mirror of
https://github.com/python/cpython.git
synced 2024-11-24 18:34:43 +08:00
9a4135e939
If a "=" is specified a the end of an f-string expression, the f-string will evaluate to the text of the expression, followed by '=', followed by the repr of the value of the expression.
282 lines
9.9 KiB
Python
282 lines
9.9 KiB
Python
# Test various flavors of legal and illegal future statements
|
|
|
|
import unittest
|
|
from test import support
|
|
from textwrap import dedent
|
|
import os
|
|
import re
|
|
|
|
rx = re.compile(r'\((\S+).py, line (\d+)')
|
|
|
|
def get_error_location(msg):
|
|
mo = rx.search(str(msg))
|
|
return mo.group(1, 2)
|
|
|
|
class FutureTest(unittest.TestCase):
|
|
|
|
def check_syntax_error(self, err, basename, lineno, offset=1):
|
|
self.assertIn('%s.py, line %d' % (basename, lineno), str(err))
|
|
self.assertEqual(os.path.basename(err.filename), basename + '.py')
|
|
self.assertEqual(err.lineno, lineno)
|
|
self.assertEqual(err.offset, offset)
|
|
|
|
def test_future1(self):
|
|
with support.CleanImport('future_test1'):
|
|
from test import future_test1
|
|
self.assertEqual(future_test1.result, 6)
|
|
|
|
def test_future2(self):
|
|
with support.CleanImport('future_test2'):
|
|
from test import future_test2
|
|
self.assertEqual(future_test2.result, 6)
|
|
|
|
def test_future3(self):
|
|
with support.CleanImport('test_future3'):
|
|
from test import test_future3
|
|
|
|
def test_badfuture3(self):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
from test import badsyntax_future3
|
|
self.check_syntax_error(cm.exception, "badsyntax_future3", 3)
|
|
|
|
def test_badfuture4(self):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
from test import badsyntax_future4
|
|
self.check_syntax_error(cm.exception, "badsyntax_future4", 3)
|
|
|
|
def test_badfuture5(self):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
from test import badsyntax_future5
|
|
self.check_syntax_error(cm.exception, "badsyntax_future5", 4)
|
|
|
|
def test_badfuture6(self):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
from test import badsyntax_future6
|
|
self.check_syntax_error(cm.exception, "badsyntax_future6", 3)
|
|
|
|
def test_badfuture7(self):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
from test import badsyntax_future7
|
|
self.check_syntax_error(cm.exception, "badsyntax_future7", 3, 53)
|
|
|
|
def test_badfuture8(self):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
from test import badsyntax_future8
|
|
self.check_syntax_error(cm.exception, "badsyntax_future8", 3)
|
|
|
|
def test_badfuture9(self):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
from test import badsyntax_future9
|
|
self.check_syntax_error(cm.exception, "badsyntax_future9", 3)
|
|
|
|
def test_badfuture10(self):
|
|
with self.assertRaises(SyntaxError) as cm:
|
|
from test import badsyntax_future10
|
|
self.check_syntax_error(cm.exception, "badsyntax_future10", 3)
|
|
|
|
def test_parserhack(self):
|
|
# test that the parser.c::future_hack function works as expected
|
|
# Note: although this test must pass, it's not testing the original
|
|
# bug as of 2.6 since the with statement is not optional and
|
|
# the parser hack disabled. If a new keyword is introduced in
|
|
# 2.6, change this to refer to the new future import.
|
|
try:
|
|
exec("from __future__ import print_function; print 0")
|
|
except SyntaxError:
|
|
pass
|
|
else:
|
|
self.fail("syntax error didn't occur")
|
|
|
|
try:
|
|
exec("from __future__ import (print_function); print 0")
|
|
except SyntaxError:
|
|
pass
|
|
else:
|
|
self.fail("syntax error didn't occur")
|
|
|
|
def test_multiple_features(self):
|
|
with support.CleanImport("test.test_future5"):
|
|
from test import test_future5
|
|
|
|
def test_unicode_literals_exec(self):
|
|
scope = {}
|
|
exec("from __future__ import unicode_literals; x = ''", {}, scope)
|
|
self.assertIsInstance(scope["x"], str)
|
|
|
|
class AnnotationsFutureTestCase(unittest.TestCase):
|
|
template = dedent(
|
|
"""
|
|
from __future__ import annotations
|
|
def f() -> {ann}:
|
|
...
