Скачать или смотреть How to Instruct Your Locally Emulated Firebase Function to Use the Authentication Emulator

Discover how to direct your Firebase functions to utilize the `authentication emulator` locally for efficient testing and development.
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Instructing Your Locally Emulated Firebase Function to Use the Authentication Emulator

If you're utilizing the Firebase Emulator Suite for application testing, you may encounter situations where your Firebase functions interact with the service in ways you didn't anticipate. One common issue developers face is needing to connect their Firebase functions to the authentication emulator to ensure that users are created locally rather than in the production environment. Let’s break down the challenge and provide you with a clear, step-by-step solution.

The Challenge

You have correctly set up emulators for hosting, authentication, Firebase functions, and everything seems to function well when you create users from the front end using the following command:

[[See Video to Reveal this Text or Code Snippet]]

However, when calling a Firebase function that creates a user, the new user gets registered in the production environment instead of the local authentication emulator. This is problematic as you might want to run tests without affecting your live data, and it prevents you from triggering any subsequent authentication functions that depend on the local emulator.

The Solution

Step 1: Update the Firebase Admin Package

The first action you need to take is to ensure that your Firebase Admin SDK is updated to the latest version. As of this writing, version 9.9.0 includes support for the Firebase authentication emulator. You can update your package using npm with the following command:

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Step 2: Configure the Authentication Emulator in Your Code

Once your Firebase Admin SDK is updated, you'll need to instruct it to use the authentication emulator. You do this by configuring the SDK appropriately within your function code. Below is an example setup when handling the user creation function:

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Step 3: Verify Your Emulator Connection

After ensuring that you are connecting to the authentication emulator, perform the following checks:

Check Emulator Status: Ensure that the emulator is running by checking your terminal output or the Firebase Emulator Suite UI.

Test User Creation: Test the user creation function from your front end and observe the logs to ensure that it registers the user locally.

Step 4: Create Related Functions for User Management

You might also want to ensure you can track user-related events like user creation which can be done with a trigger like this:

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This function will now work with the emulator as intended, creating user documents in Firestore upon user creation.

Conclusion

By updating your Firebase Admin SDK and ensuring you're pointing to the local authentication emulator in your function code, you can effectively conduct your testing without interfacing with the production environment. Make sure to frequently check your dependencies and the function's environment as you proceed with the development using emulators. Happy coding!