1043 lines
27 KiB
Python
1043 lines
27 KiB
Python
"""
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Tests for various Pyflakes behavior.
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"""
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from sys import version_info
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from pyflakes import messages as m
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from pyflakes.test.harness import TestCase, skip, skipIf
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class Test(TestCase):
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def test_duplicateArgs(self):
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self.flakes('def fu(bar, bar): pass', m.DuplicateArgument)
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def test_localReferencedBeforeAssignment(self):
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self.flakes('''
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a = 1
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def f():
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a; a=1
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f()
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''', m.UndefinedLocal, m.UnusedVariable)
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@skipIf(version_info >= (3,),
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'in Python 3 list comprehensions execute in a separate scope')
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def test_redefinedInListComp(self):
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"""
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Test that shadowing a variable in a list comprehension raises
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a warning.
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"""
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self.flakes('''
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a = 1
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[1 for a, b in [(1, 2)]]
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''', m.RedefinedInListComp)
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self.flakes('''
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class A:
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a = 1
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[1 for a, b in [(1, 2)]]
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''', m.RedefinedInListComp)
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self.flakes('''
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def f():
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a = 1
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[1 for a, b in [(1, 2)]]
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''', m.RedefinedInListComp)
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self.flakes('''
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[1 for a, b in [(1, 2)]]
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[1 for a, b in [(1, 2)]]
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''')
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self.flakes('''
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for a, b in [(1, 2)]:
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pass
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[1 for a, b in [(1, 2)]]
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''')
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def test_redefinedInGenerator(self):
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"""
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Test that reusing a variable in a generator does not raise
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a warning.
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"""
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self.flakes('''
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a = 1
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(1 for a, b in [(1, 2)])
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''')
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self.flakes('''
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class A:
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a = 1
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list(1 for a, b in [(1, 2)])
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''')
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self.flakes('''
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def f():
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a = 1
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(1 for a, b in [(1, 2)])
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''', m.UnusedVariable)
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self.flakes('''
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(1 for a, b in [(1, 2)])
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(1 for a, b in [(1, 2)])
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''')
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self.flakes('''
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for a, b in [(1, 2)]:
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pass
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(1 for a, b in [(1, 2)])
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''')
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@skipIf(version_info < (2, 7), "Python >= 2.7 only")
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def test_redefinedInSetComprehension(self):
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"""
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Test that reusing a variable in a set comprehension does not raise
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a warning.
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"""
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self.flakes('''
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a = 1
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{1 for a, b in [(1, 2)]}
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''')
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self.flakes('''
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class A:
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a = 1
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{1 for a, b in [(1, 2)]}
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''')
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self.flakes('''
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def f():
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a = 1
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{1 for a, b in [(1, 2)]}
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''', m.UnusedVariable)
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self.flakes('''
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{1 for a, b in [(1, 2)]}
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{1 for a, b in [(1, 2)]}
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''')
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self.flakes('''
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for a, b in [(1, 2)]:
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pass
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{1 for a, b in [(1, 2)]}
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''')
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@skipIf(version_info < (2, 7), "Python >= 2.7 only")
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def test_redefinedInDictComprehension(self):
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"""
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Test that reusing a variable in a dict comprehension does not raise
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a warning.
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"""
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self.flakes('''
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a = 1
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{1: 42 for a, b in [(1, 2)]}
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''')
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self.flakes('''
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class A:
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a = 1
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{1: 42 for a, b in [(1, 2)]}
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''')
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self.flakes('''
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def f():
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a = 1
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{1: 42 for a, b in [(1, 2)]}
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''', m.UnusedVariable)
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self.flakes('''
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{1: 42 for a, b in [(1, 2)]}
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{1: 42 for a, b in [(1, 2)]}
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''')
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self.flakes('''
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for a, b in [(1, 2)]:
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pass
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{1: 42 for a, b in [(1, 2)]}
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''')
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def test_redefinedFunction(self):
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"""
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Test that shadowing a function definition with another one raises a
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warning.
