import json import unittest from proto import pricetag_pb2 class TestCase(unittest.TestCase): def test_pricetag(self): got = pricetag_pb2.PriceTag( name="dollar", cost=5.00, ) metadata = {"description": "some text..."} got.metadata.value = json.dumps(metadata).encode("utf-8") self.assertIsNotNone(got) if __name__ == "__main__": unittest.main()