[issue7897] Support parametrized tests in unittest

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

People interested in this issue might be interested in changeset e6a33938b03f.  I use parameterized unit tests in email a lot, and was annoyed by the fact that I couldn't run the tests individually using the unittest CLI.  The fix for that turned out to be trivial, but by the time I figured it out, I'd already written most of the metaclass.  So since the metaclass reduces the boilerplate (albeit at the cost of looking like black magic), I decided to go with it.  And the metaclass at least avoids the rather questionable use of the "modify locals()" hack I was using before.

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<http://bugs.python.org/issue7897>
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