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09a7c72cad
in order to make algorithmic complexity attacks on (e.g.) web apps much more complicated. The environment variable PYTHONHASHSEED and the new command line flag -R control this behavior.
658 lines
22 KiB
Python
658 lines
22 KiB
Python
# tests common to dict and UserDict
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import unittest
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import collections
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class BasicTestMappingProtocol(unittest.TestCase):
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# This base class can be used to check that an object conforms to the
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# mapping protocol
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# Functions that can be useful to override to adapt to dictionary
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# semantics
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type2test = None # which class is being tested (overwrite in subclasses)
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def _reference(self):
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"""Return a dictionary of values which are invariant by storage
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in the object under test."""
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return {"1": "2", "key1":"value1", "key2":(1,2,3)}
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def _empty_mapping(self):
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"""Return an empty mapping object"""
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return self.type2test()
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def _full_mapping(self, data):
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"""Return a mapping object with the value contained in data
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dictionary"""
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x = self._empty_mapping()
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for key, value in data.items():
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x[key] = value
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return x
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def __init__(self, *args, **kw):
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unittest.TestCase.__init__(self, *args, **kw)
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self.reference = self._reference().copy()
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# A (key, value) pair not in the mapping
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key, value = self.reference.popitem()
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self.other = {key:value}
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# A (key, value) pair in the mapping
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key, value = self.reference.popitem()
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self.inmapping = {key:value}
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self.reference[key] = value
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def test_read(self):
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# Test for read only operations on mapping
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p = self._empty_mapping()
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p1 = dict(p) #workaround for singleton objects
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d = self._full_mapping(self.reference)
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if d is p:
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p = p1
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#Indexing
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for key, value in self.reference.items():
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self.assertEqual(d[key], value)
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knownkey = list(self.other.keys())[0]
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self.assertRaises(KeyError, lambda:d[knownkey])
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#len
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self.assertEqual(len(p), 0)
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self.assertEqual(len(d), len(self.reference))
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#__contains__
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for k in self.reference:
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self.assertIn(k, d)
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for k in self.other:
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self.assertNotIn(k, d)
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#cmp
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self.assertEqual(p, p)
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self.assertEqual(d, d)
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self.assertNotEqual(p, d)
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self.assertNotEqual(d, p)
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#__non__zero__
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if p: self.fail("Empty mapping must compare to False")
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if not d: self.fail("Full mapping must compare to True")
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# keys(), items(), iterkeys() ...
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def check_iterandlist(iter, lst, ref):
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self.assertTrue(hasattr(iter, '__next__'))
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self.assertTrue(hasattr(iter, '__iter__'))
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x = list(iter)
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self.assertTrue(set(x)==set(lst)==set(ref))
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check_iterandlist(iter(d.keys()), list(d.keys()),
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self.reference.keys())
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check_iterandlist(iter(d), list(d.keys()), self.reference.keys())
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check_iterandlist(iter(d.values()), list(d.values()),
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self.reference.values())
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check_iterandlist(iter(d.items()), list(d.items()),
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self.reference.items())
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#get
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key, value = next(iter(d.items()))
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knownkey, knownvalue = next(iter(self.other.items()))
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self.assertEqual(d.get(key, knownvalue), value)
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self.assertEqual(d.get(knownkey, knownvalue), knownvalue)
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self.assertNotIn(knownkey, d)
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def test_write(self):
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# Test for write operations on mapping
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p = self._empty_mapping()
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#Indexing
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for key, value in self.reference.items():
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p[key] = value
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self.assertEqual(p[key], value)
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for key in self.reference.keys():
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del p[key]
