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from test.test_support import have_unicode, 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.assertIn(1, b)
self.assertNotIn(0, b)
self.assertIn(1, c)
self.assertNotIn(0, c)
self.assertRaises(TypeError, lambda: 1 in a)
self.assertRaises(TypeError, lambda: 1 not in a)
# test char in string
self.assertIn('c', 'abc')
self.assertNotIn('d', 'abc')
self.assertIn('', '')
self.assertIn('', 'abc')
self.assertRaises(TypeError, lambda: None in 'abc')
if have_unicode:
def test_char_in_unicode(self):
self.assertIn('c', unicode('abc'))
self.assertNotIn('d', unicode('abc'))
self.assertIn('', unicode(''))
self.assertIn(unicode(''), '')
self.assertIn(unicode(''), unicode(''))
self.assertIn('', unicode('abc'))
self.assertIn(unicode(''), 'abc')
self.assertIn(unicode(''), unicode('abc'))
self.assertRaises(TypeError, lambda: None in unicode('abc'))
# test Unicode char in Unicode
self.assertIn(unicode('c'), unicode('abc'))
self.assertNotIn(unicode('d'), unicode('abc'))
# test Unicode char in string
self.assertIn(unicode('c'), 'abc')
self.assertNotIn(unicode('d'), 'abc')
def test_builtin_sequence_types(self):
# a collection of tests on builtin sequence types
a = range(10)
for i in a:
self.assertIn(i, a)
self.assertNotIn(16, a)
self.assertNotIn(a, a)
a = tuple(a)
for i in a:
self.assertIn(i, a)
self.assertNotIn(16, a)
self.assertNotIn(a, 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.assertNotIn(Deviant1(), 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.assertNotIn(Deviant2(), a)
except TypeError:
pass
def test_main():
run_unittest(TestContains)
if __name__ == '__main__':
test_main()