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from pyflakes.messages import IsLiteral
from pyflakes.test.harness import TestCase
class Test(TestCase):
def test_is_str(self):
self.flakes("""
x = 'foo'
if x is 'foo':
pass
""", IsLiteral)
def test_is_bytes(self):
self.flakes("""
x = b'foo'
if x is b'foo':
pass
""", IsLiteral)
def test_is_unicode(self):
self.flakes("""
x = u'foo'
if x is u'foo':
pass
""", IsLiteral)
def test_is_int(self):
self.flakes("""
x = 10
if x is 10:
pass
""", IsLiteral)
def test_is_true(self):
self.flakes("""
x = True
if x is True:
pass
""")
def test_is_false(self):
self.flakes("""
x = False
if x is False:
pass
""")
def test_is_not_str(self):
self.flakes("""
x = 'foo'
if x is not 'foo':
pass
""", IsLiteral)
def test_is_not_bytes(self):
self.flakes("""
x = b'foo'
if x is not b'foo':
pass
""", IsLiteral)
def test_is_not_unicode(self):
self.flakes("""
x = u'foo'
if x is not u'foo':
pass
""", IsLiteral)
def test_is_not_int(self):
self.flakes("""
x = 10
if x is not 10:
pass
""", IsLiteral)
def test_is_not_true(self):
self.flakes("""
x = True
if x is not True:
pass
""")
def test_is_not_false(self):
self.flakes("""
x = False
if x is not False:
pass
""")
def test_left_is_str(self):
self.flakes("""
x = 'foo'
if 'foo' is x:
pass
""", IsLiteral)
def test_left_is_bytes(self):
self.flakes("""
x = b'foo'
if b'foo' is x:
pass
""", IsLiteral)
def test_left_is_unicode(self):
self.flakes("""
x = u'foo'
if u'foo' is x:
pass
""", IsLiteral)
def test_left_is_int(self):
self.flakes("""
x = 10
if 10 is x:
pass
""", IsLiteral)
def test_left_is_true(self):
self.flakes("""
x = True
if True is x:
pass
""")
def test_left_is_false(self):
self.flakes("""
x = False
if False is x:
pass
""")
def test_left_is_not_str(self):
self.flakes("""
x = 'foo'
if 'foo' is not x:
pass
""", IsLiteral)
def test_left_is_not_bytes(self):
self.flakes("""
x = b'foo'
if b'foo' is not x:
pass
""", IsLiteral)
def test_left_is_not_unicode(self):
self.flakes("""
x = u'foo'
if u'foo' is not x:
pass
""", IsLiteral)
def test_left_is_not_int(self):
self.flakes("""
x = 10
if 10 is not x:
pass
""", IsLiteral)
def test_left_is_not_true(self):
self.flakes("""
x = True
if True is not x:
pass
""")
def test_left_is_not_false(self):
self.flakes("""
x = False
if False is not x:
pass
""")
def test_chained_operators_is_true(self):
self.flakes("""
x = 5
if x is True < 4:
pass
""")
def test_chained_operators_is_str(self):
self.flakes("""
x = 5
if x is 'foo' < 4:
pass
""", IsLiteral)
def test_chained_operators_is_true_end(self):
self.flakes("""
x = 5
if 4 < x is True:
pass
""")
def test_chained_operators_is_str_end(self):
self.flakes("""
x = 5
if 4 < x is 'foo':
pass
""", IsLiteral)
def test_is_tuple_constant(self):
self.flakes('''\
x = 5
if x is ():
pass
''', IsLiteral)
def test_is_tuple_constant_containing_constants(self):
self.flakes('''\
x = 5
if x is (1, '2', True, (1.5, ())):
pass
''', IsLiteral)
def test_is_tuple_containing_variables_ok(self):
# a bit nonsensical, but does not trigger a SyntaxWarning
self.flakes('''\
x = 5
if x is (x,):
pass
''')