how to test Cloud Functions for Firebase locally on pc

Question

Today Firebase released its brand new product Cloud Functions for Firebase and I just created a hello world function and deploy it on my existing firebase project.

I

Answer 1

run and debug/inspect functions locally

prerequisites (google-cloud functions and firebase-specific):

npm install -g @google-cloud/functions-emulator
npm install --save firebase-functions
npm install -g firebase-tools

To run and inspect/debug: first run functions locally, then inspect each function, and finally run each specific function to debug+inspect it. Use functions start as an alternative to firebase serve and note the documentation for each tool is available (and useful).

To run and debug the specific function myFn as-expected (eg in Nodejs via chrome://inspect and note this works using Nodejs v10 though not officially supported):

firebase serve --only functions
functions inspect myFn
functions call myFn # or call from browser

additional documentation:

https://firebase.google.com/docs/functions/local-emulator https://cloud.google.com/functions/docs/emulator#debug-emulator https://github.com/GoogleCloudPlatform/cloud-functions-emulator/wiki