public void TestPutStringState()
        {
            ChaincodeStub stub  = new ChaincodeStub("myc", "txId", handler.Object, new List <ByteString>(), null);
            string        value = "TEST";

            stub.PutStringState("key", value);
            handler.Verify((a) => a.PutStateAsync("myc", "txId", "", "key", ByteString.CopyFromUtf8(value), token));
        }