We will now test the Lambda created in the previous section:

1. Send a messages to the topic.
2. Verify the invocation by retrieving the message from the output queue:

aws sqs receive-message 
    --queue-url https://queue.amazonaws.com/<account id>/my-output-queue 
    --max-number-of-messages 5 
    --profile admin

If successful, you should get the message that you posted to the topic. You can also verify the invocation details from CloudWatch logs.