Inject a service into controller test

Inject a service into controller test.md

Given a controller that uses the $location service

'use strict';

/**
 * @ngdoc function
 * @name categoryManagerApp.controller:CategoryCtrl
 * @description
 * # CategoryCtrl
 * Controller of the categoryManagerApp
 */
angular.module('categoryManagerApp')
  .controller('CategoryCtrl', ['$scope', '$location', function ($scope, $location) {
    $scope.go = function ( path ) {
      $location.path( path );
    };
  }]);

Inject the service in 3 steps

'use strict';

describe('Controller: CategoryCtrl', function () {

  // load the controller's module
  beforeEach(module('categoryManagerApp'));

  var CategoryCtrl,
    scope,
    $location; // <-- Step 1 Instantiate the variable.

  // Initialize the controller and a mock scope
  beforeEach(inject(function ($controller, $rootScope, _$location_) {
    scope = $rootScope.$new();
    $location = _$location_; // <-- Step 2 Inject the service and set it to the variable.
    CategoryCtrl = $controller('CategoryCtrl', {
      $scope: scope,
      $location: $location // <-- Step 3 Set it in the mocked controller.
      // place here mocked dependencies
    });
  }));

  it('should attach a function called go to the scope', function () {
    var go = function ( path ) {
      $location.path( path );
    };
    expect(scope.go).toBeDefined();
    expect($location).toBeDefined();
    expect(typeof(scope.go)).toBe('function');
    expect(scope.go.toString() == go.toString()).toBe(true);
  });
});

1. Instantiate the $location variable.
2. Inject the _$location_ service and set it to the variable.
3. Set it in the mocked controller.