Unit testing AngularJS factories that have dependencies

manpreet Best Answer 2 years ago

When unit testing an Angular factory (with Karma + Jasmine), how do I inject a stub dependency into the factory under test?

Here's my factory:

mod = angular.module('myFactoryMod', []);

mod.factory('myFactory', [
  '$log', 'oneOfMyOtherServices', function($log, svc) {
    return makeSomethingThatDoesSomethingWithTheseDependencies($log, svc);
  }
]);

oneOfMyOtherServices is needed when instantiating my factory.

Here's my test:

it('can get an instance of my factory', function() {
  var oneOfMyOtherServicesStub;

  angular.mock.module('myFactoryMod');

  oneOfMyOtherServicesStub = {
    someVariable: 1
  };

  //****How do I get my stub in my target? ****

  angular.mock.inject(['myFactory', function(target) {

      expect(target).toBeDefined();

    }
  ]);
})

N.B. I know that $controller allows this for controllers, but I don't see an equivalent for factories.

manpreet 2 years ago

describe('myFactory', function () {
  // Load your module.
  beforeEach(module('myFactoryMod'));

  // Setup the mock service in an anonymous module.
  beforeEach(module(function ($provide) {
    $provide.value('oneOfMyOtherServicesStub', {
        someVariable: 1
    });
  }));

  it('can get an instance of my factory', inject(function(myFactory) {
    expect(myFactory).toBeDefined();
  }));
});