Python Either.from_union Examples

Example #1

def test_from_union_fails() -> None:
    with pytest.raises(TypeError):
        Either.from_union([1, 2, 3], int, str)  # type: ignore

Example #2

def test_from_union_right(value: Union[A, B], left_type: Type[A],
                          right_type: Type[B]) -> None:
    assert Either.from_union(value, right_type,
                             left_type) == Either.right(value)