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)
There's now also a Firebase Emulator Suite.
Local emulation, at least for the purpose of testing Firestore rules, was demoed at Firebase Summit 2018 using @firestore/testing
and documented under Test your Cloud Firestore Security Rules.
It looks like it's along the lines of:
const firebase = require(`@firebase/testing`)
const app = firebase.initializeTestApp({
projectId: 'my-project',
auth: { uid: '123', email: '[email protected]' }
})
const attempt = app.firestore()
.collection('colId').doc('docId').get()
firebase.assertFails(attempt)
firebase.assertSucceeds(attempt)
It seems early-on, as it's not been noted in the release-notes, but I'm sure it's coming along.