Testing rules with emulator in Firebase - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the Firebase emulator for Firestore.

Firebase

firebase emulators:start --only [1]

Drag options to blanks, or click blank then click option'

Afirestore

Bfunctions

Cauth

Ddatabase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'functions' instead of 'firestore' to start the Firestore emulator.

Using 'auth' or 'database' which start other emulators.

The command firebase emulators:start --only firestore starts the Firestore emulator.

2fill in blank

medium

Complete the code to run security rules tests using the Firebase emulator.

Firebase

firebase emulators:exec --only [1] "npm test"

Drag options to blanks, or click blank then click option'

Afunctions

Bfirestore

Cauth

Ddatabase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'functions' which runs cloud functions emulator instead.

Using 'auth' or 'database' which are unrelated to Firestore rules testing.

The firestore emulator is used to run security rules tests for Firestore.

3fill in blank

hard

Fix the error in the command to start the Firestore emulator with the correct port.

Firebase

firebase emulators:start --only firestore --[1] 8080

Drag options to blanks, or click blank then click option'

Aendpoint

Bhost

Caddress

Dport

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'host' or 'address' which specify network address, not port.

Using 'endpoint' which is not a valid flag.

The correct flag to specify the port is --port.

4fill in blank

hard

Fill both blanks to configure the Firestore emulator host and port in the Firebase config.

Firebase

firebase.firestore().settings({ host: '[1]', ssl: false, port: [2] });

Drag options to blanks, or click blank then click option'

Alocalhost

B127.0.0.1

C8080

D5000

Attempts:

3 left

💡 Hint

Common Mistakes

Using IP address instead of 'localhost' for host.

Using wrong port number like 5000.

Use localhost as the host and 8080 as the default Firestore emulator port.

5fill in blank

hard

Fill all three blanks to initialize the Firebase app with emulator settings for Firestore.

Firebase

const app = initializeApp({ apiKey: '[1]', projectId: '[2]' }); const db = getFirestore(app); connectFirestoreEmulator(db, '[3]', 8080);

Drag options to blanks, or click blank then click option'

Afake-api-key

Bdemo-project

Clocalhost

Dreal-api-key

Attempts:

3 left

💡 Hint

Common Mistakes

Using real API keys or project IDs in emulator setup.

Using wrong host instead of 'localhost' for emulator connection.

Use a fake API key and demo project ID for emulator testing, and connect to Firestore emulator on localhost.