Test - FirebaseApp is not initialized in this process

Question

I'm trying to run a test with Robolectric and it has an integration with Firebase. I have a project MyProject - Test that I'll be using to run the tests in a real instance of the database.

The problem is that, when running cleanup before test, I have the error:

java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process null. Make sure to call FirebaseApp.initializeApp(Context) first.

at com.google.firebase.FirebaseApp.getInstance(Unknown Source)
at com.google.firebase.database.FirebaseDatabase.getInstance(Unknown Source)
at com.cgbros.silkhub.activity.listener.LoginActivityUnitTest.cleanUp(LoginActivityUnitTest.kt:26) <28 internal calls>

The test file: https://gist.github.com/augustoerico/e88d3e5b59ae5d023d83c114b8ffa708 (I tried to copy-paste the source here. Failed miserably...)

Any insights on how I can make this work?

Thank you!

Answer 1

Ok, I've figured it out. It's actually a conceptual problem. The problem is that I'm trying to use the Firebase Android SDK to run a test outside of the Android context. I mean, my test is not an Android application, and I'm trying to use the Android SDK. All FirebaseApp.initializeApp() need a Context as a parameter.

So, what I have to do is to find a way to interact with my FirebaseDatabase. I think I can go with firebase-admin, or maybe use this one: https://github.com/bane73/firebase4j

Thank you for taking the time to help me (:

** Update **

I've opted to go with the Firebase REST API https://firebase.google.com/docs/reference/rest/database/

For future reference, I'm giving public full access, by tweaking the rules, so it is easier to write the tests setup and cleanup.

Answer 2

I've had the same problem and fixed it by initializing Firebase in the before step of my unit test:

FirebaseApp.initializeApp(InstrumentationRegistry.getInstrumentation().targetContext)