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self.assertRaises(KeyError, lambda:p[key])
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p = self._empty_mapping()
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#update
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p.update(self.reference)
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self.assertEqual(dict(p), self.reference)
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items = list(p.items())
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p = self._empty_mapping()
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p.update(items)
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self.assertEqual(dict(p), self.reference)
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d = self._full_mapping(self.reference)
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#setdefault
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key, value = next(iter(d.items()))
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knownkey, knownvalue = next(iter(self.other.items()))
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self.assertEqual(d.setdefault(key, knownvalue), value)
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self.assertEqual(d[key], value)
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self.assertEqual(d.setdefault(knownkey, knownvalue), knownvalue)
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self.assertEqual(d[knownkey], knownvalue)
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#pop
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self.assertEqual(d.pop(knownkey), knownvalue)
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self.assertNotIn(knownkey, d)
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self.assertRaises(KeyError, d.pop, knownkey)
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default = 909
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d[knownkey] = knownvalue
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self.assertEqual(d.pop(knownkey, default), knownvalue)
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self.assertNotIn(knownkey, d)
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self.assertEqual(d.pop(knownkey, default), default)
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#popitem
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key, value = d.popitem()
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self.assertNotIn(key, d)
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self.assertEqual(value, self.reference[key])
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p=self._empty_mapping()
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self.assertRaises(KeyError, p.popitem)
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def test_constructor(self):
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self.assertEqual(self._empty_mapping(), self._empty_mapping())
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def test_bool(self):
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self.assertTrue(not self._empty_mapping())
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self.assertTrue(self.reference)
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self.assertTrue(bool(self._empty_mapping()) is False)
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self.assertTrue(bool(self.reference) is True)
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def test_keys(self):
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d = self._empty_mapping()
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self.assertEqual(list(d.keys()), [])
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d = self.reference
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self.assertIn(list(self.inmapping.keys())[0], d.keys())
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self.assertNotIn(list(self.other.keys())[0], d.keys())
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self.assertRaises(TypeError, d.keys, None)
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def test_values(self):
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d = self._empty_mapping()
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self.assertEqual(list(d.values()), [])
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self.assertRaises(TypeError, d.values, None)
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def test_items(self):
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d = self._empty_mapping()
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self.assertEqual(list(d.items()), [])
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self.assertRaises(TypeError, d.items, None)
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def test_len(self):
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d = self._empty_mapping()
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self.assertEqual(len(d), 0)
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def test_getitem(self):
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d = self.reference
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self.assertEqual(d[list(self.inmapping.keys())[0]],
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list(self.inmapping.values())[0])
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self.assertRaises(TypeError, d.__getitem__)
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def test_update(self):
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# mapping argument
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d = self._empty_mapping()
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d.update(self.other)
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self.assertEqual(list(d.items()), list(self.other.items()))
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# No argument
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d = self._empty_mapping()
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d.update()
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self.assertEqual(d, self._empty_mapping())
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# item sequence
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d = self._empty_mapping()
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d.update(self.other.items())
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self.assertEqual(list(d.items()), list(self.other.items()))
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# Iterator
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d = self._empty_mapping()
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d.update(self.other.items())
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self.assertEqual(list(d.items()), list(self.other.items()))
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# FIXME: Doesn't work with UserDict
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# self.assertRaises((TypeError, AttributeError), d.update, None)
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self.assertRaises((TypeError, AttributeError), d.update, 42)
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outerself = self
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class SimpleUserDict:
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def __init__(self):
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self.d = outerself.reference
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def keys(self):
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return self.d.keys()
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def __getitem__(self, i):
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return self.d[i]
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d.clear()
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d.update(SimpleUserDict())
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i1 = sorted(d.items())
