where right-dispatch of a subclass
|
|
# should be preferred over left-dispatch of a base class.
|
|
|
|
# Case 1: subclass of int; this tests code in abstract.c::binary_op1()
|
|
|
|
class B(int):
|
|
def __floordiv__(self, other):
|
|
return "B.__floordiv__"
|
|
def __rfloordiv__(self, other):
|
|
return "B.__rfloordiv__"
|
|
|
|
self.assertEqual(B(1) // 1, "B.__floordiv__")
|
|
self.assertEqual(1 // B(1), "B.__rfloordiv__")
|
|
|
|
# Case 2: subclass of object; this is just the baseline for case 3
|
|
|
|
class C(object):
|
|
def __floordiv__(self, other):
|
|
return "C.__floordiv__"
|
|
def __rfloordiv__(self, other):
|
|
return "C.__rfloordiv__"
|
|
|
|
self.assertEqual(C() // 1, "C.__floordiv__")
|
|
self.assertEqual(1 // C(), "C.__rfloordiv__")
|
|
|
|
# Case 3: subclass of new-style class; here it gets interesting
|
|
|
|
class D(C):
|
|
def __floordiv__(self, other):
|
|
return "D.__floordiv__"
|
|
def __rfloordiv__(self, other):
|
|
return "D.__rfloordiv__"
|
|
|
|
self.assertEqual(D() // C(), "D.__floordiv__")
|
|
self.assertEqual(C() // D(), "D.__rfloordiv__")
|
|
|
|
# Case 4: this didn't work right in 2.2.2 and 2.3a1
|
|
|
|
class E(C):
|
|
pass
|
|
|
|
self.assertEqual(E.__rfloordiv__, C.__rfloordiv__)
|
|
|
|
self.assertEqual(E() // 1, "C.__floordiv__")
|
|
self.assertEqual(1 // E(), "C.__rfloordiv__")
|
|
self.assertEqual(E() // C(), "C.__floordiv__")
|
|
self.assertEqual(C() // E(), "C.__floordiv__") # This one would fail
|
|
|
|
@support.impl_detail("testing an internal kind of method object")
|
|
def test_meth_class_get(self):
|
|
# Testing __get__ method of METH_CLASS C methods...
|
|
# Full coverage of descrobject.c::classmethod_get()
|
|
|
|
# Baseline
|
|
arg = [1, 2, 3]
|
|
res = {1: None, 2: None, 3: None}
|
|
self.assertEqual(dict.fromkeys(arg), res)
|
|
self.assertEqual({}.fromkeys(arg), res)
|
|
|
|
# Now get the descriptor
|
|
descr = dict.__dict__["fromkeys"]
|
|
|
|
# More baseline using the descriptor directly
|
|
self.assertEqual(descr.__get__(None, dict)(arg), res)
|
|
self.assertEqual(descr.__get__({})(arg), res)
|
|
|
|
# Now check various error cases
|
|
try:
|
|
descr.__get__(None, None)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't have allowed descr.__get__(None, None)")
|
|
try:
|
|
descr.__get__(42)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't have allowed descr.__get__(42)")
|
|
try:
|
|
descr.__get__(None, 42)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't have allowed descr.__get__(None, 42)")
|
|
try:
|
|
descr.__get__(None, int)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("shouldn't have allowed descr.__get__(None, int)")
|
|
|
|
def test_isinst_isclass(self):
|
|
# Testing proxy isinstance() and isclass()...
|
|
class Proxy(object):
|
|
def __init__(self, obj):
|
|
self.__obj = obj
|
|
def __getattribute__(self, name):
|
|
if name.startswith("_Proxy__"):
|
|
return object.__getattribute__(self, name)
|
|
else:
|
|
return getattr(self.__obj, name)
|
|
# Test with a classic class
|
|
class C:
|
|
pass
|
|
a = C()
|
|
pa = Proxy(a)
|
|
self.assertIsInstance(a, C) # Baseline
|
|
self.assertIsInstance(pa, C) # Test
|
|
# Test with a classic subclass
|
|
class D(C):
|
|
pass
|
|
a = D()
|
|
pa = Proxy(a)
|
|
self.assertIsInstance(a, C) # Baseline
|
|
self.assertIsInstance(pa, C) # Test
|
|
# Test with a new-style class
|
|
class C(object):
|
|
pass
|
|
a = C()
|
|
pa = Proxy(a)
|
|
self.assertIsInstance(a, C) # Baseline
|
|
self.assertIsInstance(pa, C) # Test
|
|
# Test with a new-style subclass
|
|
class D(C):
|
|
pass
|
|
a = D()
|
|
pa = Proxy(a)
|
|
self.assertIsInstance(a, C) # Baseline
|
|
self.assertIsInstance(pa, C) # Test
|
|
|
|
def test_proxy_super(self):
|
|
# Testing super() for a proxy object...
|
|
class Proxy(object):
|
|
def __init__(self, obj):
|
|
self.__obj = obj
|
|
def __getattribute__(self, name):
|
|
if name.startswith("_Proxy__"):
|
|
return object.__getattribute__(self, name)
|
|
else:
|
|
return getattr(self.__obj, name)
|
|
|
|
class B(object):
|
|
def f(self):
|
|
return "B.f"
|
|
|
|
class C(B):
|
|
def f(self):
|
|
return super(C, self).f() + "->C.f"
|
|
|
|
obj = C()
|
|
p = Proxy(obj)
|
|
self.assertEqual(C.__dict__["f"](p), "B.f->C.f")
|
|
|
|
def test_carloverre(self):
|
|
# Testing prohibition of Carlo Verre's hack...
|
|
try:
|
|
object.__setattr__(str, "foo", 42)
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("Carlo Verre __setattr__ succeeded!")
|
|
try:
|
|
object.__delattr__(str, "lower")
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("Carlo Verre __delattr__ succeeded!")
|
|
|
|
def test_carloverre_multi_inherit_valid(self):
|
|
class A(type):
|
|
def __setattr__(cls, key, value):
|
|
type.__setattr__(cls, key, value)
|
|
|
|
class B:
|
|
pass
|
|
|
|
class C(B, A):
|
|
pass
|
|
|
|
obj = C('D', (object,), {})
|
|
try:
|
|
obj.test = True
|
|
except TypeError:
|
|
self.fail("setattr through direct base types should be legal")
|
|
|
|
def test_carloverre_multi_inherit_invalid(self):
|
|
class A(type):
|
|
def __setattr__(cls, key, value):
|
|
object.__setattr__(cls, key, value) # this should fail!
|
|
|
|
class B:
|
|
pass
|
|
|
|
class C(B, A):
|
|
pass
|
|
|
|
obj = C('D', (object,), {})
|
|
try:
|
|
obj.test = True
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("setattr through indirect base types should be rejected")
|
|
|
|
def test_weakref_segfault(self):
|
|
# Testing weakref segfault...
|
|
# SF 742911
|
|
import weakref
|
|
|
|
class Provoker:
|
|
def __init__(self, referrent):
|
|
self.ref = weakref.ref(referrent)
|
|
|
|
def __del__(self):
|
|
x = self.ref()
|
|
|
|
class Oops(object):
|
|
pass
|
|
|
|
o = Oops()
|
|
o.whatever = Provoker(o)
|
|
del o
|
|
|
|
def test_wrapper_segfault(self):
|
|
# SF 927248: deeply nested wrappers could cause stack overflow
|
|
f = lambda:None
|
|
for i in range(1000000):
|
|
f = f.__call__
|
|
f = None
|
|
|
|
def test_file_fault(self):
|
|
# Testing sys.stdout is changed in getattr...
|
|
test_stdout = sys.stdout
|
|
class StdoutGuard:
|
|
def __getattr__(self, attr):
|
|
sys.stdout = sys.__stdout__
|
|
raise RuntimeError("Premature access to sys.stdout.%s" % attr)
|
|
sys.stdout = StdoutGuard()
|
|
try:
|
|
print("Oops!")
