Anagram: relax test requirement for ordered elements

[roadfoodr]

See issue #1826.

• Tested against reference solution and own solution.
• Tested full track-level test suite.

Note: this implementation uses assertCountEqual(), first available in Python 3.2.

"Update tests to v1.4.1" references: exercism/problem-specifications#1534

[yawpitch]

Thanks for working towards improving the tests, I agree there’s no reason to worry about the sorted order of the results, however we can’t drop Python 2 comparability completely just yet.

Could you please insert this at the top of the file, after the imports:

# Python 2/3 compatibility
if not hasattr(unittest.TestCase, 'assertCountEqual'):
    unittest.TestCase.assertCountEqual = unittest.TestCase.assertItemsEqual

We’ve used it in other exercises to the same end.

[roadfoodr]

Done, thanks. (I was wondering about compatibility since README.md describes the use of assertIs(), also new in Python 3.)

[yawpitch]

The TestCase.assertIs method was added to 2.7 some time ago, so no compatibility issue there.

@cmccandless I’d say this one is ready to (squash and) merge.

[cmccandless]

Merged; thanks for working on this!