injector already created. can not register a module

Question

I am a new bee to Angular JS and was trying to make something out of it in a proper TDD way, but while testing i am getting this error:

Injector alrea

Answer 1

Not sure that this is the cause, but your beforeEach should be like this:

beforeEach(function() {
  inject(function($injector) {
    authorService = $injector.get('authorService');
  }
});

Answer 2

You're using the inject function wrong. As the documentation states, the inject function already instantiates a new instance of $injector. My guess is that by passing $injector as a argument to the inject function you are asking it to instantiate the $injector service twice.

Just use inject to pass in the service you want to check. Underneath the covers, inject will use the $injector service it instantiates to grab services.

You can fix this problem by changing the second beforeEach statement to:

beforeEach(inject(function(_authorService_) {
    authorService = _authorService_;
}));

One other thing to note. The argument authorService passed to the inject function has been wrapped with '_' so it's name does not hide the variable created within the describe function. Thats also documented in the inject documentation.

Answer 3

If you are mixing calls to module('someApp') and inject($someDependency) you will get this error.

All your calls to module('someApp') must occur before your calls to inject($someDependency).