Function do_assert

testing/python/approx.py:62–89

(lhs, rhs, expected_message, verbosity_level=0)

@pytest.fixture
def assert_approx_raises_regex(pytestconfig):
    def do_assert(lhs, rhs, expected_message, verbosity_level=0):
        import re

        with temporary_verbosity(pytestconfig, verbosity_level):
            with pytest.raises(AssertionError) as e:
                assert lhs == approx(rhs)

        nl = "\n"
        obtained_message = str(e.value).splitlines()[1:]
        assert len(obtained_message) == len(expected_message), (
            "Regex message length doesn't match obtained.\n"
            "Obtained:\n"
            f"{nl.join(obtained_message)}\n\n"
            "Expected regex:\n"
            f"{nl.join(expected_message)}\n\n"
        )

        for i, (obtained_line, expected_line) in enumerate(
            zip(obtained_message, expected_message, strict=True)
        ):
            regex = re.compile(expected_line)
            assert regex.match(obtained_line) is not None, (
                "Unexpected error message:\n"
                f"{nl.join(obtained_message)}\n\n"
                "Did not match regex:\n"
                f"{nl.join(expected_message)}\n\n"
                f"With verbosity level = {verbosity_level}, on line {i}"
            )

    return do_assert