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failUnlessWarns assertion from twisted.trial in Twisted 8.0.
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def failUnlessWarns(self, category, message, filename, f,
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Fail if the given function doesn't generate the specified warning when
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called. It calls the function, checks the warning, and forwards the
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result of the function if everything is fine.
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@param category: the category of the warning to check.
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@param message: the output message of the warning to check.
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@param filename: the filename where the warning should come from.
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@param f: the function which is supposed to generate the warning.
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@type f: any callable.
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@param args: the arguments to C{f}.
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@param kwargs: the keywords arguments to C{f}.
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@return: the result of the original function C{f}.
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def warnExplicit(*args):
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warningsShown.append(args)
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origExplicit = warnings.warn_explicit
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warnings.warn_explicit = warnExplicit
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result = f(*args, **kwargs)
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warnings.warn_explicit = origExplicit
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self.fail("No warnings emitted")
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first = warningsShown[0]
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for other in warningsShown[1:]:
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if other[:2] != first[:2]:
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self.fail("Can't handle different warnings")
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gotMessage, gotCategory, gotFilename, lineno = first[:4]
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self.assertEqual(gotMessage, message)
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self.assertIdentical(gotCategory, category)
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# Use starts with because of .pyc/.pyo issues.
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filename.startswith(gotFilename),
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'Warning in %r, expected %r' % (gotFilename, filename))
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# It would be nice to be able to check the line number as well, but
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# different configurations actually end up reporting different line
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# numbers (generally the variation is only 1 line, but that's enough
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# to fail the test erroneously...).
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# self.assertEqual(lineno, xxx)
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from twisted.trial.unittest import TestCase
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TestCase.failUnlessWarns = TestCase.assertWarns = failUnlessWarns
added
removed
Epsilon/epsilon/hotfixes/trial_assertwarns.py
