Callable function in emulator returns 'unauthenticated' when passing in mock auth via firebase/testing lib

Not sure if this is the right place for this report, or if perhaps I am using the emulators/sdk incorrectly. I would like to write some integration tests and run against the Firebase emulator suite. I found the docs on testing security rules helpful, and it seems like the intention of the @firebase/testing library is to allow testing of functions/database beyond just security rules.

That doc outlines how to mock authentication by passing and auth dictionary to initializeTestApp(..), but when I use the resulting app to call an httpsCallable function, the emulator returns an ‘unauthenticated’ error.

[REQUIRED] Environment info

firebase-tools: 7.0.2 Platform: macOS 10.14.5

[REQUIRED] Test case

Here is a minimal reproduction: https://github.com/ryanmeisters/firebase-callable-emulator-test

It contains a single helloCallable function that returns {hello: "world"}, and a single test that calls the function and verifies the response. The test passes when no auth is passed into initializeTestApp, but gets ‘unauthenticated’ error if auth is passed.

[REQUIRED] Steps to reproduce

1. Clone the above repo and npm install
2. in the root run ./emulate.sh (compiles typescript and runs emulators)
3. cd functions && npm run test # test fails with 'unauthenticated'
4. comment out this line and npm run test again. Test passes

[REQUIRED] Expected behavior

The callable function should be called and receive the mock auth dictionary

[REQUIRED] Actual behavior

Function returns and unauthenticated error.

Output of firebase emulators:start --debug and function call

➜  FirebaseTestingCallable git:(master) ./emulate.sh

> functions@ build /Users/ryan/Projects/FirebaseTestingCallable/functions
> tsc

[2019-07-06T17:00:46.379Z] ----------------------------------------------------------------------
[2019-07-06T17:00:46.382Z] Command:       /Users/ryan/.nvm/versions/node/v8.15.1/bin/node /Users/ryan/.nvm/versions/node/v8.15.1/bin/firebase emulators:start --debug
[2019-07-06T17:00:46.382Z] CLI Version:   7.0.2
[2019-07-06T17:00:46.382Z] Platform:      darwin
[2019-07-06T17:00:46.382Z] Node Version:  v8.15.1
[2019-07-06T17:00:46.383Z] Time:          Sat Jul 06 2019 10:00:46 GMT-0700 (PDT)
[2019-07-06T17:00:46.383Z] ----------------------------------------------------------------------

[2019-07-06T17:00:46.392Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[2019-07-06T17:00:46.392Z] > authorizing via signed-in user
[2019-07-06T17:00:46.394Z] > refreshing access token with scopes: ["email","https://www.googleapis.com/auth/cloud-platform","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","openid"]
[2019-07-06T17:00:46.394Z] >>> HTTP REQUEST POST https://www.googleapis.com/oauth2/v3/token
 <request body omitted>
[2019-07-06T17:00:46.686Z] <<< HTTP RESPONSE 200 content-type=application/json; charset=utf-8, vary=X-Origin, Referer, Origin,Accept-Encoding, date=Sat, 06 Jul 2019 17:00:46 GMT, server=scaffolding on HTTPServer2, cache-control=private, x-xss-protection=0, x-frame-options=SAMEORIGIN, x-content-type-options=nosniff, alt-svc=quic=":443"; ma=2592000; v="46,43,39", accept-ranges=none, transfer-encoding=chunked
[2019-07-06T17:00:46.697Z] >>> HTTP REQUEST GET https://cloudresourcemanager.googleapis.com/v1/projects/testproject-dbefa

[2019-07-06T17:00:47.139Z] <<< HTTP RESPONSE 200 content-type=application/json; charset=UTF-8, vary=X-Origin, Referer, Origin,Accept-Encoding, date=Sat, 06 Jul 2019 17:00:47 GMT, server=ESF, cache-control=private, x-xss-protection=0, x-frame-options=SAMEORIGIN, x-content-type-options=nosniff, server-timing=gfet4t7; dur=252, alt-svc=quic=":443"; ma=2592000; v="46,43,39", accept-ranges=none, transfer-encoding=chunked
i  Starting emulators: ["functions","firestore"]
✔  functions: Using node@8 from host.
[2019-07-06T17:00:47.157Z] >>> HTTP REQUEST GET https://mobilesdk-pa.googleapis.com/v1/projects/1077985712794:getServerAppConfig

[2019-07-06T17:00:47.450Z] <<< HTTP RESPONSE 200 content-type=application/json; charset=UTF-8, vary=X-Origin, Referer, Origin,Accept-Encoding, date=Sat, 06 Jul 2019 17:00:47 GMT, server=ESF, cache-control=private, x-xss-protection=0, x-frame-options=SAMEORIGIN, x-content-type-options=nosniff, alt-svc=quic=":443"; ma=2592000; v="46,43,39", accept-ranges=none, transfer-encoding=chunked
✔  functions: Emulator started at http://localhost:5001
[2019-07-06T17:00:47.716Z] Starting emulator firestore with args {"host":"localhost","port":8080,"rules":"/Users/ryan/Projects/FirebaseTestingCallable/firestore.rules","functions_emulator":"localhost:5001"}
i  firestore: Logging to firestore-debug.log
✔  firestore: Emulator started at http://localhost:8080
[2019-07-06T17:00:48.406Z] API endpoint: http://localhost:8080
[2019-07-06T17:00:48.406Z]
If you are using a library that supports the FIRESTORE_EMULATOR_HOST environment variable, run:

   export FIRESTORE_EMULATOR_HOST=localhost:8080

Dev App Server is now running.


