angularjs - AngularJS 上的单元测试 $scope.$

Question

大家好，我正在努力测试 $.on 函数，我正在寻找对此的任何建议或帮助:

Controller

  $scope.$on("sampleFilesSelected", function(event, args) {
                $scope.sampleFiles = args.newSampleFiles;
            }); 

规范

describe('Testing a $.on', function() {
  var $scope = null;
  var ctrl = null;


  beforeEach(module('test'));

  it('should invoke myEvent when "myEvent" broadcasted', inject(function($rootScope, $controller) {
    $scope = $rootScope.$new();

    ctrl = $controller('MainCtrl', {
      $scope: $scope
    });

    $scope.$broadcast('myEvent');
    expect($scope.sampleFilesSelected).toBe(true);
  }));
});

错误

TypeError: Unable to get property 'newSampleFiles' of undefined or null reference
        undefined

Answer 1

您应该向您的事件传递一个值，在断言之前调用 $digest :

$scope.$broadcast('myEvent', { 'newSampleFiles' : true } );
$scope.$digest();
expect($scope.sampleFilesSelected).toBe(true);