How to test `functions.https.onCall` firebase cloud functions locally?

Question

I can't seem to find the solution for this in the Firebase Documentation.

I want to test my functions.https.onCall functions locally. Is it possible using the shell or somehow connect my client (firebase SDK enabled) to the local server?

I want to avoid having to deploy every time just to test a change to my onCall functions.

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My code

Function :

exports.myFunction = functions.https.onCall((data, context) => {   // Do something }); 

Client:

const message = { message: 'Hello.' };  firebase.functions().httpsCallable('myFunction')(message)   .then(result => {     // Do something //   })   .catch(error => {     // Error handler //   }); 

Answer 1

For locally you must call (after firebase.initializeApp)

firebase.functions().useFunctionsEmulator('http://localhost:5000')