Ronald Oussoren added the comment:
That's correct, I have a test like:
def test_something(self):
for info in CASES:
with self.subTest(info):
self.assert_something(info)
For some values of 'info' the test is known to fail and I want to mark those as
exptectedFailure somehow and there doesn't appear to be a way to do so right
now.
I'm currently doing:
with self.subTest(info):
try:
... # actual test
except:
if info in KNOWN_FAILURES:
self.skipTest()
raise
That suppresses the test failures, but in an unclean way and without getting a
warning when the testcase starts working again.
I could generate testcases manually the old fashioned way without using
subTest, but that results in more complicated test code and requires rewriting
a number of tests.
One possible design for making it possible to mark subTests as known failures
it to return a value in the subTest context manager that has a method for
marking the subTest:
with self.subTest(...) as tc:
if ...:
tc.expectedFailure(...)
... # actual test
I don't know how invasive such a change would be.
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<http://bugs.python.org/issue30997>
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