|
|
except RuntimeError:
|
|
pass
|
|
finally:
|
|
sys.stdout = test_stdout
|
|
|
|
def test_vicious_descriptor_nonsense(self):
|
|
# Testing vicious_descriptor_nonsense...
|
|
|
|
# A potential segfault spotted by Thomas Wouters in mail to
|
|
# python-dev 2003-04-17, turned into an example & fixed by Michael
|
|
# Hudson just less than four months later...
|
|
|
|
class Evil(object):
|
|
def __hash__(self):
|
|
return hash('attr')
|
|
def __eq__(self, other):
|
|
try:
|
|
del C.attr
|
|
except AttributeError:
|
|
# possible race condition
|
|
pass
|
|
return 0
|
|
|
|
class Descr(object):
|
|
def __get__(self, ob, type=None):
|
|
return 1
|
|
|
|
class C(object):
|
|
attr = Descr()
|
|
|
|
c = C()
|
|
c.__dict__[Evil()] = 0
|
|
|
|
self.assertEqual(c.attr, 1)
|
|
# this makes a crash more likely:
|
|
support.gc_collect()
|
|
self.assertNotHasAttr(c, 'attr')
|
|
|
|
def test_init(self):
|
|
# SF 1155938
|
|
class Foo(object):
|
|
def __init__(self):
|
|
return 10
|
|
try:
|
|
Foo()
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("did not test __init__() for None return")
|
|
|
|
def assertNotOrderable(self, a, b):
|
|
with self.assertRaises(TypeError):
|
|
a < b
|
|
with self.assertRaises(TypeError):
|
|
a > b
|
|
with self.assertRaises(TypeError):
|
|
a <= b
|
|
with self.assertRaises(TypeError):
|
|
a >= b
|
|
|
|
def test_method_wrapper(self):
|
|
# Testing method-wrapper objects...
|
|
# <type 'method-wrapper'> did not support any reflection before 2.5
|
|
l = []
|
|
self.assertTrue(l.__add__ == l.__add__)
|
|
self.assertFalse(l.__add__ != l.__add__)
|
|
self.assertFalse(l.__add__ == [].__add__)
|
|
self.assertTrue(l.__add__ != [].__add__)
|
|
self.assertFalse(l.__add__ == l.__mul__)
|
|
self.assertTrue(l.__add__ != l.__mul__)
|
|
self.assertNotOrderable(l.__add__, l.__add__)
|
|
self.assertEqual(l.__add__.__name__, '__add__')
|
|
self.assertIs(l.__add__.__self__, l)
|
|
self.assertIs(l.__add__.__objclass__, list)
|
|
self.assertEqual(l.__add__.__doc__, list.__add__.__doc__)
|
|
# hash([].__add__) should not be based on hash([])
|
|
hash(l.__add__)
|
|
|
|
def test_builtin_function_or_method(self):
|
|
# Not really belonging to test_descr, but introspection and
|
|
# comparison on <type 'builtin_function_or_method'> seems not
|
|
# to be tested elsewhere
|
|
l = []
|
|
self.assertTrue(l.append == l.append)
|
|
self.assertFalse(l.append != l.append)
|
|
self.assertFalse(l.append == [].append)
|
|
self.assertTrue(l.append != [].append)
|
|
self.assertFalse(l.append == l.pop)
|
|
self.assertTrue(l.append != l.pop)
|
|
self.assertNotOrderable(l.append, l.append)
|
|
self.assertEqual(l.append.__name__, 'append')
|
|
self.assertIs(l.append.__self__, l)
|
|
# self.assertIs(l.append.__objclass__, list) --- could be added?
|
|
self.assertEqual(l.append.__doc__, list.append.__doc__)
|
|
# hash([].append) should not be based on hash([])
|
|
hash(l.append)
|
|
|
|
def test_special_unbound_method_types(self):
|
|
# Testing objects of <type 'wrapper_descriptor'>...
|
|
self.assertTrue(list.__add__ == list.__add__)
|
|
self.assertFalse(list.__add__ != list.__add__)
|
|
self.assertFalse(list.__add__ == list.__mul__)
|
|
self.assertTrue(list.__add__ != list.__mul__)
|
|
self.assertNotOrderable(list.__add__, list.__add__)
|
|
self.assertEqual(list.__add__.__name__, '__add__')
|
|
self.assertIs(list.__add__.__objclass__, list)
|
|
|
|
# Testing objects of <type 'method_descriptor'>...
|
|
self.assertTrue(list.append == list.append)
|
|
self.assertFalse(list.append != list.append)
|
|
self.assertFalse(list.append == list.pop)
|
|
self.assertTrue(list.append != list.pop)
|
|
self.assertNotOrderable(list.append, list.append)
|
|
self.assertEqual(list.append.__name__, 'append')
|
|
self.assertIs(list.append.__objclass__, list)
|
|
|
|
def test_not_implemented(self):
|
|
# Testing NotImplemented...
|
|
# all binary methods should be able to return a NotImplemented
|
|
import operator
|
|
|
|
def specialmethod(self, other):
|
|
return NotImplemented
|
|
|
|
def check(expr, x, y):
|
|
try:
|
|
exec(expr, {'x': x, 'y': y, 'operator': operator})
|
|
except TypeError:
|
|
pass
|
|
else:
|
|
self.fail("no TypeError from %r" % (expr,))
|
|
|
|
N1 = sys.maxsize + 1 # might trigger OverflowErrors instead of
|
|
# TypeErrors
|
|
N2 = sys.maxsize # if sizeof(int) < sizeof(long), might trigger
|
|
# ValueErrors instead of TypeErrors
|
|
for name, expr, iexpr in [
|
|
('__add__', 'x + y', 'x += y'),
|
|
('__sub__', 'x - y', 'x -= y'),
|
|
('__mul__', 'x * y', 'x *= y'),
|
|
('__matmul__', 'x @ y', 'x @= y'),
|
|
('__truediv__', 'x / y', 'x /= y'),
|
|
('__floordiv__', 'x // y', 'x //= y'),
|
|
('__mod__', 'x % y', 'x %= y'),
|
|
('__divmod__', 'divmod(x, y)', None),
|
|
('__pow__', 'x ** y', 'x **= y'),
|
|
('__lshift__', 'x << y', 'x <<= y'),
|
|
('__rshift__', 'x >> y', 'x >>= y'),
|
|
('__and__', 'x & y', 'x &= y'),
|
|
('__or__', 'x | y', 'x |= y'),
|
|
('__xor__', 'x ^ y', 'x ^= y')]:
|
|
rname = '__r' + name[2:]
|
|
A = type('A', (), {name: specialmethod})
|
|
a = A()
|
|
check(expr, a, a)
|
|
check(expr, a, N1)
|
|
check(expr, a, N2)
|
|
if iexpr:
|
|
check(iexpr, a, a)
|
|
check(iexpr, a, N1)
|
|
check(iexpr, a, N2)
|
|
iname = '__i' + name[2:]
|
|
C = type('C', (), {iname: specialmethod})
|
|
c = C()
|
|
check(iexpr, c, a)
|
|
check(iexpr, c, N1)
|
|
check(iexpr, c, N2)
|
|
|
|
def test_assign_slice(self):
|
|
# ceval.c's assign_slice used to check for
|
|
# tp->tp_as_sequence->sq_slice instead of
|
|
# tp->tp_as_sequence->sq_ass_slice
|
|
|
|
class C(object):
|
|
def __setitem__(self, idx, value):
|
|
self.value = value
|
|
|
|
c = C()
|
|
c[1:2] = 3
|
|
self.assertEqual(c.value, 3)
|
|
|
|
def test_set_and_no_get(self):
|
|
# See
|
|
# http://mail.python.org/pipermail/python-dev/2010-January/095637.html
|
|
class Descr(object):
|
|
|
|
def __init__(self, name):
|
|
self.name = name
|
|
|
|
def __set__(self, obj, value):
|
|
obj.__dict__[self.name] = value
|
|
descr = Descr("a")
|
|
|
|
class X(object):
|
|
a = descr
|
|
|
|
x = X()
|
|
self.assertIs(x.a, descr)
|
|
x.a = 42
|
|
self.assertEqual(x.a, 42)
