test_xpickle fails on Windows: invokes pythonx.y instead of pythonxy

[5bf59da1-86ec-4384-896c-68455c40bd5f]

BPO	9672
Nosy	@birkenfeld, @pitrou, @avassalotti

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields: ```python assignee = None closed_at = created_at = labels = ['type-bug', 'tests', 'OS-windows'] title = 'test_xpickle fails on Windows: invokes pythonx.y instead of pythonxy' updated_at = user = 'https://bugs.python.org/srid' ``` bugs.python.org fields: ```python activity = actor = 'georg.brandl' assignee = 'none' closed = True closed_date = closer = 'georg.brandl' components = ['Tests', 'Windows'] creation = creator = 'srid' dependencies = [] files = [] hgrepos = [] issue_num = 9672 keywords = [] message_count = 4.0 messages = ['114798', '114799', '115113', '185433'] nosy_count = 5.0 nosy_names = ['georg.brandl', 'collinwinter', 'pitrou', 'alexandre.vassalotti', 'srid'] pr_nums = [] priority = 'normal' resolution = 'works for me' stage = None status = 'closed' superseder = None type = 'behavior' url = 'https://bugs.python.org/issue9672' versions = ['Python 2.7'] ```

[5bf59da1-86ec-4384-896c-68455c40bd5f]

test_xpickle 'python2.4' is not recognized as an internal or external command, operable program or batch file. 'python2.5' is not recognized as an internal or external command, operable program or batch file. 'python2.6' is not recognized as an internal or external command, operable program or batch file.

On Windows, that should be python24.exe (not python2.4.exe).

[5bf59da1-86ec-4384-896c-68455c40bd5f]

On Windows, that should be python24.exe (not python2.4.exe).

Hmm, that is only true for ActivePython. For detecting Python interpreters installed on the system, a simple approach could be to hardcode the full paths, as done by tox: http://code.google.com/p/pytox/source/browse/tox/_venv.py#242

[pitrou]

This is not a failure, it just indicates that the tests get skipped. While I agree that ideally the tests should be able to run on all systems, it should also be noted that the pickle protocols are (supposed to be) platform-agnostic and, therefore, it is not mandatory to run cross-compatibility tests on all platforms.

[birkenfeld]

Closing for reasons Antoine stated.