def METHOD_NAME(
    command_tester_factory: CommandTesterFactory,
    poetry_with_source: Poetry,
    source_one: Source,
    source_two: Source,
) -> None:
    add = command_tester_factory("source add", poetry=poetry_with_source)
    for source in [source_one, source_two]:
        add.execute(f"{source.name} {source.url}")