|
|
|
|
# Also check type_getattro for correctness.
|
|
class Meta(type):
|
|
pass
|
|
class X(metaclass=Meta):
|
|
pass
|
|
X.a = 42
|
|
Meta.a = Descr("a")
|
|
self.assertEqual(X.a, 42)
|
|
|
|
def test_getattr_hooks(self):
|
|
# issue 4230
|
|
|
|
class Descriptor(object):
|
|
counter = 0
|
|
def __get__(self, obj, objtype=None):
|
|
def getter(name):
|
|
self.counter += 1
|
|
raise AttributeError(name)
|
|
return getter
|
|
|
|
descr = Descriptor()
|
|
class A(object):
|
|
__getattribute__ = descr
|
|
class B(object):
|
|
__getattr__ = descr
|
|
class C(object):
|
|
__getattribute__ = descr
|
|
__getattr__ = descr
|
|
|
|
self.assertRaises(AttributeError, getattr, A(), "attr")
|
|
self.assertEqual(descr.counter, 1)
|
|
self.assertRaises(AttributeError, getattr, B(), "attr")
|
|
self.assertEqual(descr.counter, 2)
|
|
self.assertRaises(AttributeError, getattr, C(), "attr")
|
|
self.assertEqual(descr.counter, 4)
|
|
|
|
class EvilGetattribute(object):
|
|
# This used to segfault
|
|
def __getattr__(self, name):
|
|
raise AttributeError(name)
|
|
def __getattribute__(self, name):
|
|
del EvilGetattribute.__getattr__
|
|
for i in range(5):
|
|
gc.collect()
|
|
raise AttributeError(name)
|
|
|
|
self.assertRaises(AttributeError, getattr, EvilGetattribute(), "attr")
|
|
|
|
def test_type___getattribute__(self):
|
|
self.assertRaises(TypeError, type.__getattribute__, list, type)
|
|
|
|
def test_abstractmethods(self):
|
|
# type pretends not to have __abstractmethods__.
|
|
self.assertRaises(AttributeError, getattr, type, "__abstractmethods__")
|
|
class meta(type):
|
|
pass
|
|
self.assertRaises(AttributeError, getattr, meta, "__abstractmethods__")
|
|
class X(object):
|
|
pass
|
|
with self.assertRaises(AttributeError):
|
|
del X.__abstractmethods__
|
|
|
|
def test_proxy_call(self):
|
|
class FakeStr:
|
|
__class__ = str
|
|
|
|
fake_str = FakeStr()
|
|
# isinstance() reads __class__
|
|
self.assertIsInstance(fake_str, str)
|
|
|
|
# call a method descriptor
|
|
with self.assertRaises(TypeError):
|
|
str.split(fake_str)
|
|
|
|
# call a slot wrapper descriptor
|
|
with self.assertRaises(TypeError):
|
|
str.__add__(fake_str, "abc")
|
|
|
|
def test_repr_as_str(self):
|
|
# Issue #11603: crash or infinite loop when rebinding __str__ as
|
|
# __repr__.
|
|
class Foo:
|
|
pass
|
|
Foo.__repr__ = Foo.__str__
|
|
foo = Foo()
|
|
self.assertRaises(RecursionError, str, foo)
|
|
self.assertRaises(RecursionError, repr, foo)
|
|
|
|
def test_mixing_slot_wrappers(self):
|
|
class X(dict):
|
|
__setattr__ = dict.__setitem__
|
|
__neg__ = dict.copy
|
|
x = X()
|
|
x.y = 42
|
|
self.assertEqual(x["y"], 42)
|
|
self.assertEqual(x, -x)
|
|
|
|
def test_wrong_class_slot_wrapper(self):
|
|
# Check bpo-37619: a wrapper descriptor taken from the wrong class
|
|
# should raise an exception instead of silently being ignored
|
|
class A(int):
|
|
__eq__ = str.__eq__
|
|
__add__ = str.__add__
|
|
a = A()
|
|
with self.assertRaises(TypeError):
|
|
a == a
|
|
with self.assertRaises(TypeError):
|
|
a + a
|
|
|
|
def test_slot_shadows_class_variable(self):
|
|
with self.assertRaises(ValueError) as cm:
|
|
class X:
|
|
__slots__ = ["foo"]
|
|
foo = None
|
|
m = str(cm.exception)
|
|
self.assertEqual("'foo' in __slots__ conflicts with class variable", m)
|
|
|
|
def test_set_doc(self):
|
|
class X:
|
|
"elephant"
|
|
X.__doc__ = "banana"
|
|
self.assertEqual(X.__doc__, "banana")
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
type(list).__dict__["__doc__"].__set__(list, "blah")
|
|
self.assertIn("cannot set '__doc__' attribute of immutable type 'list'", str(cm.exception))
|
|
|
|
with self.assertRaises(TypeError) as cm:
|
|
type(X).__dict__["__doc__"].__delete__(X)
|
|
self.assertIn("cannot delete '__doc__' attribute of immutable type 'X'", str(cm.exception))
|
|
self.assertEqual(X.__doc__, "banana")
|
|
|
|
def test_qualname(self):
|
|
descriptors = [str.lower, complex.real, float.real, int.__add__]
|
|
types = ['method', 'member', 'getset', 'wrapper']
|
|
|
|
# make sure we have an example of each type of descriptor
|
|
for d, n in zip(descriptors, types):
|
|
self.assertEqual(type(d).__name__, n + '_descriptor')
|
|
|
|
for d in descriptors:
|
|
qualname = d.__objclass__.__qualname__ + '.' + d.__name__
|
|
self.assertEqual(d.__qualname__, qualname)
|
|
|
|
self.assertEqual(str.lower.__qualname__, 'str.lower')
|
|
self.assertEqual(complex.real.__qualname__, 'complex.real')
|
|
self.assertEqual(float.real.__qualname__, 'float.real')
|
|
self.assertEqual(int.__add__.__qualname__, 'int.__add__')
|
|
|
|
class X:
|
|
pass
|
|
with self.assertRaises(TypeError):
|
|
del X.__qualname__
|
|
|
|
self.assertRaises(TypeError, type.__dict__['__qualname__'].__set__,
|
|
str, 'Oink')
|
|
|
|
global Y
|
|
class Y:
|
|
class Inside:
|
|
pass
|
|
self.assertEqual(Y.__qualname__, 'Y')
|
|
self.assertEqual(Y.Inside.__qualname__, 'Y.Inside')
|
|
|
|
def test_qualname_dict(self):
|
|
ns = {'__qualname__': 'some.name'}
|
|
tp = type('Foo', (), ns)
|
|
