How to mock service calls Jmeter when using Jms publisher?

Question

I have a Jmeter script that has a JMS publisher to send a payload to an activeMQ queue. When the message is sent to this queue, it goes through the flow and calls different endpoints. I want to be able to mock one of these API endpoints so that when it's called, it will just give generic response with 1 second delay instead of errors or repeating the same call.

Is there any way to achieve this?

Answer 1

We don't know what kind of "API" endpoints are being "called" and what protocols are in scope hence we cannot come up with a comprehensive solution.

• Well-behaved and well-developed systems should allow simple configuration switch which would return a dummy response from an "API endpoint" whatever it means. If it's not the case - I doubt that it makes sense to conduct performance testing because given bad initial architecture I assume that it won't handle even several concurrent threads.
• If you need to just pretend that some endpoint returns something to JMeter - go for Dummy Sampler
• A very simple HTTP mock response can be supplied using JMeter's built-in HTTP Mirror Server
• More comprehensive solution would be using a dedicated mocking tool like WireMock
• If you need to supply a fully functional mock of a JMS endpoint (a real queue or topic) - check out Mocking JMS infrastructure with MockRunner to favour testing article