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Issue #26182: Raise DeprecationWarning for improper use of async/await keywords

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This commit is contained in:
Yury Selivanov 2016-09-15 12:50:23 -04:00
parent 6775231597
commit 8987c9d219
6 changed files with 125 additions and 56 deletions
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133
Lib/test/test_coroutines.py
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@ -358,57 +358,110 @@ class AsyncBadSyntaxTest(unittest.TestCase):
with self.subTest(code=code), self.assertRaises(SyntaxError):
compile(code, "<test>", "exec")
def test_badsyntax_2(self):
samples = [
"""def foo():
await = 1
""",
"""class Bar:
def async(): pass
""",
"""class Bar:
async = 1
""",
"""class async:
pass
""",
"""class await:
pass
""",
"""import math as await""",
"""def async():
pass""",
"""def foo(*, await=1):
pass"""
"""async = 1""",
"""print(await=1)"""
]
for code in samples:
with self.subTest(code=code), self.assertWarnsRegex(
DeprecationWarning,
"'await' will become reserved keywords"):
compile(code, "<test>", "exec")
def test_badsyntax_3(self):
with self.assertRaises(DeprecationWarning):
with warnings.catch_warnings():
warnings.simplefilter("error")
compile("async = 1", "<test>", "exec")
def test_goodsyntax_1(self):
# Tests for issue 24619
def foo(await):
async def foo(): pass
async def foo():
pass
return await + 1
self.assertEqual(foo(10), 11)
samples = [
'''def foo(await):
async def foo(): pass
async def foo():
pass
return await + 1
''',
def foo(await):
async def foo(): pass
async def foo(): pass
return await + 2
self.assertEqual(foo(20), 22)
'''def foo(await):
async def foo(): pass
async def foo(): pass
return await + 1
''',
def foo(await):
'''def foo(await):
async def foo(): pass
async def foo(): pass
async def foo(): pass
async def foo(): pass
return await + 2
self.assertEqual(foo(20), 22)
return await + 1
''',
def foo(await):
"""spam"""
async def foo(): \
pass
# 123
async def foo(): pass
# 456
return await + 2
self.assertEqual(foo(20), 22)
'''def foo(await):
"""spam"""
async def foo(): \
pass
# 123
async def foo(): pass
# 456
return await + 1
''',
def foo(await):
def foo(): pass
def foo(): pass
async def bar(): return await_
await_ = await
try:
bar().send(None)
except StopIteration as ex:
return ex.args[0]
self.assertEqual(foo(42), 42)
'''def foo(await):
def foo(): pass
def foo(): pass
async def bar(): return await_
await_ = await
try:
bar().send(None)
except StopIteration as ex:
return ex.args[0] + 1
'''
]
async def f():
async def g(): pass
await z
await = 1
self.assertTrue(inspect.iscoroutinefunction(f))
for code in samples:
with self.subTest(code=code):
loc = {}
with warnings.catch_warnings():
warnings.simplefilter("ignore")
exec(code, loc, loc)
self.assertEqual(loc['foo'](10), 11)
class TokenizerRegrTest(unittest.TestCase):