self.assertEqual(tp.__qualname__, 'some.name')
|
|
self.assertNotIn('__qualname__', tp.__dict__)
|
|
self.assertEqual(ns, {'__qualname__': 'some.name'})
|
|
|
|
ns = {'__qualname__': 1}
|
|
self.assertRaises(TypeError, type, 'Foo', (), ns)
|
|
|
|
def test_cycle_through_dict(self):
|
|
# See bug #1469629
|
|
class X(dict):
|
|
def __init__(self):
|
|
dict.__init__(self)
|
|
self.__dict__ = self
|
|
x = X()
|
|
x.attr = 42
|
|
wr = weakref.ref(x)
|
|
del x
|
|
support.gc_collect()
|
|
self.assertIsNone(wr())
|
|
for o in gc.get_objects():
|
|
self.assertIsNot(type(o), X)
|
|
|
|
def test_object_new_and_init_with_parameters(self):
|
|
# See issue #1683368
|
|
class OverrideNeither:
|
|
pass
|
|
self.assertRaises(TypeError, OverrideNeither, 1)
|
|
self.assertRaises(TypeError, OverrideNeither, kw=1)
|
|
class OverrideNew:
|
|
def __new__(cls, foo, kw=0, *args, **kwds):
|
|
return object.__new__(cls, *args, **kwds)
|
|
class OverrideInit:
|
|
def __init__(self, foo, kw=0, *args, **kwargs):
|
|
return object.__init__(self, *args, **kwargs)
|
|
class OverrideBoth(OverrideNew, OverrideInit):
|
|
pass
|
|
for case in OverrideNew, OverrideInit, OverrideBoth:
|
|
case(1)
|
|
case(1, kw=2)
|
|
self.assertRaises(TypeError, case, 1, 2, 3)
|
|
self.assertRaises(TypeError, case, 1, 2, foo=3)
|
|
|
|
def test_subclassing_does_not_duplicate_dict_descriptors(self):
|
|
class Base:
|
|
pass
|
|
class Sub(Base):
|
|
pass
|
|
self.assertIn("__dict__", Base.__dict__)
|
|
self.assertNotIn("__dict__", Sub.__dict__)
|
|
|
|
def test_bound_method_repr(self):
|
|
class Foo:
|
|
def method(self):
|
|
pass
|
|
self.assertRegex(repr(Foo().method),
|
|
r"<bound method .*Foo\.method of <.*Foo object at .*>>")
|
|
|
|
|
|
class Base:
|
|
def method(self):
|
|
pass
|
|
class Derived1(Base):
|
|
pass
|
|
class Derived2(Base):
|
|
def method(self):
|
|
pass
|
|
base = Base()
|
|
derived1 = Derived1()
|
|
derived2 = Derived2()
|
|
super_d2 = super(Derived2, derived2)
|
|
self.assertRegex(repr(base.method),
|
|
r"<bound method .*Base\.method of <.*Base object at .*>>")
|
|
self.assertRegex(repr(derived1.method),
|
|
r"<bound method .*Base\.method of <.*Derived1 object at .*>>")
|
|
self.assertRegex(repr(derived2.method),
|
|
r"<bound method .*Derived2\.method of <.*Derived2 object at .*>>")
|
|
self.assertRegex(repr(super_d2.method),
|
|
r"<bound method .*Base\.method of <.*Derived2 object at .*>>")
|
|
|
|
class Foo:
|
|
@classmethod
|
|
def method(cls):
|
|
pass
|
|
foo = Foo()
|
|
self.assertRegex(repr(foo.method), # access via instance
|
|
r"<bound method .*Foo\.method of <class '.*Foo'>>")
|
|
self.assertRegex(repr(Foo.method), # access via the class
|
|
r"<bound method .*Foo\.method of <class '.*Foo'>>")
|
|
|
|
|
|
class MyCallable:
|
|
def __call__(self, arg):
|
|
pass
|
|
func = MyCallable() # func has no __name__ or __qualname__ attributes
|
|
instance = object()
|
|
method = types.MethodType(func, instance)
|
|
self.assertRegex(repr(method),
|
|
r"<bound method \? of <object object at .*>>")
|
|
func.__name__ = "name"
|
|
self.assertRegex(repr(method),
|
|
r"<bound method name of <object object at .*>>")
|
|
func.__qualname__ = "qualname"
|
|
self.assertRegex(repr(method),
|
|
r"<bound method qualname of <object object at .*>>")
|
|
|
|
@unittest.skipIf(_testcapi is None, 'need the _testcapi module')
|
|
def test_bpo25750(self):
|
|
# bpo-25750: calling a descriptor (implemented as built-in
|
|
# function with METH_FASTCALL) should not crash CPython if the
|
|
# descriptor deletes itself from the class.
|
|
class Descr:
|
|
__get__ = _testcapi.bad_get
|
|
|
|
class X:
|
|
descr = Descr()
|
|
def __new__(cls):
|
|
cls.descr = None
|
|
# Create this large list to corrupt some unused memory
|
|
cls.lst = [2**i for i in range(10000)]
|
|
X.descr
|
|
|
|
|
|
class DictProxyTests(unittest.TestCase):
|
|
def setUp(self):
|
|
class C(object):
|
|
def meth(self):
|
|
pass
|
|
self.C = C
|
|
|
|
@unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
|
|
'trace function introduces __local__')
|
|
def test_iter_keys(self):
|
|
# Testing dict-proxy keys...
|
|
it = self.C.__dict__.keys()
|
|
self.assertNotIsInstance(it, list)
|
|
keys = list(it)
|
|
keys.sort()
|
|
self.assertEqual(keys, ['__dict__', '__doc__', '__module__',
|
|
'__weakref__', 'meth'])
|
|
|
|
@unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
|
|
'trace function introduces __local__')
|
|
def test_iter_values(self):
|
|
# Testing dict-proxy values...
|
|
it = self.C.__dict__.values()
|
|
self.assertNotIsInstance(it, list)
|
|
values = list(it)
|
|
self.assertEqual(len(values), 5)
|
|
|
|
@unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
|
|
'trace function introduces __local__')
|
|
def test_iter_items(self):
|
|
# Testing dict-proxy iteritems...
|
|
it = self.C.__dict__.items()
|
|
self.assertNotIsInstance(it, list)
|
|
keys = [item[0] for item in it]
|
|
keys.sort()
|
|
self.assertEqual(keys, ['__dict__', '__doc__', '__module__',
|
|
'__weakref__', 'meth'])
|
|
|
|
def test_dict_type_with_metaclass(self):