i  firestore: For testing set FIRESTORE_EMULATOR_HOST=localhost:8080
i  functions: Watching "/Users/ryan/Projects/FirebaseTestingCallable/functions" for Cloud Functions...
[2019-07-06T17:00:48.674Z] Functions runtime initialized.
[2019-07-06T17:00:48.675Z] Disabled runtime features: undefined
[2019-07-06T17:00:48.795Z] Found google-gax at /Users/ryan/Projects/FirebaseTestingCallable/functions/node_modules/google-gax/build/src/index.js
[2019-07-06T17:00:48.795Z] Outgoing network have been stubbed.
[2019-07-06T17:00:48.823Z] Checked functions.config()
[2019-07-06T17:00:48.826Z] firebase-admin has been stubbed.
[2019-07-06T17:00:48.827Z] config() parent accessed!
i  functions: HTTP trigger initialized at http://localhost:5001/testproject-dbefa/us-central1/helloCallable
[2019-07-06T17:01:11.648Z] File /Users/ryan/Projects/FirebaseTestingCallable/functions/lib/index.tests.js.map changed, reloading triggers
[2019-07-06T17:01:11.648Z] File /Users/ryan/Projects/FirebaseTestingCallable/functions/lib/index.tests.js changed, reloading triggers
[2019-07-06T17:01:11.649Z] File /Users/ryan/Projects/FirebaseTestingCallable/functions/lib/index.js.map changed, reloading triggers
[2019-07-06T17:01:11.649Z] File /Users/ryan/Projects/FirebaseTestingCallable/functions/lib/index.js changed, reloading triggers
[2019-07-06T17:01:12.794Z] Accepted request POST /testproject-dbefa/us-central1/helloCallable --> helloCallable
[2019-07-06T17:01:12.838Z] Functions runtime initialized.
[2019-07-06T17:01:12.839Z] Disabled runtime features: undefined
[2019-07-06T17:01:12.955Z] Found google-gax at /Users/ryan/Projects/FirebaseTestingCallable/functions/node_modules/google-gax/build/src/index.js
[2019-07-06T17:01:12.955Z] Outgoing network have been stubbed.
[2019-07-06T17:01:12.987Z] Checked functions.config()
[2019-07-06T17:01:12.987Z] Functions runtime initialized.
i  functions: Beginning execution of "helloCallable"
[2019-07-06T17:01:12.988Z] Disabled runtime features: undefined
[2019-07-06T17:01:12.989Z] firebase-admin has been stubbed.
[2019-07-06T17:01:12.989Z] config() parent accessed!
[2019-07-06T17:01:13.101Z] Found google-gax at /Users/ryan/Projects/FirebaseTestingCallable/functions/node_modules/google-gax/build/src/index.js
[2019-07-06T17:01:13.101Z] Outgoing network have been stubbed.
[2019-07-06T17:01:13.130Z] Checked functions.config()
[2019-07-06T17:01:13.131Z] firebase-admin has been stubbed.
[2019-07-06T17:01:13.132Z] config() parent accessed!
[2019-07-06T17:01:13.133Z] Trigger "helloCallable" has been found, beginning invocation!
[2019-07-06T17:01:13.133Z]
[2019-07-06T17:01:13.133Z] Running helloCallable in mode HTTPS
[2019-07-06T17:01:13.139Z] {"socketPath":"/var/folders/8j/lw39pjg97xbckxh0bk7rtw8r0000gn/T/firebase_emulator_invocation_74956.sock"}

Output of npm run test

➜  functions git:(master) ✗ npm run test

> functions@ test /Users/ryan/Projects/FirebaseTestingCallable/functions
> tsc && ava -v --serial


  ✖ we are able to call the callable function Rejected promise returned by test

  1 test failed

  we are able to call the callable function

  /Users/ryan/Projects/FirebaseTestingCallable/functions/node_modules/@firebase/functions/src/api/error.ts:66

  Rejected promise returned by test. Reason:

  Error (HttpsErrorImpl) {
    code: 'unauthenticated',
    details: undefined,
    message: 'Unauthenticated',
  }

  new HttpsErrorImpl (node_modules/@firebase/functions/src/api/error.ts:66:5)
  _errorForResponse (node_modules/@firebase/functions/src/api/error.ts:175:10)
  Service.<anonymous> (node_modules/@firebase/functions/src/api/service.ts:226:19)
  step (node_modules/tslib/tslib.js:133:27)
  Object.next (node_modules/tslib/tslib.js:114:57)
  fulfilled (node_modules/tslib/tslib.js:104:62)

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! functions@ test: `tsc && ava -v --serial`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the functions@ test script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/ryan/.npm/_logs/2019-07-06T17_01_13_235Z-debug.log

[samtstern]

@ryanmeisters by the way you can check if (process.env.FUNCTIONS_EMULATOR) to know when your code is running in the emulator and when it’s not

[samtstern]

Version 7.16.2 has been released.