Function test_incorrect_number_exceptions

testing/python/raises_group.py:90–149

()

def test_incorrect_number_exceptions() -> None:
    # We previously gave an error saying the number of exceptions was wrong,
    # but we now instead indicate excess/missing exceptions
    with (
        fails_raises_group(
            "1 matched exception. Unexpected exception(s): [RuntimeError()]"
        ),
        RaisesGroup(ValueError),
    ):
        raise ExceptionGroup("", (RuntimeError(), ValueError()))

    # will error if there's missing exceptions
    with (
        fails_raises_group(
            "1 matched exception. Too few exceptions raised, found no match for: [SyntaxError]"
        ),
        RaisesGroup(ValueError, SyntaxError),
    ):
        raise ExceptionGroup("", (ValueError(),))

    with (
        fails_raises_group(
            "\n"
            "1 matched exception. \n"
            "Too few exceptions raised!\n"
            "The following expected exceptions did not find a match:\n"
            "  ValueError\n"
            "    It matches `ValueError()` which was paired with `ValueError`"
        ),
        RaisesGroup(ValueError, ValueError),
    ):
        raise ExceptionGroup("", (ValueError(),))

    with (
        fails_raises_group(
            "\n"
            "1 matched exception. \n"
            "Unexpected exception(s)!\n"
            "The following raised exceptions did not find a match\n"
            "  ValueError('b'):\n"
            "    It matches `ValueError` which was paired with `ValueError('a')`"
        ),
        RaisesGroup(ValueError),
    ):
        raise ExceptionGroup("", (ValueError("a"), ValueError("b")))

    with (
        fails_raises_group(
            "\n"
            "1 matched exception. \n"
            "The following expected exceptions did not find a match:\n"
            "  ValueError\n"
            "    It matches `ValueError()` which was paired with `ValueError`\n"
            "The following raised exceptions did not find a match\n"
            "  SyntaxError():\n"
            "    `SyntaxError()` is not an instance of `ValueError`"
        ),
        RaisesGroup(ValueError, ValueError),