|
|
# Testing type of __dict__ when metaclass set...
|
|
class B(object):
|
|
pass
|
|
class M(type):
|
|
pass
|
|
class C(metaclass=M):
|
|
# In 2.3a1, C.__dict__ was a real dict rather than a dict proxy
|
|
pass
|
|
self.assertEqual(type(C.__dict__), type(B.__dict__))
|
|
|
|
def test_repr(self):
|
|
# Testing mappingproxy.__repr__.
|
|
# We can't blindly compare with the repr of another dict as ordering
|
|
# of keys and values is arbitrary and may differ.
|
|
r = repr(self.C.__dict__)
|
|
self.assertTrue(r.startswith('mappingproxy('), r)
|
|
self.assertTrue(r.endswith(')'), r)
|
|
for k, v in self.C.__dict__.items():
|
|
self.assertIn('{!r}: {!r}'.format(k, v), r)
|
|
|
|
|
|
class PTypesLongInitTest(unittest.TestCase):
|
|
# This is in its own TestCase so that it can be run before any other tests.
|
|
def test_pytype_long_ready(self):
|
|
# Testing SF bug 551412 ...
|
|
|
|
# This dumps core when SF bug 551412 isn't fixed --
|
|
# but only when test_descr.py is run separately.
|
|
# (That can't be helped -- as soon as PyType_Ready()
|
|
# is called for PyLong_Type, the bug is gone.)
|
|
class UserLong(object):
|
|
def __pow__(self, *args):
|
|
pass
|
|
try:
|
|
pow(0, UserLong(), 0)
|
|
except:
|
|
pass
|
|
|
|
# Another segfault only when run early
|
|
# (before PyType_Ready(tuple) is called)
|
|
type.mro(tuple)
|
|
|
|
|
|
class MiscTests(unittest.TestCase):
|
|
def test_type_lookup_mro_reference(self):
|
|
# Issue #14199: _PyType_Lookup() has to keep a strong reference to
|
|
# the type MRO because it may be modified during the lookup, if
|
|
# __bases__ is set during the lookup for example.
|
|
class MyKey(object):
|
|
def __hash__(self):
|
|
return hash('mykey')
|
|
|
|
def __eq__(self, other):
|
|
X.__bases__ = (Base2,)
|
|
|
|
class Base(object):
|
|
mykey = 'from Base'
|
|
mykey2 = 'from Base'
|
|
|
|
class Base2(object):
|
|
mykey = 'from Base2'
|
|
mykey2 = 'from Base2'
|
|
|
|
X = type('X', (Base,), {MyKey(): 5})
|
|
# mykey is read from Base
|
|
self.assertEqual(X.mykey, 'from Base')
|
|
# mykey2 is read from Base2 because MyKey.__eq__ has set __bases__
|
|
self.assertEqual(X.mykey2, 'from Base2')
|
|
|
|
|
|
class PicklingTests(unittest.TestCase):
|
|
|
|
def _check_reduce(self, proto, obj, args=(), kwargs={}, state=None,
|
|
listitems=None, dictitems=None):
|
|
if proto >= 2:
|
|
reduce_value = obj.__reduce_ex__(proto)
|
|
if kwargs:
|
|
self.assertEqual(reduce_value[0], copyreg.__newobj_ex__)
|
|
self.assertEqual(reduce_value[1], (type(obj), args, kwargs))
|
|
else:
|
|
self.assertEqual(reduce_value[0], copyreg.__newobj__)
|
|
self.assertEqual(reduce_value[1], (type(obj),) + args)
|
|
self.assertEqual(reduce_value[2], state)
|
|
if listitems is not None:
|
|
self.assertListEqual(list(reduce_value[3]), listitems)
|
|
else:
|
|
self.assertIsNone(reduce_value[3])
|
|
if dictitems is not None:
|
|
self.assertDictEqual(dict(reduce_value[4]), dictitems)
|
|
else:
|
|
self.assertIsNone(reduce_value[4])
|
|
else:
|
|
base_type = type(obj).__base__
|
|
reduce_value = (copyreg._reconstructor,
|
|
(type(obj),
|
|
base_type,
|
|
None if base_type is object else base_type(obj)))
|
|
if state is not None:
|
|
reduce_value += (state,)
|
|
self.assertEqual(obj.__reduce_ex__(proto), reduce_value)
|
|
self.assertEqual(obj.__reduce__(), reduce_value)
|
|
|
|
def test_reduce(self):
|
|
protocols = range(pickle.HIGHEST_PROTOCOL + 1)
|
|
args = (-101, "spam")
|
|
kwargs = {'bacon': -201, 'fish': -301}
|
|
state = {'cheese': -401}
|
|
|
|
class C1:
|
|
def __getnewargs__(self):
|
|
return args
|
|
obj = C1()
|
|
for proto in protocols:
|
|
self._check_reduce(proto, obj, args)
|
|
|
|
for name, value in state.items():
|
|
setattr(obj, name, value)
|
|
for proto in protocols:
|
|
self._check_reduce(proto, obj, args, state=state)
|
|
|
|
class C2:
|
|
def __getnewargs__(self):
|
|
return "bad args"
|
|
obj = C2()
|
|
for proto in protocols:
|
|
if proto >= 2:
|
|
with self.assertRaises(TypeError):
|
|
obj.__reduce_ex__(proto)
|
|
|
|
class C3:
|
|
def __getnewargs_ex__(self):
|
|
return (args, kwargs)
|
|
obj = C3()
|
|
for proto in protocols:
|
|
if proto >= 2:
|
|
self._check_reduce(proto, obj, args, kwargs)
|
|
|
|
class C4:
|
|
def __getnewargs_ex__(self):
|
|
return (args, "bad dict")
|
|
class C5:
|
|
def __getnewargs_ex__(self):
|
|
return ("bad tuple", kwargs)
|
|
class C6:
|
|
def __getnewargs_ex__(self):
|
|
return ()
|
|
class C7:
|
|
def __getnewargs_ex__(self):
|
|
return "bad args"
|
|
for proto in protocols:
|
|
for cls in C4, C5, C6, C7:
|
|
obj = cls()
|
|
if proto >= 2:
|
|
with self.assertRaises((TypeError, ValueError)):
|
|
obj.__reduce_ex__(proto)
|
|
|
|
class C9:
|
|
def __getnewargs_ex__(self):
|
|
return (args, {})
|
|
obj = C9()
|
|
for proto in protocols:
|
|
self._check_reduce(proto, obj, args)
|
|
|
|
class C10:
|
|
def __getnewargs_ex__(self):
|
|
raise IndexError
|
|
obj = C10()
|
|
for proto in protocols:
|
|
if proto >= 2:
|
|
with self.assertRaises(IndexError):
|
|
obj.__reduce_ex__(proto)
|
|
|
|
class C11:
|
|
def __getstate__(self):
|
|
return state
|
|
obj = C11()
|
|
for proto in protocols:
|
|
self._check_reduce(proto, obj, state=state)
|
|
|
|
class C12:
|
|
def __getstate__(self):
|
|
return "not dict"
|
|
obj = C12()
|
|
for proto in protocols:
|
|
self._check_reduce(proto, obj, state="not dict")
|
|
|
|
class C13:
|
|
def __getstate__(self):
|
|
raise IndexError
|
|
obj = C13()
|
|
for proto in protocols:
|
|
with self.assertRaises(IndexError):
|
|
obj.__reduce_ex__(proto)
|
|
if proto < 2:
|
|
with self.assertRaises(IndexError):
|
|
obj.__reduce__()
|
|
|
|
class C14:
|
|
__slots__ = tuple(state)
|
|
def __init__(self):
|
|
for name, value in state.items():
|
|
setattr(self, name, value)
|
|
|
|
obj = C14()
|
|
for proto in protocols:
|
|
if proto >= 2:
|
|
self._check_reduce(proto, obj, state=(None, state))
|
|
else:
|
|
with self.assertRaises(TypeError):
|
|
obj.__reduce_ex__(proto)
|
|
with self.assertRaises(TypeError):
|
|
obj.__reduce__()
|
|
|
|
class C15(dict):
|
|
pass
|
|
obj = C15({"quebec": -601})
|
|
for proto in protocols:
|
|
self._check_reduce(proto, obj, dictitems=dict(obj))
|
|
|
|
class C16(list):
|
|
pass
|
|
obj = C16(["yukon"])
|
|
for proto in protocols:
|
|
self._check_reduce(proto, obj, listitems=list(obj))
|
|
|
|
def test_special_method_lookup(self):
|
|
protocols = range(pickle.HIGHEST_PROTOCOL + 1)
|
|
class Picky:
|
|
def __getstate__(self):
|
|
return {}
|
|
|
|
def __getattr__(self, attr):
|
|
if attr in ("__getnewargs__", "__getnewargs_ex__"):
|
|
raise AssertionError(attr)
|
|
return None
|
|
for protocol in protocols:
|
|
state = {} if protocol >= 2 else None
|
|
self._check_reduce(protocol, Picky(), state=state)
|
|
|
|
def _assert_is_copy(self, obj, objcopy, msg=None):
|
|
"""Utility method to verify if two objects are copies of each others.