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"""
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self.flakes('''
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def a(): pass
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def a(): pass
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''', m.RedefinedWhileUnused)
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def test_redefinedClassFunction(self):
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"""
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Test that shadowing a function definition in a class suite with another
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one raises a warning.
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"""
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self.flakes('''
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class A:
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def a(): pass
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def a(): pass
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''', m.RedefinedWhileUnused)
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def test_redefinedIfElseFunction(self):
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"""
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Test that shadowing a function definition twice in an if
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and else block does not raise a warning.
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"""
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self.flakes('''
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if True:
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def a(): pass
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else:
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def a(): pass
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''')
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def test_redefinedIfFunction(self):
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"""
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Test that shadowing a function definition within an if block
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raises a warning.
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"""
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self.flakes('''
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if True:
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def a(): pass
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def a(): pass
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''', m.RedefinedWhileUnused)
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def test_redefinedTryExceptFunction(self):
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"""
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Test that shadowing a function definition twice in try
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and except block does not raise a warning.
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"""
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self.flakes('''
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try:
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def a(): pass
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except:
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def a(): pass
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''')
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def test_redefinedTryFunction(self):
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"""
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Test that shadowing a function definition within a try block
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raises a warning.
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"""
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self.flakes('''
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try:
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def a(): pass
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def a(): pass
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except:
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pass
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''', m.RedefinedWhileUnused)
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def test_redefinedIfElseInListComp(self):
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"""
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Test that shadowing a variable in a list comprehension in
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an if and else block does not raise a warning.
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"""
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self.flakes('''
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if False:
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a = 1
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else:
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[a for a in '12']
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''')
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@skipIf(version_info >= (3,),
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'in Python 3 list comprehensions execute in a separate scope')
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def test_redefinedElseInListComp(self):
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"""
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Test that shadowing a variable in a list comprehension in
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an else (or if) block raises a warning.
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"""
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self.flakes('''
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if False:
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pass
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else:
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a = 1
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[a for a in '12']
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''', m.RedefinedInListComp)
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def test_functionDecorator(self):
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"""
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Test that shadowing a function definition with a decorated version of
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that function does not raise a warning.
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"""
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self.flakes('''
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from somewhere import somedecorator
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def a(): pass
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a = somedecorator(a)
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''')
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def test_classFunctionDecorator(self):
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"""
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Test that shadowing a function definition in a class suite with a
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decorated version of that function does not raise a warning.
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"""
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self.flakes('''
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class A:
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def a(): pass
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a = classmethod(a)
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''')
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@skipIf(version_info < (2, 6), "Python >= 2.6 only")
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def test_modernProperty(self):
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self.flakes("""
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class A:
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@property
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def t(self):
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pass
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@t.setter
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def t(self, value):
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pass
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@t.deleter
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def t(self):
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pass
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""")
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def test_unaryPlus(self):
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"""Don't die on unary +."""
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self.flakes('+1')
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def test_undefinedBaseClass(self):
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"""
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If a name in the base list of a class definition is undefined, a
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warning is emitted.
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"""
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self.flakes('''
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class foo(foo):
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pass
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''', m.UndefinedName)
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def test_classNameUndefinedInClassBody(self):
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"""
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If a class name is used in the body of that class's definition and
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the name is not already defined, a warning is emitted.
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"""
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self.flakes('''
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class foo:
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foo
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''', m.UndefinedName)
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def test_classNameDefinedPreviously(self):
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"""
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If a class name is used in the body of that class's definition and
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the name was previously defined in some other way, no warning is
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emitted.
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"""
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self.flakes('''
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foo = None
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class foo:
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foo
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''')
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def test_classRedefinition(self):
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"""
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If a class is defined twice in the same module, a warning is emitted.
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"""
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self.flakes('''
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class Foo:
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pass
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class Foo:
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pass
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''', m.RedefinedWhileUnused)
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def test_functionRedefinedAsClass(self):
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"""
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If a function is redefined as a class, a warning is emitted.
