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.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')

    if have_unicode:

        def test_char_in_unicode(self):

            self.assert_('c' in unicode('abc'))

            self.assert_('d' not in unicode('abc'))

            self.assert_('' in unicode(''))

            self.assert_(unicode('') in '')

            self.assert_(unicode('') in unicode(''))

            self.assert_('' in unicode('abc'))

            self.assert_(unicode('') in 'abc')

            self.assert_(unicode('') in unicode('abc'))

            self.assertRaises(TypeError, lambda: None in unicode('abc'))

            # test Unicode char in Unicode

            self.assert_(unicode('c') in unicode('abc'))

            self.assert_(unicode('d') not in unicode('abc'))

            # test Unicode char in string

            self.assert_(unicode('c') in 'abc')

            self.assert_(unicode('d') not 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()