如何在 GitHub 操作上使用 Cypress CI 运行和连接到仿真器？

Question

I am trying to run e2e Cypress tests on Github actions. I build functions, run an emulator and start cypress like to: npx nx build functions | firebase emulators:start | nx e2e frontend-e2e --watch npx nx build functions | firebase emulators:start | nx e2e frontend-e2e --watch

This works well on localhost, but fails on GitHub Actions, when the first part of the code tries to connect to the emulators.

  cy.request(
    "DELETE",
    "http://localhost:9099/emulator/v1/projects/****/accounts"
  );

It can't reach the emulator on port localhost:9099 , as I would normally do on localhost.

  1) Login
       runs setup:
     CypressError: `cy.request()` failed trying to load:

http://localhost:9099/emulator/v1/projects/****/accounts

We attempted to make an http request to this URL but the request failed without a response.

Is there something I need to do about connecting to localhost port on GitHub Actions ?

Answer 1

Solved, The Firebase emulator was throwing an error: but I haven't seen it because I ran it on one line with other commands: npx nx build functions | firebase emulators:start | nx e2e frontend-e2e --watch npx nx build functions | firebase emulators:start | nx e2e frontend-e2e --watch

I rewrote the job in the workflow:

      - name: Cypress run
        uses: cypress-io/github-action@v2
        with:
          browser: chrome
          build: npm run integration:build
          start: |
            npm run integration:emulate
            npm run integration:test

Calling custom scripts from package.json like so:

    "integration:build": "nx build functions && nx run frontend:build",
    "integration:emulate": "firebase use default && firebase emulators:start",
    "integration:test": "nx e2e frontend-e2e --watch",

Then I could see the Firebase error in the log and fixed them. There were two issues:

1. Selecting a project before running the emulators (adding firebase use default )
2. Firebase login ( great answer from the Firebase team )

After that, the emulators worked just as on localhost