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"""
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self.flakes('''
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def Foo():
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pass
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class Foo:
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pass
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''', m.RedefinedWhileUnused)
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def test_classRedefinedAsFunction(self):
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"""
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If a class is redefined as a function, a warning is emitted.
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"""
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self.flakes('''
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class Foo:
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pass
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def Foo():
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pass
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''', m.RedefinedWhileUnused)
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def test_classWithReturn(self):
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"""
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If a return is used inside a class, a warning is emitted.
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"""
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self.flakes('''
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class Foo(object):
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return
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''', m.ReturnOutsideFunction)
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@skip("todo: Too hard to make this warn but other cases stay silent")
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def test_doubleAssignment(self):
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"""
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If a variable is re-assigned to without being used, no warning is
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emitted.
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"""
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self.flakes('''
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x = 10
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x = 20
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''', m.RedefinedWhileUnused)
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def test_doubleAssignmentConditionally(self):
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"""
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If a variable is re-assigned within a conditional, no warning is
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emitted.
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"""
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self.flakes('''
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x = 10
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if True:
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x = 20
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''')
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def test_doubleAssignmentWithUse(self):
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"""
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If a variable is re-assigned to after being used, no warning is
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emitted.
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"""
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self.flakes('''
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x = 10
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y = x * 2
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x = 20
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''')
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def test_comparison(self):
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"""
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If a defined name is used on either side of any of the six comparison
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operators, no warning is emitted.
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"""
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self.flakes('''
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x = 10
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y = 20
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x < y
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x <= y
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x == y
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x != y
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x >= y
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x > y
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''')
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def test_identity(self):
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"""
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If a defined name is used on either side of an identity test, no
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warning is emitted.
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"""
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self.flakes('''
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x = 10
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y = 20
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x is y
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x is not y
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''')
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def test_containment(self):
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"""
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If a defined name is used on either side of a containment test, no
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warning is emitted.
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"""
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self.flakes('''
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x = 10
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y = 20
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x in y
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x not in y
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''')
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def test_loopControl(self):
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"""
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break and continue statements are supported.
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"""
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self.flakes('''
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for x in [1, 2]:
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break
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''')
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self.flakes('''
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for x in [1, 2]:
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continue
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''')
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def test_ellipsis(self):
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"""
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Ellipsis in a slice is supported.
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"""
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self.flakes('''
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[1, 2][...]
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''')
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def test_extendedSlice(self):
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"""
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Extended slices are supported.
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"""
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self.flakes('''
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x = 3
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[1, 2][x,:]
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''')
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def test_varAugmentedAssignment(self):
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"""
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Augmented assignment of a variable is supported.
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We don't care about var refs.
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"""
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self.flakes('''
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foo = 0
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foo += 1
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''')
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def test_attrAugmentedAssignment(self):
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"""
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Augmented assignment of attributes is supported.
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We don't care about attr refs.
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"""
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self.flakes('''
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foo = None
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foo.bar += foo.baz
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''')
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def test_globalDeclaredInDifferentScope(self):
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"""
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A 'global' can be declared in one scope and reused in another.
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"""
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self.flakes('''
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def f(): global foo
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def g(): foo = 'anything'; foo.is_used()
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''')
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class TestUnusedAssignment(TestCase):
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"""
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Tests for warning about unused assignments.
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"""
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def test_unusedVariable(self):
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"""
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Warn when a variable in a function is assigned a value that's never
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used.
