Running Firestore local e.g. for testing

Question

Is there a way to run firestore locally (e.g. for testing purposes)?

What would the approach to write tests against the DB (except of using mocks)

Answer 1

Firestore can be setup in local using gcloud.

Start the firestore emulator by running gcloud beta emulators firestore start --host-port=localhost:8081 and if it started successfully you will be seeing Dev App Server is now running

In case if you are using @google-cloud/firestore then create the Firestore instance in this way

// Firestore instance only for test env
const { Firestore } = require('@google-cloud/firestore')
const instance = new Firestore({ projectId; 'Your project id', host: 'localhost', 'port': 8081})