Changing port on the firestore emulator makes tests not work

[liana-p]

If I try to run the emulator on port 6767, with the following firebase.json:

{
  "firestore": {
    "rules": "firestore.rules"
  },
  "emulators": {
    "firestore": {
      "port": "6767"
    }
  }
}

I get the following:

> mocha --timeout=10000



  1) "before all" hook
View rule coverage information at http://localhost:6767/emulator/v1/projects/firestore-emulator-example:ruleCoverage.html


  0 passing (21ms)
  1 failing

  1) "before all" hook:
     Error: 14 UNAVAILABLE: Connect Failed
      at Object.exports.createStatusError (node_modules/grpc/src/common.js:91:15)
      at Object.onReceiveStatus (node_modules/grpc/src/client_interceptors.js:1204:28)
      at InterceptingListener._callNext (node_modules/grpc/src/client_interceptors.js:568:42)
      at InterceptingListener.onReceiveStatus (node_modules/grpc/src/client_interceptors.js:618:8)
      at callback (node_modules/grpc/src/client_interceptors.js:845:24)



npm ERR! Test failed.  See above for more details.

If I remove the block with the port in firebase.json:

{
  "firestore": {
    "rules": "firestore.rules"
  }
}

And change the port to 8080, the test passes.

> mocha --timeout=10000



  MyApp
    ✓ require users to log in before creating a profile (447ms)

View rule coverage information at http://localhost:8080/emulator/v1/projects/firestore-emulator-example:ruleCoverage.html


  1 passing (1s)

[samtstern]

@nialna I assume you're using the @firebase/testing SDK?

If so can you try either of these two things:

1. Set the FIRESTORE_EMULATOR_HOST environment variable:

FIRESTORE_EMULATOR_HOST=localhost:6767 mocha --timeout=1000

2. Use the emulators:exec command which does (1) automatically:

firebase emulators:exec "mocha --timeout=10000"

[liana-p]

I got it to work, but making firebase emulators:exec use mocha directly didn't work:

 firebase emulators:exec "mocha --timeout=10000"                                                   2.73 L  192.168.1.112 IP  OSX
i  Starting emulators: ["firestore"]
i  firestore: Serving WebChannel traffic on at http://localhost:6768
i  firestore: Emulator logging to firestore-debug.log
✔  firestore: Emulator started at http://localhost:6767
i  firestore: For testing set FIRESTORE_EMULATOR_HOST=localhost:6767
i  Running script: mocha --timeout=10000
/bin/sh: mocha: command not found
⚠  Script exited unsuccessfully (code 127)
i  Shutting down emulators.
i  Stopping firestore emulator

Error: Script "mocha --timeout=10000" exited with code 127

I also tried installing mocha globally, but then this happened:

✖ ERROR: Cannot find module 'source-map-support/register'
⚠  Script exited unsuccessfully (code 1)
i  Shutting down emulators.
i  Stopping firestore emulator

Error: Script "mocha --timeout=10000" exited with code 1

Having trouble? Try firebase emulators:exec --help

The way I actually got it to work was by just making firebase run the npm task itself:

firebase emulators:exec "npm test"

It might be worth explaining this workflow in the documentation though.

(As for the specific SDK, I basically copied this repo and modified the code in it, so yes)

[samtstern]

@nialna glad you got it working! Yeah emulators:exec "npm test" is exactly how we intend this to be used.

We have some documentation on this here, but you're right that we need to make it more prominent:
https://firebase.google.com/docs/emulator-suite/connect_and_prototype#using_a_more_automated_process