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"""
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self.flakes('''
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def a():
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b = 1
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''', m.UnusedVariable)
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def test_unusedVariableAsLocals(self):
|
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"""
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Using locals() it is perfectly valid to have unused variables
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"""
|
|
self.flakes('''
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def a():
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b = 1
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return locals()
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''')
|
|
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def test_unusedVariableNoLocals(self):
|
|
"""
|
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Using locals() in wrong scope should not matter
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|
"""
|
|
self.flakes('''
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def a():
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locals()
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def a():
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b = 1
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return
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''', m.UnusedVariable)
|
|
|
|
@skip("todo: Difficult because it does't apply in the context of a loop")
|
|
def test_unusedReassignedVariable(self):
|
|
"""
|
|
Shadowing a used variable can still raise an UnusedVariable warning.
|
|
"""
|
|
self.flakes('''
|
|
def a():
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b = 1
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|
b.foo()
|
|
b = 2
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|
''', m.UnusedVariable)
|
|
|
|
def test_variableUsedInLoop(self):
|
|
"""
|
|
Shadowing a used variable cannot raise an UnusedVariable warning in the
|
|
context of a loop.
|
|
"""
|
|
self.flakes('''
|
|
def a():
|
|
b = True
|
|
while b:
|
|
b = False
|
|
''')
|
|
|
|
def test_assignToGlobal(self):
|
|
"""
|
|
Assigning to a global and then not using that global is perfectly
|
|
acceptable. Do not mistake it for an unused local variable.
|
|
"""
|
|
self.flakes('''
|
|
b = 0
|
|
def a():
|
|
global b
|
|
b = 1
|
|
''')
|
|
|
|
@skipIf(version_info < (3,), 'new in Python 3')
|
|
def test_assignToNonlocal(self):
|
|
"""
|
|
Assigning to a nonlocal and then not using that binding is perfectly
|
|
acceptable. Do not mistake it for an unused local variable.
|
|
"""
|
|
self.flakes('''
|
|
b = b'0'
|
|
def a():
|
|
nonlocal b
|
|
b = b'1'
|
|
''')
|
|
|
|
def test_assignToMember(self):
|
|
"""
|
|
Assigning to a member of another object and then not using that member
|
|
variable is perfectly acceptable. Do not mistake it for an unused
|
|
local variable.
|
|
"""
|
|
# XXX: Adding this test didn't generate a failure. Maybe not
|
|
# necessary?
|
|
self.flakes('''
|
|
class b:
|
|
pass
|
|
def a():
|
|
b.foo = 1
|
|
''')
|
|
|
|
def test_assignInForLoop(self):
|
|
"""
|
|
Don't warn when a variable in a for loop is assigned to but not used.
|
|
"""
|
|
self.flakes('''
|
|
def f():
|
|
for i in range(10):
|
|
pass
|
|
''')
|
|
|
|
def test_assignInListComprehension(self):
|
|
"""
|
|
Don't warn when a variable in a list comprehension is
|
|
assigned to but not used.
|
|
"""
|
|
self.flakes('''
|
|
def f():
|
|
[None for i in range(10)]
|
|
''')
|
|
|
|
def test_generatorExpression(self):
|
|
"""
|
|
Don't warn when a variable in a generator expression is
|
|
assigned to but not used.
|
|
"""
|
|
self.flakes('''
|
|
def f():
|
|
(None for i in range(10))
|
|
''')
|
|
|
|
def test_assignmentInsideLoop(self):
|
|
"""
|
|
Don't warn when a variable assignment occurs lexically after its use.
|
|
"""
|
|
self.flakes('''
|
|
def f():
|
|
x = None
|
|
for i in range(10):
|
|
if i > 2:
|
|
return x
|
|
x = i * 2
|
|
''')
|
|
|
|
def test_tupleUnpacking(self):
|
|
"""
|
|
Don't warn when a variable included in tuple unpacking is unused. It's
|
|
very common for variables in a tuple unpacking assignment to be unused
|
|
in good Python code, so warning will only create false positives.
