Getting Unknown Provider error when injecting a Service into an Angular unit test

I just ran into this and solved it by switching to getting the service using the $injector explicitly:

var EventingService, $rootScope;
beforeEach(inject(function($injector) {
  EventingService = $injector.get('EventingService');
  $rootScope = $injector.get('$rootScope');
}));

I wish I could tell you why this works and why the simple

beforeEach(inject(function(EventingService) {   ....  }));

does not, but I don’t have the time to investigate the internals. Always best to use one coding style and stick to it.

This style is better in that the name of the variable that you use in your tests is the correct name of the Service. But it is a bit verbose.

There is another angular magic feature that uses strange variable names like $rootScope but I don’t like the hacky look of that.

Note that the most of the time people get this error because they didn’t include the modules:

beforeEach(module('capsuling'));
beforeEach(module('capsuling.capsules.services'));