[issue7897] Support parametrized tests in unittest

[Jean-Paul Calderone]

Jean-Paul Calderone <exarkun at divmod.com> added the comment:

> With paramterized tests *all* the tests are run and *all* failures reported. With testing in a loop the tests stop at the first failure.

+1 to this justification.  Parameterized tests are a big win over a simple for loop in a test.

(However, I haven't looked at the IPython code at all, and Antoine's objection seemed to have something in particular to do with the IPython code?)

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nosy: +exarkun

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