|
|
"""
|
|
self.flakes('''
|
|
def f(tup):
|
|
(x, y) = tup
|
|
''')
|
|
self.flakes('''
|
|
def f():
|
|
(x, y) = 1, 2
|
|
''', m.UnusedVariable, m.UnusedVariable)
|
|
self.flakes('''
|
|
def f():
|
|
(x, y) = coords = 1, 2
|
|
if x > 1:
|
|
print(coords)
|
|
''')
|
|
self.flakes('''
|
|
def f():
|
|
(x, y) = coords = 1, 2
|
|
''', m.UnusedVariable)
|
|
self.flakes('''
|
|
def f():
|
|
coords = (x, y) = 1, 2
|
|
''', m.UnusedVariable)
|
|
|
|
def test_listUnpacking(self):
|
|
"""
|
|
Don't warn when a variable included in list unpacking is unused.
|
|
"""
|
|
self.flakes('''
|
|
def f(tup):
|
|
[x, y] = tup
|
|
''')
|
|
self.flakes('''
|
|
def f():
|
|
[x, y] = [1, 2]
|
|
''', m.UnusedVariable, m.UnusedVariable)
|
|
|
|
def test_closedOver(self):
|
|
"""
|
|
Don't warn when the assignment is used in an inner function.
|
|
"""
|
|
self.flakes('''
|
|
def barMaker():
|
|
foo = 5
|
|
def bar():
|
|
return foo
|
|
return bar
|
|
''')
|
|
|
|
def test_doubleClosedOver(self):
|
|
"""
|
|
Don't warn when the assignment is used in an inner function, even if
|
|
that inner function itself is in an inner function.
|
|
"""
|
|
self.flakes('''
|
|
def barMaker():
|
|
foo = 5
|
|
def bar():
|
|
def baz():
|
|
return foo
|
|
return bar
|
|
''')
|
|
|
|
def test_tracebackhideSpecialVariable(self):
|
|
"""
|
|
Do not warn about unused local variable __tracebackhide__, which is
|
|
a special variable for py.test.
|
|
"""
|
|
self.flakes("""
|
|
def helper():
|
|
__tracebackhide__ = True
|
|
""")
|
|
|
|
def test_ifexp(self):
|
|
"""
|
|
Test C{foo if bar else baz} statements.
|
|
"""
|
|
self.flakes("a = 'moo' if True else 'oink'")
|
|
self.flakes("a = foo if True else 'oink'", m.UndefinedName)
|
|
self.flakes("a = 'moo' if True else bar", m.UndefinedName)
|
|
|
|
def test_withStatementNoNames(self):
|
|
"""
|
|
No warnings are emitted for using inside or after a nameless C{with}
|
|
statement a name defined beforehand.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
bar = None
|
|
with open("foo"):
|
|
bar
|
|
bar
|
|
''')
|
|
|
|
def test_withStatementSingleName(self):
|
|
"""
|
|
No warnings are emitted for using a name defined by a C{with} statement
|
|
within the suite or afterwards.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
with open('foo') as bar:
|
|
bar
|
|
bar
|
|
''')
|
|
|
|
def test_withStatementAttributeName(self):
|
|
"""
|
|
No warnings are emitted for using an attribute as the target of a
|
|
C{with} statement.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
import foo
|
|
with open('foo') as foo.bar:
|
|
pass
|
|
''')
|
|
|
|
def test_withStatementSubscript(self):
|
|
"""
|
|
No warnings are emitted for using a subscript as the target of a
|
|
C{with} statement.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
import foo
|
|
with open('foo') as foo[0]:
|
|
pass
|
|
''')
|
|
|
|
def test_withStatementSubscriptUndefined(self):
|
|
"""
|
|
An undefined name warning is emitted if the subscript used as the
|
|
target of a C{with} statement is not defined.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
import foo
|
|
with open('foo') as foo[bar]:
|
|
pass
|
|
''', m.UndefinedName)
|
|
|
|
def test_withStatementTupleNames(self):
|
|
"""
|
|
No warnings are emitted for using any of the tuple of names defined by
|
|
a C{with} statement within the suite or afterwards.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
with open('foo') as (bar, baz):
|
|
bar, baz
|
|
bar, baz
|
|
''')
|
|
|
|
def test_withStatementListNames(self):
|
|
"""
|
|
No warnings are emitted for using any of the list of names defined by a