|
|
"""
|
|
if msg is None:
|
|
msg = "{!r} is not a copy of {!r}".format(obj, objcopy)
|
|
if type(obj).__repr__ is object.__repr__:
|
|
# We have this limitation for now because we use the object's repr
|
|
# to help us verify that the two objects are copies. This allows
|
|
# us to delegate the non-generic verification logic to the objects
|
|
# themselves.
|
|
raise ValueError("object passed to _assert_is_copy must " +
|
|
"override the __repr__ method.")
|
|
self.assertIsNot(obj, objcopy, msg=msg)
|
|
self.assertIs(type(obj), type(objcopy), msg=msg)
|
|
if hasattr(obj, '__dict__'):
|
|
self.assertDictEqual(obj.__dict__, objcopy.__dict__, msg=msg)
|
|
self.assertIsNot(obj.__dict__, objcopy.__dict__, msg=msg)
|
|
if hasattr(obj, '__slots__'):
|
|
self.assertListEqual(obj.__slots__, objcopy.__slots__, msg=msg)
|
|
for slot in obj.__slots__:
|
|
self.assertEqual(
|
|
hasattr(obj, slot), hasattr(objcopy, slot), msg=msg)
|
|
self.assertEqual(getattr(obj, slot, None),
|
|
getattr(objcopy, slot, None), msg=msg)
|
|
self.assertEqual(repr(obj), repr(objcopy), msg=msg)
|
|
|
|
@staticmethod
|
|
def _generate_pickle_copiers():
|
|
"""Utility method to generate the many possible pickle configurations.
|
|
"""
|
|
class PickleCopier:
|
|
"This class copies object using pickle."
|
|
def __init__(self, proto, dumps, loads):
|
|
self.proto = proto
|
|
self.dumps = dumps
|
|
self.loads = loads
|
|
def copy(self, obj):
|
|
return self.loads(self.dumps(obj, self.proto))
|
|
def __repr__(self):
|
|
# We try to be as descriptive as possible here since this is
|
|
# the string which we will allow us to tell the pickle
|
|
# configuration we are using during debugging.
|
|
return ("PickleCopier(proto={}, dumps={}.{}, loads={}.{})"
|
|
.format(self.proto,
|
|
self.dumps.__module__, self.dumps.__qualname__,
|
|
self.loads.__module__, self.loads.__qualname__))
|
|
return (PickleCopier(*args) for args in
|
|
itertools.product(range(pickle.HIGHEST_PROTOCOL + 1),
|
|
{pickle.dumps, pickle._dumps},
|
|
{pickle.loads, pickle._loads}))
|
|
|
|
def test_pickle_slots(self):
|
|
# Tests pickling of classes with __slots__.
|
|
|
|
# Pickling of classes with __slots__ but without __getstate__ should
|
|
# fail (if using protocol 0 or 1)
|
|
global C
|
|
class C:
|
|
__slots__ = ['a']
|
|
with self.assertRaises(TypeError):
|
|
pickle.dumps(C(), 0)
|
|
|
|
global D
|
|
class D(C):
|
|
pass
|
|
with self.assertRaises(TypeError):
|
|
pickle.dumps(D(), 0)
|
|
|
|
class C:
|
|
"A class with __getstate__ and __setstate__ implemented."
|
|
__slots__ = ['a']
|
|
def __getstate__(self):
|
|
state = getattr(self, '__dict__', {}).copy()
|
|
for cls in type(self).__mro__:
|
|
for slot in cls.__dict__.get('__slots__', ()):
|
|
try:
|
|
state[slot] = getattr(self, slot)
|
|
except AttributeError:
|
|
pass
|
|
return state
|
|
def __setstate__(self, state):
|
|
for k, v in state.items():
|
|
setattr(self, k, v)
|
|
def __repr__(self):
|
|
return "%s()<%r>" % (type(self).__name__, self.__getstate__())
|
|
|
|
class D(C):
|
|
"A subclass of a class with slots."
|
|
pass
|
|
|
|
global E
|
|
class E(C):
|
|
"A subclass with an extra slot."
|
|
__slots__ = ['b']
|
|
|
|
# Now it should work
|
|
for pickle_copier in self._generate_pickle_copiers():
|
|
with self.subTest(pickle_copier=pickle_copier):
|
|
x = C()
|
|
y = pickle_copier.copy(x)
|
|
self._assert_is_copy(x, y)
|
|
|
|
x.a = 42
|
|
y = pickle_copier.copy(x)
|
|
self._assert_is_copy(x, y)
|
|
|
|
x = D()
|
|
x.a = 42
|
|
x.b = 100
|
|
y = pickle_copier.copy(x)
|
|
self._assert_is_copy(x, y)
|
|
|
|
x = E()
|
|
x.a = 42
|
|
x.b = "foo"
|
|
y = pickle_copier.copy(x)
|
|
self._assert_is_copy(x, y)
|
|
|
|
def test_reduce_copying(self):
|
|
# Tests pickling and copying new-style classes and objects.
|
|
global C1
|
|
class C1:
|
|
"The state of this class is copyable via its instance dict."
|
|
ARGS = (1, 2)
|
|
NEED_DICT_COPYING = True
|
|
def __init__(self, a, b):
|
|
super().__init__()
|
|
self.a = a
|
|
self.b = b
|
|
def __repr__(self):
|
|
return "C1(%r, %r)" % (self.a, self.b)
|
|
|
|
global C2
|
|
class C2(list):
|
|
"A list subclass copyable via __getnewargs__."
