def METHOD_NAME():
    data = {"key_1": "v1", "key_2": "v2", "key_3": "v3"}
    form = ".{}:{}"
    keys, serialized_data = serialize_dict(data, form)
    assert Counter(keys) == Counter(data.keys())
    data_parts = serialized_data.split(".")[1:]
    for index, part in enumerate(data_parts):
        key, value = part.split(":")
        assert key == keys[index]
        assert value == data[key]