|
|
def g(arg: {ann}) -> None:
|
|
...
|
|
var: {ann}
|
|
var2: {ann} = None
|
|
"""
|
|
)
|
|
|
|
def getActual(self, annotation):
|
|
scope = {}
|
|
exec(self.template.format(ann=annotation), {}, scope)
|
|
func_ret_ann = scope['f'].__annotations__['return']
|
|
func_arg_ann = scope['g'].__annotations__['arg']
|
|
var_ann1 = scope['__annotations__']['var']
|
|
var_ann2 = scope['__annotations__']['var2']
|
|
self.assertEqual(func_ret_ann, func_arg_ann)
|
|
self.assertEqual(func_ret_ann, var_ann1)
|
|
self.assertEqual(func_ret_ann, var_ann2)
|
|
return func_ret_ann
|
|
|
|
def assertAnnotationEqual(
|
|
self, annotation, expected=None, drop_parens=False, is_tuple=False,
|
|
):
|
|
actual = self.getActual(annotation)
|
|
if expected is None:
|
|
expected = annotation if not is_tuple else annotation[1:-1]
|
|
if drop_parens:
|
|
self.assertNotEqual(actual, expected)
|
|
actual = actual.replace("(", "").replace(")", "")
|
|
|
|
self.assertEqual(actual, expected)
|
|
|
|
def test_annotations(self):
|
|
eq = self.assertAnnotationEqual
|
|
eq('...')
|
|
eq("'some_string'")
|
|
eq("b'\\xa3'")
|
|
eq('Name')
|
|
eq('None')
|
|
eq('True')
|
|
eq('False')
|
|
eq('1')
|
|
eq('1.0')
|
|
eq('1j')
|
|
eq('True or False')
|
|
eq('True or False or None')
|
|
eq('True and False')
|
|
eq('True and False and None')
|
|
eq('Name1 and Name2 or Name3')
|
|
eq('Name1 and (Name2 or Name3)')
|
|
eq('Name1 or Name2 and Name3')
|
|
eq('(Name1 or Name2) and Name3')
|
|
eq('Name1 and Name2 or Name3 and Name4')
|
|
eq('Name1 or Name2 and Name3 or Name4')
|
|
eq('a + b + (c + d)')
|
|
eq('a * b * (c * d)')
|
|
eq('(a ** b) ** c ** d')
|
|
eq('v1 << 2')
|
|
eq('1 >> v2')
|
|
eq('1 % finished')
|
|
eq('1 + v2 - v3 * 4 ^ 5 ** v6 / 7 // 8')
|
|
eq('not great')
|
|
eq('not not great')
|
|
eq('~great')
|
|
eq('+value')
|
|
eq('++value')
|
|
eq('-1')
|
|
eq('~int and not v1 ^ 123 + v2 | True')
|
|
eq('a + (not b)')
|
|
eq('lambda: None')
|
|
eq('lambda arg: None')
|
|
eq('lambda a=True: a')
|
|
eq('lambda a, b, c=True: a')
|
|
eq("lambda a, b, c=True, *, d=1 << v2, e='str': a")
|
|
eq("lambda a, b, c=True, *vararg, d, e='str', **kwargs: a + b")
|
|
eq('lambda x: lambda y: x + y')
|
|
eq('1 if True else 2')
|
|
eq('str or None if int or True else str or bytes or None')
|
|
eq('str or None if (1 if True else 2) else str or bytes or None')
|
|
eq("0 if not x else 1 if x > 0 else -1")
|
|
eq("(1 if x > 0 else -1) if x else 0")
|
|
eq("{'2.7': dead, '3.7': long_live or die_hard}")
|
|
eq("{'2.7': dead, '3.7': long_live or die_hard, **{'3.6': verygood}}")
|
|
eq("{**a, **b, **c}")
|
|
eq("{'2.7', '3.6', '3.7', '3.8', '3.9', '4.0' if gilectomy else '3.10'}")
|
|
eq("{*a, *b, *c}")
|
|
eq("({'a': 'b'}, True or False, +value, 'string', b'bytes') or None")
|