|
|
ARGS = (1, 2)
|
|
NEED_DICT_COPYING = False
|
|
def __new__(cls, a, b):
|
|
self = super().__new__(cls)
|
|
self.a = a
|
|
self.b = b
|
|
return self
|
|
def __init__(self, *args):
|
|
super().__init__()
|
|
# This helps testing that __init__ is not called during the
|
|
# unpickling process, which would cause extra appends.
|
|
self.append("cheese")
|
|
@classmethod
|
|
def __getnewargs__(cls):
|
|
return cls.ARGS
|
|
def __repr__(self):
|
|
return "C2(%r, %r)<%r>" % (self.a, self.b, list(self))
|
|
|
|
global C3
|
|
class C3(list):
|
|
"A list subclass copyable via __getstate__."
|
|
ARGS = (1, 2)
|
|
NEED_DICT_COPYING = False
|
|
def __init__(self, a, b):
|
|
self.a = a
|
|
self.b = b
|
|
# This helps testing that __init__ is not called during the
|
|
# unpickling process, which would cause extra appends.
|
|
self.append("cheese")
|
|
@classmethod
|
|
def __getstate__(cls):
|
|
return cls.ARGS
|
|
def __setstate__(self, state):
|
|
a, b = state
|
|
self.a = a
|
|
self.b = b
|
|
def __repr__(self):
|
|
return "C3(%r, %r)<%r>" % (self.a, self.b, list(self))
|
|
|
|
global C4
|
|
class C4(int):
|
|
"An int subclass copyable via __getnewargs__."
|
|
ARGS = ("hello", "world", 1)
|
|
NEED_DICT_COPYING = False
|
|
def __new__(cls, a, b, value):
|
|
self = super().__new__(cls, value)
|
|
self.a = a
|
|
self.b = b
|
|
return self
|
|
@classmethod
|
|
def __getnewargs__(cls):
|
|
return cls.ARGS
|
|
def __repr__(self):
|
|
return "C4(%r, %r)<%r>" % (self.a, self.b, int(self))
|
|
|
|
global C5
|
|
class C5(int):
|
|
"An int subclass copyable via __getnewargs_ex__."
|
|
ARGS = (1, 2)
|
|
KWARGS = {'value': 3}
|
|
NEED_DICT_COPYING = False
|
|
def __new__(cls, a, b, *, value=0):
|
|
self = super().__new__(cls, value)
|
|
self.a = a
|
|
self.b = b
|
|
return self
|
|
@classmethod
|
|
def __getnewargs_ex__(cls):
|
|
return (cls.ARGS, cls.KWARGS)
|
|
def __repr__(self):
|
|
return "C5(%r, %r)<%r>" % (self.a, self.b, int(self))
|
|
|
|
test_classes = (C1, C2, C3, C4, C5)
|
|
# Testing copying through pickle
|
|
pickle_copiers = self._generate_pickle_copiers()
|
|
for cls, pickle_copier in itertools.product(test_classes, pickle_copiers):
|
|
with self.subTest(cls=cls, pickle_copier=pickle_copier):
|
|
kwargs = getattr(cls, 'KWARGS', {})
|
|
obj = cls(*cls.ARGS, **kwargs)
|
|
proto = pickle_copier.proto
|
|
objcopy = pickle_copier.copy(obj)
|
|
self._assert_is_copy(obj, objcopy)
|
|
# For test classes that supports this, make sure we didn't go
|
|
# around the reduce protocol by simply copying the attribute
|
|
# dictionary. We clear attributes using the previous copy to
|
|
# not mutate the original argument.
|
|
if proto >= 2 and not cls.NEED_DICT_COPYING:
|
|
objcopy.__dict__.clear()
|
|
objcopy2 = pickle_copier.copy(objcopy)
|
|
self._assert_is_copy(obj, objcopy2)
|
|
|
|
# Testing copying through copy.deepcopy()
|
|
for cls in test_classes:
|
|
with self.subTest(cls=cls):
|
|
kwargs = getattr(cls, 'KWARGS', {})
|
|
obj = cls(*cls.ARGS, **kwargs)
|
|
objcopy = deepcopy(obj)
|
|
self._assert_is_copy(obj, objcopy)
|
|
# For test classes that supports this, make sure we didn't go
|
|
# around the reduce protocol by simply copying the attribute
|
|
# dictionary. We clear attributes using the previous copy to
|
|
# not mutate the original argument.
|
|
if not cls.NEED_DICT_COPYING:
|
|
objcopy.__dict__.clear()
|
|
objcopy2 = deepcopy(objcopy)
|
|
self._assert_is_copy(obj, objcopy2)
|
|
|
|
def test_issue24097(self):
|
|
# Slot name is freed inside __getattr__ and is later used.
|
|
class S(str): # Not interned
|
|
pass
|
|
class A:
|
|
__slotnames__ = [S('spam')]
|
|
def __getattr__(self, attr):
|
|
if attr == 'spam':
|
|
A.__slotnames__[:] = [S('spam')]
|
|
return 42
|
|
else:
|
|
raise AttributeError
|
|
|
|
import copyreg
|
|
expected = (copyreg.__newobj__, (A,), (None, {'spam': 42}), None, None)
|
|
self.assertEqual(A().__reduce_ex__(2), expected) # Shouldn't crash
|
|
|
|
def test_object_reduce(self):
|
|
# Issue #29914
|
|
# __reduce__() takes no arguments
|
|
object().__reduce__()
|
|
with self.assertRaises(TypeError):
|
|
object().__reduce__(0)
|
|
# __reduce_ex__() takes one integer argument
|
|
object().__reduce_ex__(0)
|
|
with self.assertRaises(TypeError):
|
|
object().__reduce_ex__()
|
|
with self.assertRaises(TypeError):
|
|
object().__reduce_ex__(None)
|
|
|
|
|
|
class SharedKeyTests(unittest.TestCase):
|
|
|
|
@support.cpython_only
|
|
def test_subclasses(self):
|
|
# Verify that subclasses can share keys (per PEP 412)
|
|
class A:
|
|
pass
|
|
class B(A):
|
|
pass
|
|
|
|
a, b = A(), B()
|
|
self.assertEqual(sys.getsizeof(vars(a)), sys.getsizeof(vars(b)))
|
|
self.assertLess(sys.getsizeof(vars(a)), sys.getsizeof({"a":1}))
|
|
# Initial hash table can contain at most 5 elements.
|
|
# Set 6 attributes to cause internal resizing.
|
|
a.x, a.y, a.z, a.w, a.v, a.u = range(6)
|
|
self.assertNotEqual(sys.getsizeof(vars(a)), sys.getsizeof(vars(b)))
|
|
a2 = A()
|
|
self.assertEqual(sys.getsizeof(vars(a)), sys.getsizeof(vars(a2)))
|
|
self.assertLess(sys.getsizeof(vars(a)), sys.getsizeof({"a":1}))
|
|
b.u, b.v, b.w, b.t, b.s, b.r = range(6)
|
|
self.assertLess(sys.getsizeof(vars(b)), sys.getsizeof({"a":1}))
|
|
|
|
|
|
class DebugHelperMeta(type):
|
|
"""
|
|
Sets default __doc__ and simplifies repr() output.
|
|
"""
|
|
def __new__(mcls, name, bases, attrs):
|
|
if attrs.get('__doc__') is None:
|
|
attrs['__doc__'] = name # helps when debugging with gdb
|
|
return type.__new__(mcls, name, bases, attrs)
|
|
def __repr__(cls):
|
|
return repr(cls.__name__)
|
|
|
|
|
|
class MroTest(unittest.TestCase):
|
|
"""
|
|
Regressions for some bugs revealed through
|
|
mcsl.mro() customization (typeobject.c: mro_internal()) and
|
|
cls.__bases__ assignment (typeobject.c: type_set_bases()).
