Jest/Testing-Library with RTK-query, msw fails to reset handlers when testing for error case after success case.

Prerequisites

• I confirm my issue is not in the opened issues
• I confirm the Frequently Asked Questions didn’t contain the answer to my issue

Environment check

• I’m using the latest msw version
• I’m using Node.js version 14 or higher

Node.js version

v16.13.1

Reproduction repository

https://github.com/ymoon715/rtk-query-msw

Reproduction steps

clone the repo at https://github.com/ymoon715/rtk-query-msw

npm i
npm run test

Current behavior

I have my tests to reset the handlers after every test. I ran into an error when testing for both success and error cases. If i test error case FIRST, then success SECOND, it all passes.

However, if i test success case FIRST, then error case SECOND, error case fails.

I am using server.use() to test both success and error cases. I have 4 different test files to showcase that testing error case first THEN the success case always works, where as testing success case first THEN the error case always fails

Expected behavior

server.resetHandlers() to successfully reset the handlers, or for us to be able to test for error case after successful cases.

[SaltedCaramelCoffee]

I was running into the same issue when fetching data using SWR. My issue was I was fetching data with the same key, so the first request’s response is cached, and was returned to me in subsequent test runs.

I was able to resolve my issue by providing a clean SWR provider at every render like this:

<SWRConfig value={{ provider: () => new Map() }}>
  { children }
</SWRConfig>

From what I can see in the RTK docs, looks like RTK does something similar and caches response data based on some key. You might be able to solve your problem if you figure out how to invalidate cache and re-fetch for each test case even if you’re using the same key.

[Jucian0]

For me the problem was that React Query by default retry when a request fails, so, I disabled that in tests, @ymoon715, probably RTK works in the same way.