|
eq("()")
|
|
eq("(a,)")
|
|
eq("(a, b)")
|
|
eq("(a, b, c)")
|
|
eq("(*a, *b, *c)")
|
|
eq("[]")
|
|
eq("[1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or A, 11 or B, 12 or C]")
|
|
eq("[*a, *b, *c]")
|
|
eq("{i for i in (1, 2, 3)}")
|
|
eq("{i ** 2 for i in (1, 2, 3)}")
|
|
eq("{i ** 2 for i, _ in ((1, 'a'), (2, 'b'), (3, 'c'))}")
|
|
eq("{i ** 2 + j for i in (1, 2, 3) for j in (1, 2, 3)}")
|
|
eq("[i for i in (1, 2, 3)]")
|
|
eq("[i ** 2 for i in (1, 2, 3)]")
|
|
eq("[i ** 2 for i, _ in ((1, 'a'), (2, 'b'), (3, 'c'))]")
|
|
eq("[i ** 2 + j for i in (1, 2, 3) for j in (1, 2, 3)]")
|
|
eq("(i for i in (1, 2, 3))")
|
|
eq("(i ** 2 for i in (1, 2, 3))")
|
|
eq("(i ** 2 for i, _ in ((1, 'a'), (2, 'b'), (3, 'c')))")
|
|
eq("(i ** 2 + j for i in (1, 2, 3) for j in (1, 2, 3))")
|
|
eq("{i: 0 for i in (1, 2, 3)}")
|
|
eq("{i: j for i, j in ((1, 'a'), (2, 'b'), (3, 'c'))}")
|
|
eq("[(x, y) for x, y in (a, b)]")
|
|
eq("[(x,) for x, in (a,)]")
|
|
eq("Python3 > Python2 > COBOL")
|
|
eq("Life is Life")
|
|
eq("call()")
|
|
eq("call(arg)")
|
|
eq("call(kwarg='hey')")
|
|
eq("call(arg, kwarg='hey')")
|
|
eq("call(arg, *args, another, kwarg='hey')")
|
|
eq("call(arg, another, kwarg='hey', **kwargs, kwarg2='ho')")
|
|
eq("lukasz.langa.pl")
|
|
eq("call.me(maybe)")
|
|
eq("1 .real")
|
|
eq("1.0.real")
|
|
eq("....__class__")
|
|
eq("list[str]")
|
|
eq("dict[str, int]")
|
|
eq("set[str,]")
|
|
eq("tuple[str, ...]")
|
|
eq("tuple[str, int, float, dict[str, int]]")
|
|
eq("slice[0]")
|
|
eq("slice[0:1]")
|
|
eq("slice[0:1:2]")
|
|
eq("slice[:]")
|
|
eq("slice[:-1]")
|
|
eq("slice[1:]")
|
|
eq("slice[::-1]")
|
|
eq("slice[()]")
|
|
eq("slice[a, b:c, d:e:f]")
|
|
eq("slice[(x for x in a)]")
|
|
eq('str or None if sys.version_info[0] > (3,) else str or bytes or None')
|
|
eq("f'f-string without formatted values is just a string'")
|
|
eq("f'{{NOT a formatted value}}'")
|
|
eq("f'some f-string with {a} {few():.2f} {formatted.values!r}'")
|
|
eq('''f"{f'{nested} inner'} outer"''')
|
|
eq("f'space between opening braces: { {a for a in (1, 2, 3)}}'")
|
|
eq("f'{(lambda x: x)}'")
|
|
eq("f'{(None if a else lambda x: x)}'")
|
|
eq("f'{x}'")
|
|
eq("f'{x!r}'")
|
|
eq("f'{x!a}'")
|
|
eq("f'{x=!r}'")
|
|
eq("f'{x=:}'")
|
|
eq("f'{x=:.2f}'")
|
|
eq("f'{x=!r}'")
|
|
eq("f'{x=!a}'")
|
|
eq("f'{x=!s:*^20}'")
|
|
eq('(yield from outside_of_generator)')
|
|
eq('(yield)')
|
|
eq('(yield a + b)')
|
|
eq('await some.complicated[0].call(with_args=True or 1 is not 1)')
|
|
eq('[x for x in (a if b else c)]')
|
|
eq('[x for x in a if (b if c else d)]')
|
|
eq('f(x for x in a)')
|
|
eq('f(1, (x for x in a))')
|
|
eq('f((x for x in a), 2)')
|
|
eq('(((a)))', 'a')
|
|
eq('(((a, b)))', '(a, b)')
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|