|
|
"""
|
|
|
|
def setUp(self):
|
|
self.step = 0
|
|
self.ready = False
|
|
|
|
def step_until(self, limit):
|
|
ret = (self.step < limit)
|
|
if ret:
|
|
self.step += 1
|
|
return ret
|
|
|
|
def test_incomplete_set_bases_on_self(self):
|
|
"""
|
|
type_set_bases must be aware that type->tp_mro can be NULL.
|
|
"""
|
|
class M(DebugHelperMeta):
|
|
def mro(cls):
|
|
if self.step_until(1):
|
|
assert cls.__mro__ is None
|
|
cls.__bases__ += ()
|
|
|
|
return type.mro(cls)
|
|
|
|
class A(metaclass=M):
|
|
pass
|
|
|
|
def test_reent_set_bases_on_base(self):
|
|
"""
|
|
Deep reentrancy must not over-decref old_mro.
|
|
"""
|
|
class M(DebugHelperMeta):
|
|
def mro(cls):
|
|
if cls.__mro__ is not None and cls.__name__ == 'B':
|
|
# 4-5 steps are usually enough to make it crash somewhere
|
|
if self.step_until(10):
|
|
A.__bases__ += ()
|
|
|
|
return type.mro(cls)
|
|
|
|
class A(metaclass=M):
|
|
pass
|
|
class B(A):
|
|
pass
|
|
B.__bases__ += ()
|
|
|
|
def test_reent_set_bases_on_direct_base(self):
|
|
"""
|
|
Similar to test_reent_set_bases_on_base, but may crash differently.
|
|
"""
|
|
class M(DebugHelperMeta):
|
|
def mro(cls):
|
|
base = cls.__bases__[0]
|
|
if base is not object:
|
|
if self.step_until(5):
|
|
base.__bases__ += ()
|
|
|
|
return type.mro(cls)
|
|
|
|
class A(metaclass=M):
|
|
pass
|
|
class B(A):
|
|
pass
|
|
class C(B):
|
|
pass
|
|
|
|
def test_reent_set_bases_tp_base_cycle(self):
|
|
"""
|
|
type_set_bases must check for an inheritance cycle not only through
|
|
MRO of the type, which may be not yet updated in case of reentrance,
|
|
but also through tp_base chain, which is assigned before diving into
|
|
inner calls to mro().
|
|
|
|
Otherwise, the following snippet can loop forever:
|
|
do {
|
|
// ...
|
|
type = type->tp_base;
|
|
} while (type != NULL);
|
|
|
|
Functions that rely on tp_base (like solid_base and PyType_IsSubtype)
|
|
would not be happy in that case, causing a stack overflow.
|
|
"""
|
|
class M(DebugHelperMeta):
|
|
def mro(cls):
|
|
if self.ready:
|
|
if cls.__name__ == 'B1':
|
|
B2.__bases__ = (B1,)
|
|
if cls.__name__ == 'B2':
|
|
B1.__bases__ = (B2,)
|
|
return type.mro(cls)
|
|
|
|
class A(metaclass=M):
|
|
pass
|
|
class B1(A):
|
|
pass
|
|
class B2(A):
|
|
pass
|
|
|
|
self.ready = True
|
|
with self.assertRaises(TypeError):
|
|
B1.__bases__ += ()
|
|
|
|
def test_tp_subclasses_cycle_in_update_slots(self):
|
|
"""
|
|
type_set_bases must check for reentrancy upon finishing its job
|
|
by updating tp_subclasses of old/new bases of the type.
|
|
Otherwise, an implicit inheritance cycle through tp_subclasses
|
|
can break functions that recurse on elements of that field
|
|
(like recurse_down_subclasses and mro_hierarchy) eventually
|
|
leading to a stack overflow.
|
|
"""
|
|
class M(DebugHelperMeta):
|
|
def mro(cls):
|
|
if self.ready and cls.__name__ == 'C':
|
|
self.ready = False
|
|
C.__bases__ = (B2,)
|
|
return type.mro(cls)
|
|
|
|
class A(metaclass=M):
|
|
pass
|
|
class B1(A):
|
|
pass
|
|
class B2(A):
|
|
pass
|
|
class C(A):
|
|
pass
|
|
|
|
self.ready = True
|
|
C.__bases__ = (B1,)
|
|
B1.__bases__ = (C,)
|
|
|
|
self.assertEqual(C.__bases__, (B2,))
|
|
self.assertEqual(B2.__subclasses__(), [C])
|
|
self.assertEqual(B1.__subclasses__(), [])
|
|
|
|
self.assertEqual(B1.__bases__, (C,))
|
|
self.assertEqual(C.__subclasses__(), [B1])
|
|
|
|
def test_tp_subclasses_cycle_error_return_path(self):
|
|
"""
|
|
The same as test_tp_subclasses_cycle_in_update_slots, but tests
|
|
a code path executed on error (goto bail).
|
|
"""
|
|
class E(Exception):
|
|
pass
|
|
class M(DebugHelperMeta):
|
|
def mro(cls):
|
|
if self.ready and cls.__name__ == 'C':
|
|
if C.__bases__ == (B2,):
|
|
self.ready = False
|
|
else:
|
|
C.__bases__ = (B2,)
|
|
raise E
|
|
return type.mro(cls)
|
|
|
|
class A(metaclass=M):
|
|
pass
|
|
class B1(A):
|
|
pass
|
|
class B2(A):
|
|
pass
|
|
class C(A):
|
|
pass
|
|
|
|
self.ready = True
|
|
with self.assertRaises(E):
|
|
C.__bases__ = (B1,)
|
|
B1.__bases__ = (C,)
|
|
|
|
self.assertEqual(C.__bases__, (B2,))
|
|
self.assertEqual(C.__mro__, tuple(type.mro(C)))
|
|
|
|
def test_incomplete_extend(self):
|
|
"""
|
|
Extending an unitialized type with type->tp_mro == NULL must
|
|
throw a reasonable TypeError exception, instead of failing
|
|
with PyErr_BadInternalCall.
|
|
"""
|
|
class M(DebugHelperMeta):
|
|
def mro(cls):
|
|
if cls.__mro__ is None and cls.__name__ != 'X':
|
|
with self.assertRaises(TypeError):
|
|
class X(cls):
|
|
pass
|
|
|
|
return type.mro(cls)
|
|
|
|
class A(metaclass=M):
|
|
pass
|
|
|
|
def test_incomplete_super(self):
|
|
"""
|
|
Attrubute lookup on a super object must be aware that
|
|
its target type can be uninitialized (type->tp_mro == NULL).
|
|
"""
|
|
class M(DebugHelperMeta):
|
|
def mro(cls):
|
|
if cls.__mro__ is None:
|
|
with self.assertRaises(AttributeError):
|
|
super(cls, cls).xxx
|
|
|
|
return type.mro(cls)
|
|
|
|
class A(metaclass=M):
|
|
pass
|
|
|
|
|
|
def test_main():
|
|
# Run all local test cases, with PTypesLongInitTest first.
|
|
support.run_unittest(PTypesLongInitTest, OperatorsTest,
|
|
ClassPropertiesAndMethods, DictProxyTests,
|
|
MiscTests, PicklingTests, SharedKeyTests,
|
|
MroTest)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|