测试$broadcast事件

Question

我对角度测试有问题。我正在试着测试$broadcast是否被成功解雇了。我有一些奇怪的行为试图使用spyOn。如果你有什么建议，请帮我解决这个问题已经好几个小时了。我的测试看起来如下：

describe('Signup controller', function() {

  beforeEach(module('myApp'));

  describe('SignupCtrl', function(){
    var $scope, ctrl, $httpBackend, AUTH_EVENTS, $rootScope;

    beforeEach(inject(function($injector, $controller,
      _$httpBackend_, _apiUrl_, _AUTH_EVENTS_){

        $rootScope = $injector.get('$rootScope');
        $scope = $rootScope.$new();
        ctrl = $controller('SignupCtrl', {$scope: $scope});
        $httpBackend = _$httpBackend_;
        apiUrl = _apiUrl_;
        AUTH_EVENTS = _AUTH_EVENTS_;
        spyOn($rootScope, "$broadcast");
      }
    ));

    afterEach(function() {
      $httpBackend.verifyNoOutstandingExpectation();
      $httpBackend.verifyNoOutstandingRequest();
    });

    it('should show error message from API', function() {
      var apiMessage = 'That email already exists.';
      $httpBackend.expectPOST('/users').respond(400, {
        message: apiMessage
      });

      // call controller register function with mock empty credentials
      $scope.register({});

      $httpBackend.flush();
      expect($rootScope.$broadcast).toHaveBeenCalledWith(AUTH_EVENTS.signupFailed);
      expect($scope.errorMessage).toBe(apiMessage);
      expect($scope.showErrorMessage).toBe(true);
    });

  });
});

我所犯的错误是：

TypeError: 'undefined' is not an object (evaluating '$rootScope.$broadcast('$locationChangeStart', $location.absUrl(), oldUrl).
            defaultPrevented')
  at /src/web/src/vendor-bower/angular/angular.js:9789
  at /src/web/src/vendor-bower/angular/angular.js:12595
  at /src/web/src/vendor-bower/angular/angular.js:12407
  at /src/web/src/vendor-bower/angular-mocks/angular-mocks.js:1438

Answer 1

试试spyOn(rootScope,'$broadcast').andCallThrough();，让我知道它是如何进行的。也请看我的评论。