Function assertRaises

mypyc/test-data/fixtures/testutil.py:45–52

(typ: type, msg: str = '')

@contextmanager
def assertRaises(typ: type, msg: str = '') -> Iterator[None]:
    try:
        yield
    except BaseException as e:
        assert type(e) is typ, f"{e!r} is not a {typ.__name__}"
        assert msg in str(e), f'Message "{e}" does not match "{msg}"'
    else:
        assert False, f"Expected {typ.__name__} but got no exception"

def assertDomainError() -> Any:
    return assertRaises(ValueError, "math domain error")