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i2 = sorted(self.reference.items())
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self.assertEqual(i1, i2)
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class Exc(Exception): pass
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d = self._empty_mapping()
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class FailingUserDict:
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def keys(self):
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raise Exc
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self.assertRaises(Exc, d.update, FailingUserDict())
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d.clear()
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class FailingUserDict:
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def keys(self):
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class BogonIter:
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def __init__(self):
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self.i = 1
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def __iter__(self):
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return self
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def __next__(self):
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if self.i:
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self.i = 0
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return 'a'
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raise Exc
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return BogonIter()
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def __getitem__(self, key):
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return key
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self.assertRaises(Exc, d.update, FailingUserDict())
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class FailingUserDict:
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def keys(self):
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class BogonIter:
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def __init__(self):
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self.i = ord('a')
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def __iter__(self):
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return self
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def __next__(self):
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if self.i <= ord('z'):
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rtn = chr(self.i)
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self.i += 1
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return rtn
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raise StopIteration
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return BogonIter()
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def __getitem__(self, key):
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raise Exc
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self.assertRaises(Exc, d.update, FailingUserDict())
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d = self._empty_mapping()
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class badseq(object):
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def __iter__(self):
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return self
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def __next__(self):
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raise Exc()
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self.assertRaises(Exc, d.update, badseq())
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self.assertRaises(ValueError, d.update, [(1, 2, 3)])
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# no test_fromkeys or test_copy as both os.environ and selves don't support it
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def test_get(self):
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d = self._empty_mapping()
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self.assertTrue(d.get(list(self.other.keys())[0]) is None)
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self.assertEqual(d.get(list(self.other.keys())[0], 3), 3)
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d = self.reference
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self.assertTrue(d.get(list(self.other.keys())[0]) is None)
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self.assertEqual(d.get(list(self.other.keys())[0], 3), 3)
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self.assertEqual(d.get(list(self.inmapping.keys())[0]),
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list(self.inmapping.values())[0])
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self.assertEqual(d.get(list(self.inmapping.keys())[0], 3),
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list(self.inmapping.values())[0])
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self.assertRaises(TypeError, d.get)
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self.assertRaises(TypeError, d.get, None, None, None)
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def test_setdefault(self):
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d = self._empty_mapping()
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self.assertRaises(TypeError, d.setdefault)
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def test_popitem(self):
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d = self._empty_mapping()
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self.assertRaises(KeyError, d.popitem)
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self.assertRaises(TypeError, d.popitem, 42)
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def test_pop(self):
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d = self._empty_mapping()
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k, v = list(self.inmapping.items())[0]
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d[k] = v
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self.assertRaises(KeyError, d.pop, list(self.other.keys())[0])
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self.assertEqual(d.pop(k), v)
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self.assertEqual(len(d), 0)
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self.assertRaises(KeyError, d.pop, k)
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class TestMappingProtocol(BasicTestMappingProtocol):
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def test_constructor(self):
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BasicTestMappingProtocol.test_constructor(self)
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self.assertTrue(self._empty_mapping() is not self._empty_mapping())
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self.assertEqual(self.type2test(x=1, y=2), {"x": 1, "y": 2})
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def test_bool(self):
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BasicTestMappingProtocol.test_bool(self)
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self.assertTrue(not self._empty_mapping())
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self.assertTrue(self._full_mapping({"x": "y"}))
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self.assertTrue(bool(self._empty_mapping()) is False)
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self.assertTrue(bool(self._full_mapping({"x": "y"})) is True)
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def test_keys(self):
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BasicTestMappingProtocol.test_keys(self)
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d = self._empty_mapping()
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self.assertEqual(list(d.keys()), [])
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d = self._full_mapping({'a': 1, 'b': 2})
