Firebase: firebase app named '[default]' already exists (app/duplicate-app).

Question

Problem :

Currently I am trying to unit test while developing the simple web with AngularJS + Firebase, but I have the problem defining my spec and trying a test runner

My Error:

PhantomJS 2.1.1 (Mac OS X 0.0.0) Controller: MainCtrl should.... FAILED
Error: [$injector:modulerr] Failed to instantiate module MainApp due 
to: Firebase: Firebase App named '[DEFAULT]' already exists 
(app/duplicateapp).

But, defining my spec once is not the problem. For example:

it('should....',function(){
   expect(true).toBe(true)
})

But now I am unable to know why this error is occurring.  Please let me know how to fix the above error in short time?

Answer 1

I had the same issue in the recent past using firebase, and I discovered that I was initializing my firebase twice, example:

function initializeFirebase(){    
 var config = {
    apiKey: "myApiKey",
    authDomain: "myAuthDomain",
    databaseURL: "myDatabaseUrl",
    storageBucket: "myStorageBocket",
    messagingSenderId: "idhere"   
   };   
   //initialize firebase  
   firebase.initializeApp(config);  
}

In my case I was using the react, And I was calling a initializeFirebase() from two different components, but I have decided to call it only from the parent component. And now I am able to query the database, insert records, remove, can do all the operations on my database..

Hope this helps you in fixing your error.