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def runpytest_with_assert_mode(testdir, request, *args):
"""
Calls `runpytest` if possible, otherwise calls `runpytest_subprocess`.
Calling `runpytest` when the caller is run with --assert=rewrite and the callee is run with --assert=plain
or vice versa does not work correctly, so this wrapper calls `runpytest_subprocess` in these cases.
Note: If you are trying to debug a test that reaches `runpytest_subprocess`, consider running the test with another
--assert mode.
"""
if '--assert=plain' in args:
assert_mode = 'plain'
elif '--assert=rewrite' in args:
assert_mode = 'rewrite'
else:
raise ValueError('Use this function only if you require --assert=rewrite or --assert=plain')
if assert_mode == request.config.option.assertmode:
return testdir.runpytest(*args)
else:
return testdir.runpytest_subprocess(*args)
def assert_pytest_passes(testdir):
result = testdir.runpytest('-v')
result.stdout.fnmatch_lines(['*::test_sth PASSED*'])
assert result.ret == 0
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