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k = d.keys()
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self.assertIn('a', k)
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self.assertIn('b', k)
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self.assertNotIn('c', k)
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def test_values(self):
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BasicTestMappingProtocol.test_values(self)
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d = self._full_mapping({1:2})
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self.assertEqual(list(d.values()), [2])
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def test_items(self):
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BasicTestMappingProtocol.test_items(self)
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d = self._full_mapping({1:2})
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self.assertEqual(list(d.items()), [(1, 2)])
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def test_contains(self):
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d = self._empty_mapping()
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self.assertNotIn('a', d)
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self.assertTrue(not ('a' in d))
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self.assertTrue('a' not in d)
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d = self._full_mapping({'a': 1, 'b': 2})
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self.assertIn('a', d)
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self.assertIn('b', d)
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self.assertNotIn('c', d)
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self.assertRaises(TypeError, d.__contains__)
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def test_len(self):
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BasicTestMappingProtocol.test_len(self)
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d = self._full_mapping({'a': 1, 'b': 2})
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self.assertEqual(len(d), 2)
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def test_getitem(self):
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BasicTestMappingProtocol.test_getitem(self)
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d = self._full_mapping({'a': 1, 'b': 2})
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self.assertEqual(d['a'], 1)
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self.assertEqual(d['b'], 2)
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d['c'] = 3
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d['a'] = 4
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self.assertEqual(d['c'], 3)
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self.assertEqual(d['a'], 4)
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del d['b']
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self.assertEqual(d, {'a': 4, 'c': 3})
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self.assertRaises(TypeError, d.__getitem__)
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def test_clear(self):
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d = self._full_mapping({1:1, 2:2, 3:3})
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d.clear()
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self.assertEqual(d, {})
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self.assertRaises(TypeError, d.clear, None)
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def test_update(self):
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BasicTestMappingProtocol.test_update(self)
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# mapping argument
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d = self._empty_mapping()
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d.update({1:100})
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d.update({2:20})
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d.update({1:1, 2:2, 3:3})
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self.assertEqual(d, {1:1, 2:2, 3:3})
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# no argument
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d.update()
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self.assertEqual(d, {1:1, 2:2, 3:3})
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# keyword arguments
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d = self._empty_mapping()
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d.update(x=100)
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d.update(y=20)
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d.update(x=1, y=2, z=3)
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self.assertEqual(d, {"x":1, "y":2, "z":3})
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# item sequence
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d = self._empty_mapping()
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d.update([("x", 100), ("y", 20)])
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self.assertEqual(d, {"x":100, "y":20})
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# Both item sequence and keyword arguments
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d = self._empty_mapping()
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d.update([("x", 100), ("y", 20)], x=1, y=2)
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self.assertEqual(d, {"x":1, "y":2})
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# iterator
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d = self._full_mapping({1:3, 2:4})
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d.update(self._full_mapping({1:2, 3:4, 5:6}).items())
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self.assertEqual(d, {1:2, 2:4, 3:4, 5:6})
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class SimpleUserDict:
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def __init__(self):
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self.d = {1:1, 2:2, 3:3}
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def keys(self):
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return self.d.keys()
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def __getitem__(self, i):
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return self.d[i]
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d.clear()
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d.update(SimpleUserDict())
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self.assertEqual(d, {1:1, 2:2, 3:3})
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def test_fromkeys(self):
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self.assertEqual(self.type2test.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
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d = self._empty_mapping()
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self.assertTrue(not(d.fromkeys('abc') is d))
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self.assertEqual(d.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
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self.assertEqual(d.fromkeys((4,5),0), {4:0, 5:0})
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self.assertEqual(d.fromkeys([]), {})
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def g():
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yield 1
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self.assertEqual(d.fromkeys(g()), {1:None})
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self.assertRaises(TypeError, {}.fromkeys, 3)
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class dictlike(self.type2test): pass
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self.assertEqual(dictlike.fromkeys('a'), {'a':None})
