def METHOD_NAME(source, target, old_docs, new_docs):
    source.update(old_docs)
    source.update(new_docs)
    target.update(old_docs)
    builder = CopyBuilder(source, target)
    builder.run()
    builder.target.connect()
    assert builder.target.query_one(criteria={"k": 0})["v"] == "new"
    assert builder.target.query_one(criteria={"k": 10})["v"] == "old"