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from test.support import run_unittest
import unittest
class base_set:
def __init__(self, el):
self.el = el
class set(base_set):
def __contains__(self, el):
return self.el == el
class seq(base_set):
def __getitem__(self, n):
return [self.el][n]
class TestContains(unittest.TestCase):
def test_common_tests(self):
a = base_set(1)
b = set(1)
c = seq(1)
self.assert_(1 in b)
self.assert_(0 not in b)
self.assert_(1 in c)
self.assert_(0 not in c)
self.assertRaises(TypeError, lambda: 1 in a)
self.assertRaises(TypeError, lambda: 1 not in a)
# test char in string
self.assert_('c' in 'abc')
self.assert_('d' not in 'abc')
self.assert_('' in '')
self.assert_('' in 'abc')
self.assertRaises(TypeError, lambda: None in 'abc')
def test_builtin_sequence_types(self):
# a collection of tests on builtin sequence types
a = range(10)
for i in a:
self.assert_(i in a)
self.assert_(16 not in a)
self.assert_(a not in a)
a = tuple(a)
for i in a:
self.assert_(i in a)
self.assert_(16 not in a)
self.assert_(a not in a)
class Deviant1:
"""Behaves strangely when compared
This class is designed to make sure that the contains code
works when the list is modified during the check.
"""
aList = range(15)
def __cmp__(self, other):
if other == 12:
self.aList.remove(12)
self.aList.remove(13)
self.aList.remove(14)
return 1
self.assert_(Deviant1() not in Deviant1.aList)
class Deviant2:
"""Behaves strangely when compared
This class raises an exception during comparison. That in
turn causes the comparison to fail with a TypeError.
"""
def __cmp__(self, other):
if other == 4:
raise RuntimeError("gotcha")
try:
self.assert_(Deviant2() not in a)
except TypeError:
pass
def test_main():
run_unittest(TestContains)
if __name__ == '__main__':
test_main()
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