Simplify cleanup decorator implementation. #11292
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Introduce a single private `_cleanup_cm` contextmanager and use it to implement `CleanupTestCase` and `@cleanup`. Use `warnings.catch_warnings` to avoid completely destroying a preexisting warnings filter, instead just restoring the filter that existed before the test started. Use `matplotlib.style.context` to restore the style at exit, as it relies on rc_context which is ultimately more efficient than `rcParams.update` as it skips revalidation. Deprecate CleanupTest (and implement it in terms of CleanupTestCase), as it is clearly a nose-oriented base class that could have been deprecated at the same time as ImageComparisonTest.
Otherwise, rcParams cannot be deprecated without spamming stderr with one warning per test.
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@efiring @tacaswell This PR fixes the warnings issue (and more generally makes it possible, among other things, to deprecate rcParams without jumping through hoops to avoid the same issue arising again). |
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Thank you. All this arcane testing machinery is beyond my knowledge and abilities, but I'm glad to see that it kills the spam. |
timhoffm
approved these changes
May 31, 2018
phobson
approved these changes
Jun 5, 2018
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Introduce a single private
_cleanup_cmcontextmanager and use it toimplement
CleanupTestCaseand@cleanup.Use
warnings.catch_warningsto avoid completely destroying apreexisting warnings filter, instead just restoring the filter that
existed before the test started.
Use
matplotlib.style.contextto restore the style at exit, as itrelies on rc_context which is ultimately more efficient than
rcParams.updateas it skips revalidation.Deprecate CleanupTest (and implement it in terms of CleanupTestCase), as
it is clearly a nose-oriented base class that could have been deprecated
at the same time as ImageComparisonTest.
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