view Lib/test/test_userstring.py @ 87690:66c1c9f32567 default tip

Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents 55383912c225
children
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#!/usr/bin/env python3
# UserString is a wrapper around the native builtin string type.
# UserString instances should behave similar to builtin string objects.

import string
import unittest
from test import support, string_tests

from collections import UserString

class UserStringTest(
    string_tests.CommonTest,
    string_tests.MixinStrUnicodeUserStringTest,
    unittest.TestCase
    ):

    type2test = UserString

    # Overwrite the three testing methods, because UserString
    # can't cope with arguments propagated to UserString
    # (and we don't test with subclasses)
    def checkequal(self, result, object, methodname, *args, **kwargs):
        result = self.fixtype(result)
        object = self.fixtype(object)
        # we don't fix the arguments, because UserString can't cope with it
        realresult = getattr(object, methodname)(*args, **kwargs)
        self.assertEqual(
            result,
            realresult
        )

    def checkraises(self, exc, object, methodname, *args):
        object = self.fixtype(object)
        # we don't fix the arguments, because UserString can't cope with it
        self.assertRaises(
            exc,
            getattr(object, methodname),
            *args
        )

    def checkcall(self, object, methodname, *args):
        object = self.fixtype(object)
        # we don't fix the arguments, because UserString can't cope with it
        getattr(object, methodname)(*args)


if __name__ == "__main__":
    unittest.main()