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""" Checks that reversed() receive proper argument """
# pylint: disable=too-few-public-methods,no-self-use
from collections import deque
__revision__ = 0
class GoodReversed(object):
""" Implements __reversed__ """
def __reversed__(self):
return [1, 2, 3]
class SecondGoodReversed(object):
""" Implements __len__ and __getitem__ """
def __len__(self):
return 3
def __getitem__(self, index):
return index
class BadReversed(object):
""" implements only len() """
def __len__(self):
return 3
class SecondBadReversed(object):
""" implements only __getitem__ """
def __getitem__(self, index):
return index
class ThirdBadReversed(dict):
""" dict subclass """
def test():
""" test function """
seq = reversed()
seq = reversed(None)
seq = reversed([1, 2, 3])
seq = reversed((1, 2, 3))
seq = reversed(set())
seq = reversed({'a': 1, 'b': 2})
seq = reversed(iter([1, 2, 3]))
seq = reversed(GoodReversed())
seq = reversed(SecondGoodReversed())
seq = reversed(BadReversed())
seq = reversed(SecondBadReversed())
seq = reversed(range(100))
seq = reversed(ThirdBadReversed())
seq = reversed(lambda: None)
seq = reversed(deque([]))
seq = reversed("123")
return seq
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