|
|
C{with} statement within the suite or afterwards.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
with open('foo') as [bar, baz]:
|
|
bar, baz
|
|
bar, baz
|
|
''')
|
|
|
|
def test_withStatementComplicatedTarget(self):
|
|
"""
|
|
If the target of a C{with} statement uses any or all of the valid forms
|
|
for that part of the grammar (See
|
|
U{http://docs.python.org/reference/compound_stmts.html#the-with-statement}),
|
|
the names involved are checked both for definedness and any bindings
|
|
created are respected in the suite of the statement and afterwards.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
c = d = e = g = h = i = None
|
|
with open('foo') as [(a, b), c[d], e.f, g[h:i]]:
|
|
a, b, c, d, e, g, h, i
|
|
a, b, c, d, e, g, h, i
|
|
''')
|
|
|
|
def test_withStatementSingleNameUndefined(self):
|
|
"""
|
|
An undefined name warning is emitted if the name first defined by a
|
|
C{with} statement is used before the C{with} statement.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
bar
|
|
with open('foo') as bar:
|
|
pass
|
|
''', m.UndefinedName)
|
|
|
|
def test_withStatementTupleNamesUndefined(self):
|
|
"""
|
|
An undefined name warning is emitted if a name first defined by a the
|
|
tuple-unpacking form of the C{with} statement is used before the
|
|
C{with} statement.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
baz
|
|
with open('foo') as (bar, baz):
|
|
pass
|
|
''', m.UndefinedName)
|
|
|
|
def test_withStatementSingleNameRedefined(self):
|
|
"""
|
|
A redefined name warning is emitted if a name bound by an import is
|
|
rebound by the name defined by a C{with} statement.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
import bar
|
|
with open('foo') as bar:
|
|
pass
|
|
''', m.RedefinedWhileUnused)
|
|
|
|
def test_withStatementTupleNamesRedefined(self):
|
|
"""
|
|
A redefined name warning is emitted if a name bound by an import is
|
|
rebound by one of the names defined by the tuple-unpacking form of a
|
|
C{with} statement.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
import bar
|
|
with open('foo') as (bar, baz):
|
|
pass
|
|
''', m.RedefinedWhileUnused)
|
|
|
|
def test_withStatementUndefinedInside(self):
|
|
"""
|
|
An undefined name warning is emitted if a name is used inside the
|
|
body of a C{with} statement without first being bound.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
with open('foo') as bar:
|
|
baz
|
|
''', m.UndefinedName)
|
|
|
|
def test_withStatementNameDefinedInBody(self):
|
|
"""
|
|
A name defined in the body of a C{with} statement can be used after
|
|
the body ends without warning.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
with open('foo') as bar:
|
|
baz = 10
|
|
baz
|
|
''')
|
|
|
|
def test_withStatementUndefinedInExpression(self):
|
|
"""
|
|
An undefined name warning is emitted if a name in the I{test}
|
|
expression of a C{with} statement is undefined.
|
|
"""
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
with bar as baz:
|
|
pass
|
|
''', m.UndefinedName)
|
|
|
|
self.flakes('''
|
|
from __future__ import with_statement
|
|
with bar as bar:
|
|
pass
|
|
''', m.UndefinedName)
|
|
|
|
@skipIf(version_info < (2, 7), "Python >= 2.7 only")
|
|
def test_dictComprehension(self):
|
|
"""
|
|
Dict comprehensions are properly handled.
|
|
"""
|
|
self.flakes('''
|
|
a = {1: x for x in range(10)}
|
|
''')
|
|
|
|
@skipIf(version_info < (2, 7), "Python >= 2.7 only")
|
|
def test_setComprehensionAndLiteral(self):
|
|
"""
|
|
Set comprehensions are properly handled.
