Nock makes firebase throw network error

[wendelfreitas]

Im trying to mock some firebase api calls using nock, but when I try to intercept any auth post request, nock makes firebase throw a network request failed error

The application works normally this happens only in tests... i tried every header that i remember too

nock('https://identitytoolkit.googleapis.com/v1', {
        reqheaders: HEADERS,
      })
        .post(
          `/accounts:signInWithPassword?key=${API_KEY}`
        )
        .reply(400);

Error:

    console.error
      FirebaseError: Firebase: Error (auth/network-request-failed).
          at createErrorInternal (/Users/wendel/Projects/Wendel/suwilo/node_modules/@firebase/auth/src/core/util/assert.ts:137:7)
          at _fail (/Users/wendel/Projects/Wendel/suwilo/node_modules/@firebase/auth/src/core/util/assert.ts:65:28)
          at /Users/wendel/Projects/Wendel/suwilo/node_modules/@firebase/auth/src/api/index.ts:184:5
          at step (/Users/wendel/Projects/Wendel/suwilo/node_modules/tslib/tslib.js:144:27)
          at Object.throw (/Users/wendel/Projects/Wendel/suwilo/node_modules/tslib/tslib.js:125:57)
          at rejected (/Users/wendel/Projects/Wendel/suwilo/node_modules/tslib/tslib.js:116:69)
          at processTicksAndRejections (internal/process/task_queues.js:95:5) {
        code: 'auth/network-request-failed',
        customData: {}
      }

Versions

"nock": "^13.2.9",
 "firebase": "^9.12.1",
"react": "^18.2.0",
"react-dom": "^18.2.0",
"jest": "^29.2.0",

[mastermatt]

You're returning a 400. What is the expected behavior from the firebase lib in this case?

[wendelfreitas]

@mastermatt I tried to return a 200 too, same error happens, in this case, firebase needs to return a 400 error with the error code: auth/invalid-email

[mastermatt]

https://firebase.google.com/docs/reference/rest/auth#section-sign-in-email-password

A successful request is indicated by a 200 OK HTTP status code. The response contains the Firebase ID token and refresh token associated with the existing email/password account.

---

Everything seems to be fine with Nock and Firebase SDK, your test setup just needs some updates.

[wendelfreitas]

I dont know what could be, everything is up to date

[mastermatt]

Oh, I didn't mean to start two threads. Anyway...

Sorry, I didn't mean your dependencies needed updates. Your code in the tests is the issue. You're not providing enough mock data as a response to make the firebase lib happy.
A quick glance at their docs, it looks like you should be responding with a 200 and a body that includes values for idToken, email, etc.
Essentially, firebase expects data back when it makes the accounts:signInWithPassword call, but because it wasn't getting any data, it erred.

[wendelfreitas]

Oh got it! sorry!

Yeah, I tried these things too, I saw the docs a lot of times but not worked yet... I appreciate your help I will try some other things later today!

Thank you! ❤️

[wendelfreitas]

I found the problem, you need to mock the exact response for the API otherwise, firebase always throws the auth/network-request-failed, not the best idea to help developers debug, huh?

    nock('https://identitytoolkit.googleapis.com/v1')
      .post(
        `/accounts:signInWithPassword?key=${API_KEY}`,
        {
          email: 'invalid@email.com',
          password: 'invalid@email',
          returnSecureToken: true,
        }
      )
      .reply(400, {
        error: {
          code: 400,
          message: 'EMAIL_NOT_FOUND',
          errors: [
            {
              message: 'EMAIL_NOT_FOUND',
              domain: 'global',
              reason: 'invalid',
            },
          ],
        },
      });

cc @mastermatt

Thanks!