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

Now you have an option to work with local firestore emulator by setting local host:

var db = firebaseApp.firestore();
if (location.hostname === "localhost") {
  db.settings({
    host: "localhost:8080",
    ssl: false
  });
}

https://firebase.google.com/docs/emulator-suite/connect_and_prototype#instrument_your_app_to_talk_to_the_emulators