|
|
"""
|
|
self.flakes('''
|
|
a = {1, 2, 3}
|
|
b = {x for x in range(10)}
|
|
''')
|
|
|
|
def test_exceptionUsedInExcept(self):
|
|
as_exc = ', ' if version_info < (2, 6) else ' as '
|
|
self.flakes('''
|
|
try: pass
|
|
except Exception%se: e
|
|
''' % as_exc)
|
|
|
|
self.flakes('''
|
|
def download_review():
|
|
try: pass
|
|
except Exception%se: e
|
|
''' % as_exc)
|
|
|
|
def test_exceptWithoutNameInFunction(self):
|
|
"""
|
|
Don't issue false warning when an unnamed exception is used.
|
|
Previously, there would be a false warning, but only when the
|
|
try..except was in a function
|
|
"""
|
|
self.flakes('''
|
|
import tokenize
|
|
def foo():
|
|
try: pass
|
|
except tokenize.TokenError: pass
|
|
''')
|
|
|
|
def test_exceptWithoutNameInFunctionTuple(self):
|
|
"""
|
|
Don't issue false warning when an unnamed exception is used.
|
|
This example catches a tuple of exception types.
|
|
"""
|
|
self.flakes('''
|
|
import tokenize
|
|
def foo():
|
|
try: pass
|
|
except (tokenize.TokenError, IndentationError): pass
|
|
''')
|
|
|
|
def test_augmentedAssignmentImportedFunctionCall(self):
|
|
"""
|
|
Consider a function that is called on the right part of an
|
|
augassign operation to be used.
|
|
"""
|
|
self.flakes('''
|
|
from foo import bar
|
|
baz = 0
|
|
baz += bar()
|
|
''')
|
|
|
|
@skipIf(version_info < (3, 3), 'new in Python 3.3')
|
|
def test_yieldFromUndefined(self):
|
|
"""
|
|
Test C{yield from} statement
|
|
"""
|
|
self.flakes('''
|
|
def bar():
|
|
yield from foo()
|
|
''', m.UndefinedName)
|
|
|
|
def test_returnOnly(self):
|
|
"""Do not crash on lone "return"."""
|
|
self.flakes('return 2')
|
|
|
|
|
|
class TestAsyncStatements(TestCase):
|
|
|
|
@skipIf(version_info < (3, 5), 'new in Python 3.5')
|
|
def test_asyncDef(self):
|
|
self.flakes('''
|
|
async def bar():
|
|
return 42
|
|
''')
|
|
|
|
@skipIf(version_info < (3, 5), 'new in Python 3.5')
|
|
def test_asyncDefAwait(self):
|
|
self.flakes('''
|
|
async def read_data(db):
|
|
await db.fetch('SELECT ...')
|
|
''')
|
|
|
|
@skipIf(version_info < (3, 5), 'new in Python 3.5')
|
|
def test_asyncDefUndefined(self):
|
|
self.flakes('''
|
|
async def bar():
|
|
return foo()
|
|
''', m.UndefinedName)
|
|
|
|
@skipIf(version_info < (3, 5), 'new in Python 3.5')
|
|
def test_asyncFor(self):
|
|
self.flakes('''
|
|
async def read_data(db):
|
|
output = []
|
|
async for row in db.cursor():
|
|
output.append(row)
|
|
return output
|
|
''')
|
|
|
|
@skipIf(version_info < (3, 5), 'new in Python 3.5')
|
|
def test_asyncWith(self):
|
|
self.flakes('''
|
|
async def commit(session, data):
|
|
async with session.transaction():
|
|
await session.update(data)
|
|
''')
|
|
|
|
@skipIf(version_info < (3, 5), 'new in Python 3.5')
|
|
def test_asyncWithItem(self):
|
|
self.flakes('''
|
|
async def commit(session, data):
|
|
async with session.transaction() as trans:
|
|
await trans.begin()
|
|
...
|
|
await trans.end()
|
|
''')
|