How to invoke firebase Schedule functions locally using pubsub emulator

问题

I am working on cloud functions especially schedule functions. I need to trigger a function periodically each 5 minutes, but in only test step. I need to run it on pubsub emulator without deploying it.

How to do it?

I tried to use firebase shell, but it triggered only once

 exports.scheduledFunctionPlainEnglish =functions.pubsub.schedule('every 2 minutes')
 .onRun((context) => {
    functions.logger.log("this runs every 2 minutes")
    return null;
}) 

回答1:

This is currently not supported for scheduled functions. The documentation states:

Using the shell, you mock data and perform function calls to simulate interaction with products that the Emulator Suite does not currently support: Storage, PubSub, Analytics, Remote Config, Storage, Auth, and Crashlytics.

Scheduled functions are an unsupported extension of pubsub triggers.

Feel free to file a feature request with Firebase support.

回答2:

As you said, you can use firebase shell to run your function once. And in firebase shell, you can use NodeJS commands.

Use setInterval

Inside firebase functions:shell, use setInterval to run your function every 2 minutes.

user@laptop:~$ firebase functions:shell

✔  functions: functions emulator started at http://localhost:5000
i  functions: Loaded functions: myScheduledFunction
firebase > setInterval(() => myScheduledFunction(), 120000)

> this runs every 2 minutes

Single line script

In Bash, you can even pipe the setInterval command to firebase shell

user@laptop:~$ echo "setInterval(() => myScheduledFunction(), 120000)" | firebase functions:shell

来源：https://stackoverflow.com/questions/62759093/how-to-invoke-firebase-schedule-functions-locally-using-pubsub-emulator