TestCase.assertRaisesRegex

unittest

method of TestCase (source)

TestCase.assertRaisesRegex(exception, regex, callable, *args, **kwds)
TestCase.assertRaisesRegex(exception, regex, *, msg=None)

Asserts that the message in a raised exception matches a regex.

Args:
    expected_exception: Exception class expected to be raised.
    expected_regex: Regex (re.Pattern object or string) expected
            to be found in error message.
    args: Function to be called and extra positional args.
    kwargs: Extra kwargs.
    msg: Optional message used in case of failure. Can only be used
            when assertRaisesRegex is used as a context manager.

© Python Software Foundation. PSF License Version 2 · Official docs ↗

Changed in 3.1, 3.2, 3.3

3.1: Added under the name assertRaisesRegexp.
3.2: Renamed to assertRaisesRegex().
3.3: Added the msg keyword argument when used as a context manager.