Please, could you demo some Unit Tests with Vitest and Firestore

[ghost]

I ve asked a question here: https://stackoverflow.com/questions/72539977/error-when-using-firestore-and-vitest-i-cannot-add-items-with-firestore-executi

You offer some tests, but I think there is just auth tests concerned. I am looking to use firestore with Vitest and it doesnt work, could you insert an example of a unit test using a firestore CRUD operation ?

Thansk you,

here is my test

import {readFileSync, createWriteStream} from 'fs'
import {initializeTestEnvironment, assertFails, assertSucceeds} from '@firebase/rules-unit-testing'
import {doc, getDoc, setDoc, serverTimestamp, setLogLevel} from 'firebase/firestore'

let db
let app
let testEnv

beforeAll(async () => {
	// const config = {
	// 	apiKey: 'AIzaSyCIFKC20rq6kAglerGHVLQDDqFBrzjmx0M',
	// 	authDomain: 'tinax-app.firebaseapp.com',
	// 	projectId: 'tinax-app'
	// }
	setLogLevel('error')

	testEnv = await initializeTestEnvironment({
		projectId: 'tinax-app',
		firestore: {host: 'localhost', port: 8080}
	})

	// app = initializeApp(config)
	// db = getFirestore(app)
	// if (getApps().length === 0) connectFirestoreEmulator(db, 'localhost', 8080)
})

describe('TESTING TIN--2...', () => {
	it('TEST_1', async () => {
		// [START set_document]
		try {
			await testEnv.withSecurityRulesDisabled(async (context) => {
				await setDoc(doc(context.firestore(), 'users/foobar'), {foo: 'bar'})
			})
			// if (browser) {
			// const docRef = doc(db, 'cities', 'LA')
			// console.log('starting set...')
			// await setDoc(docRef, {
			// 	name: 'Los Angeles',
			// 	state: 'CA',
			// 	country: 'USA'
			// })
			// expect(true).toBeTruthy
			// } else {
			// console.log('cannot exec test in server side')
			// }
		} catch (e) {
			console.log(e)
			// Add a new document in collection "cities"
		}
		// [END set_document]
	}, 10000)
})

and here is the error:

stdout | src/lib/firebase/dao.test.ts > TESTING TIN--2... > TEST_1
[FirebaseError: Expected first argument to collection() to be a CollectionReference, a DocumentReference or FirebaseFirestore] {
  code: 'invalid-argument',
  customData: undefined,
  toString: [Function (anonymous)]
}

[jmagrippis]

Hello @regnou . Great to see you're getting somewhere using SvelteKit and Firebase, and want to do tests with Vitest too! I'm excited for you.

It's worth noting this repo isn't a "starter"... of course, you're free to clone it, or fork it, or copy & paste from it and use it however you want to help you get started if you wish. If I didn't want that, I wouldn't have made it public or link to it from my videos!

But mostly I'm using it as a demo, and to highlight things I wanna show in my videos. If I make a video about using the Firestore, I'll make sure to have a section to talk about testing, and have done the relevant code here to showcase. But as you may know, it does take me a lot of time to make these videos, so I gotta pick the subjects carefully... and I think there are many things I'd want to cover before we get to using the Firestore!

(the video I'm editing currently is on SvelteKit Endpoints for example)

So, I am noting this as a video idea, but just setting expectations that I'm unlikely to act on it...

---

Also: Your issue seems to be around Firebase Unit Testing, it's not Svelte or SvelteKit or Vitest specific! You may have more luck investigating that, maybe that @firebase/rules-unit-testing library?

Alternatively, you could get around all of this if you did E2E testing with Playwright or Cypress instead...

[ghost]

I will try to have it working and I have created a demo for that: https://github.com/regnou/vitest_firebase_demo

Thanks you very much @jmagrippis