mirror of https://github.com/python/cpython
71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
# UserString is a wrapper around the native builtin string type.
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# UserString instances should behave similar to builtin string objects.
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import unittest
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from test import string_tests
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from collections import UserString
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class UserStringTest(
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string_tests.CommonTest,
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string_tests.MixinStrUnicodeUserStringTest,
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unittest.TestCase
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):
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type2test = UserString
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# Overwrite the three testing methods, because UserString
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# can't cope with arguments propagated to UserString
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# (and we don't test with subclasses)
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def checkequal(self, result, object, methodname, *args, **kwargs):
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result = self.fixtype(result)
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object = self.fixtype(object)
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# we don't fix the arguments, because UserString can't cope with it
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realresult = getattr(object, methodname)(*args, **kwargs)
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self.assertEqual(
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result,
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realresult
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)
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def checkraises(self, exc, obj, methodname, *args):
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obj = self.fixtype(obj)
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# we don't fix the arguments, because UserString can't cope with it
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with self.assertRaises(exc) as cm:
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getattr(obj, methodname)(*args)
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self.assertNotEqual(str(cm.exception), '')
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def checkcall(self, object, methodname, *args):
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object = self.fixtype(object)
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# we don't fix the arguments, because UserString can't cope with it
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getattr(object, methodname)(*args)
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def test_rmod(self):
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class ustr2(UserString):
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pass
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class ustr3(ustr2):
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def __rmod__(self, other):
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return super().__rmod__(other)
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fmt2 = ustr2('value is %s')
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str3 = ustr3('TEST')
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self.assertEqual(fmt2 % str3, 'value is TEST')
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def test_encode_default_args(self):
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self.checkequal(b'hello', 'hello', 'encode')
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# Check that encoding defaults to utf-8
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self.checkequal(b'\xf0\xa3\x91\x96', '\U00023456', 'encode')
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# Check that errors defaults to 'strict'
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self.checkraises(UnicodeError, '\ud800', 'encode')
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def test_encode_explicit_none_args(self):
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self.checkequal(b'hello', 'hello', 'encode', None, None)
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# Check that encoding defaults to utf-8
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self.checkequal(b'\xf0\xa3\x91\x96', '\U00023456', 'encode', None, None)
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# Check that errors defaults to 'strict'
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self.checkraises(UnicodeError, '\ud800', 'encode', None, None)
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if __name__ == "__main__":
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unittest.main()
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