server.resetHandlers before each test

[gvocale]

I am mocking GraphQL requests made server side with Next.js getServerSideProps hook via setupServe(...handlers) following the example provided by Next.js https://github.com/vercel/next.js/tree/canary/examples/with-msw.

I would like to reset a specific resolver before each Cypress test to test different data scenarios. Is there a way to trigger server.resetHandlers from a before hook into a Cypress test?

I have found this stack overflow answer https://stackoverflow.com/questions/47631821/mocking-server-for-ssr-react-app-e2e-tests-with-cypress-io using MockTTP.

Is it possible to do the same with msw?

[kettanaito]

You can call window.worker.resetHandlers() as long as you propagate the created worker on the window object.

// your-app.js
const worker = setupWorker(...handlers)
window.worker = worker

// your.test.js
before(async () => {
  await cy.window().then((win) => {
    // Resetting handlers is a synchronous action.
    win.worker.resetHandlers()
  })
})

The usage is the same as with the runtime request handlers with Cypress.