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self.assertEqual(dictlike().fromkeys('a'), {'a':None})
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self.assertTrue(dictlike.fromkeys('a').__class__ is dictlike)
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self.assertTrue(dictlike().fromkeys('a').__class__ is dictlike)
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self.assertTrue(type(dictlike.fromkeys('a')) is dictlike)
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class mydict(self.type2test):
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def __new__(cls):
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return collections.UserDict()
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ud = mydict.fromkeys('ab')
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self.assertEqual(ud, {'a':None, 'b':None})
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self.assertIsInstance(ud, collections.UserDict)
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self.assertRaises(TypeError, dict.fromkeys)
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class Exc(Exception): pass
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class baddict1(self.type2test):
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def __init__(self):
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raise Exc()
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self.assertRaises(Exc, baddict1.fromkeys, [1])
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class BadSeq(object):
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def __iter__(self):
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return self
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def __next__(self):
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raise Exc()
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self.assertRaises(Exc, self.type2test.fromkeys, BadSeq())
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class baddict2(self.type2test):
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def __setitem__(self, key, value):
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raise Exc()
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self.assertRaises(Exc, baddict2.fromkeys, [1])
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def test_copy(self):
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d = self._full_mapping({1:1, 2:2, 3:3})
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self.assertEqual(d.copy(), {1:1, 2:2, 3:3})
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d = self._empty_mapping()
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self.assertEqual(d.copy(), d)
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self.assertIsInstance(d.copy(), d.__class__)
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self.assertRaises(TypeError, d.copy, None)
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def test_get(self):
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BasicTestMappingProtocol.test_get(self)
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d = self._empty_mapping()
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self.assertTrue(d.get('c') is None)
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self.assertEqual(d.get('c', 3), 3)
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d = self._full_mapping({'a' : 1, 'b' : 2})
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self.assertTrue(d.get('c') is None)
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self.assertEqual(d.get('c', 3), 3)
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self.assertEqual(d.get('a'), 1)
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self.assertEqual(d.get('a', 3), 1)
|
|
|
|
def test_setdefault(self):
|
|
BasicTestMappingProtocol.test_setdefault(self)
|
|
d = self._empty_mapping()
|
|
self.assertTrue(d.setdefault('key0') is None)
|
|
d.setdefault('key0', [])
|
|
self.assertTrue(d.setdefault('key0') is None)
|
|
d.setdefault('key', []).append(3)
|
|
self.assertEqual(d['key'][0], 3)
|
|
d.setdefault('key', []).append(4)
|
|
self.assertEqual(len(d['key']), 2)
|
|
|
|
def test_popitem(self):
|
|
BasicTestMappingProtocol.test_popitem(self)
|
|
for copymode in -1, +1:
|
|
# -1: b has same structure as a
|
|
# +1: b is a.copy()
|
|
for log2size in range(12):
|
|
size = 2**log2size
|
|
a = self._empty_mapping()
|
|
b = self._empty_mapping()
|
|
for i in range(size):
|
|
a[repr(i)] = i
|
|
if copymode < 0:
|
|
b[repr(i)] = i
|
|
if copymode > 0:
|
|
b = a.copy()
|
|
for i in range(size):
|
|
ka, va = ta = a.popitem()
|
|
self.assertEqual(va, int(ka))
|
|
kb, vb = tb = b.popitem()
|
|
self.assertEqual(vb, int(kb))
|
|
self.assertTrue(not(copymode < 0 and ta != tb))
|
|
self.assertTrue(not a)
|
|
self.assertTrue(not b)
|
|
|
|
def test_pop(self):
|
|
BasicTestMappingProtocol.test_pop(self)
|
|
|
|
# Tests for pop with specified key
|
|
d = self._empty_mapping()
|
|
k, v = 'abc', 'def'
|
|
|
|
self.assertEqual(d.pop(k, v), v)
|
|
d[k] = v
|
|
self.assertEqual(d.pop(k, 1), v)
|
|
|
|
|
|
class TestHashMappingProtocol(TestMappingProtocol):
|
|
|
|
def test_getitem(self):
|
|
TestMappingProtocol.test_getitem(self)
|
|
class Exc(Exception): pass
|
|
|
|
class BadEq(object):
|
|
def __eq__(self, other):
|
|
raise Exc()
|
|
def __hash__(self):
|
|
return 24
|
|
|
|
d = self._empty_mapping()
|
|
d[BadEq()] = 42
|
|
self.assertRaises(KeyError, d.__getitem__, 23)
|
|
|
|
class BadHash(object):
|
|
fail = False
|
|
def __hash__(self):
|
|
if self.fail:
|
|
raise Exc()
|
|
else:
|
|
return 42
|
|
|
|
d = self._empty_mapping()
|
|
x = BadHash()
|
|
d[x] = 42
|
|
x.fail = True
|
|
self.assertRaises(Exc, d.__getitem__, x)
|
|
|
|
def test_fromkeys(self):
|
|
TestMappingProtocol.test_fromkeys(self)
|
|
class mydict(self.type2test):
|
|
def __new__(cls):
|
|
return collections.UserDict()
|
|
ud = mydict.fromkeys('ab')
|
|
self.assertEqual(ud, {'a':None, 'b':None})
|
|
self.assertIsInstance(ud, collections.UserDict)
|
|
|
|
def test_pop(self):
|
|
TestMappingProtocol.test_pop(self)
|
|
|
|
class Exc(Exception): pass
|
|
|
|
class BadHash(object):
|
|
fail = False
|
|
def __hash__(self):
|
|
if self.fail:
|
|
raise Exc()
|
|
else:
|
|
return 42
|
|
|
|
d = self._empty_mapping()
|
|
x = BadHash()
|
|
d[x] = 42
|
|
x.fail = True
|
|
self.assertRaises(Exc, d.pop, x)
|
|
|
|
def test_mutatingiteration(self):
|
|
d = self._empty_mapping()
|
|
d[1] = 1
|
|
try:
|
|
for i in d:
|
|
d[i+1] = 1
|
|
except RuntimeError:
|
|
pass
|
|
else:
|
|
self.fail("changing dict size during iteration doesn't raise Error")
|
|
|
|
def test_repr(self):
|
|
d = self._empty_mapping()
|
|
self.assertEqual(repr(d), '{}')
|
|
d[1] = 2
|
|
self.assertEqual(repr(d), '{1: 2}')
|
|
d = self._empty_mapping()
|
|
d[1] = d
|
|
self.assertEqual(repr(d), '{1: {...}}')
|
|
|
|
class Exc(Exception): pass
|
|
|
|
class BadRepr(object):
|
|
def __repr__(self):
|
|
raise Exc()
|
|
|
|
d = self._full_mapping({1: BadRepr()})
|
|
self.assertRaises(Exc, repr, d)
|
|
|
|
def test_eq(self):
|
|
self.assertEqual(self._empty_mapping(), self._empty_mapping())
|
|
self.assertEqual(self._full_mapping({1: 2}),
|
|
self._full_mapping({1: 2}))
|
|
|
|
class Exc(Exception): pass
|
|
|
|
class BadCmp(object):
|
|
def __eq__(self, other):
|
|
raise Exc()
|
|
def __hash__(self):
|
|
return 1
|
|
|
|
d1 = self._full_mapping({BadCmp(): 1})
|
|
d2 = self._full_mapping({1: 1})
|
|
self.assertRaises(Exc, lambda: BadCmp()==1)
|
|
self.assertRaises(Exc, lambda: d1==d2)
|
|
|
|
def test_setdefault(self):
|
|
TestMappingProtocol.test_setdefault(self)
|
|
|
|
class Exc(Exception): pass
|
|
|
|
class BadHash(object):
|
|
fail = False
|
|
def __hash__(self):
|
|
if self.fail:
|
|
raise Exc()
|
|
else:
|
|
return 42
|
|
|
|
d = self._empty_mapping()
|
|
x = BadHash()
|
|
d[x] = 42
|
|
x.fail = True
|
|
self.assertRaises(Exc, d.setdefault, x, [])
|