import unittest

import struct

import sys

from test import test_support, string_tests

class StrTest(

    string_tests.CommonTest,

    string_tests.MixinStrUnicodeUserStringTest,

    string_tests.MixinStrUserStringTest,

    string_tests.MixinStrUnicodeTest,

    ):

    type2test = str

    # We don't need to propagate to str

    def fixtype(self, obj):

        return obj

    def test_formatting(self):

        string_tests.MixinStrUnicodeUserStringTest.test_formatting(self)

        self.assertRaises(OverflowError, '%c'.__mod__, 0x1234)

    def test_conversion(self):

        # Make sure __str__() behaves properly

        class Foo0:

            def __unicode__(self):

                return u"foo"

        class Foo1:

            def __str__(self):

                return "foo"

        class Foo2(object):

            def __str__(self):

                return "foo"

        class Foo3(object):

            def __str__(self):

                return u"foo"

        class Foo4(unicode):

            def __str__(self):

                return u"foo"

        class Foo5(str):

            def __str__(self):

                return u"foo"

        class Foo6(str):

            def __str__(self):

                return "foos"

            def __unicode__(self):

                return u"foou"

        class Foo7(unicode):

            def __str__(self):

                return "foos"

            def __unicode__(self):

                return u"foou"

        class Foo8(str):

            def __new__(cls, content=""):

                return str.__new__(cls, 2*content)

            def __str__(self):

                return self

        class Foo9(str):

            def __str__(self):

                return "string"

            def __unicode__(self):

                return "not unicode"

        self.assert_(str(Foo0()).startswith("<")) # this is different from __unicode__

        self.assertEqual(str(Foo1()), "foo")

        self.assertEqual(str(Foo2()), "foo")

        self.assertEqual(str(Foo3()), "foo")

        self.assertEqual(str(Foo4("bar")), "foo")

        self.assertEqual(str(Foo5("bar")), "foo")

        self.assertEqual(str(Foo6("bar")), "foos")

        self.assertEqual(str(Foo7("bar")), "foos")

        self.assertEqual(str(Foo8("foo")), "foofoo")

        self.assertEqual(str(Foo9("foo")), "string")

        self.assertEqual(unicode(Foo9("foo")), u"not unicode")

    def test_expandtabs_overflows_gracefully(self):

        # This test only affects 32-bit platforms because expandtabs can only take

        # an int as the max value, not a 64-bit C long.  If expandtabs is changed

        # to take a 64-bit long, this test should apply to all platforms.

        if sys.maxint > (1 << 32) or struct.calcsize('P') != 4:

            return

        self.assertRaises(OverflowError, 't\tt\t'.expandtabs, sys.maxint)

def test_main():

    test_support.run_unittest(StrTest)

if __name__ == "__main__":

    test_main()