def METHOD_NAME(self):  # type: () -> None
    string_input = taint_pyobject(
        pyobject="foo",
        source_name="test_string_operator_add_two",
        source_value="foo",
        source_origin=OriginType.PARAMETER,
    )
    bar = taint_pyobject(
        pyobject="bar",
        source_name="test_string_operator_add_two",
        source_value="bar",
        source_origin=OriginType.PARAMETER,
    )
    result = mod.do_operator_add_params(string_input, bar)
    assert len(get_tainted_ranges(result)) == 2