[issue25449] Test OrderedDict subclass

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

New patch adds PurePythonOrderedDictSubclassTests, moves all tests except test_key_change_during_iteration from CPythonOrderedDictTests to OrderedDictTests to test Python implementation too, fixes a bug in values and items iteration that caused test_issue24347 to fail, and adds additional explicit checks for values() and items() to test_issue24347.

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type: enhancement -> behavior
Added file: http://bugs.python.org/file40832/odict_subclass_test_2.patch

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<http://bugs.python.org/issue25449>
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