(20241212) Added tests to check if everything is up and running.

tests/kafka_test.py

@@ -134,7 +134,7 @@ if __name__ == "__main__":
         while True:
             await asyncio.sleep(1.0)
             messages = await my_consumer.consume(count = 10, timeout = 1.0)
-            for message in messages: print(json.to_string(message["value"]))
+            for message in messages: print("MESSAGE:", json.to_string(message["value"]))
 
     async def main():
         await asyncio.gather(*[keep_producing(), keep_consuming()])