Angularjs 测试modalInstance.result.then

我终于开始学习如何使用我编写的旧angularjs应用程序进行测试。我的控制器中有一些modals，我一辈子都不知道如何确保运行“modalInstance.result.then”中的代码并对其进行测试

我搜索了谷歌等网站，找到了一些测试模态的例子，但到目前为止，他们似乎都在测试模态控制器本身

我如何得到承诺（modalInstance.result.then）来解决？我已尝试运行$modal.close（），但失败的原因是出现了错误。我试过用jasmine间谍软件等多种方式嘲笑modalInstance和$modal。我对测试的无知阻碍了我。任何帮助都将被告知

这是我的controller.js：

(function() {
    var comment = angular.module('APP.comment', ['APP.user']);

    var commentController = function($scope, $modal) {

        var self = this;

        self.addComment = function(newComment) {

        var modalInstance = $modal.open({
            templateUrl: 'views/commentModal.html',
            backdrop: 'static',
            windowClass: 'modal',
            controller: 'commentModalController',
            controllerAs: 'commentCtrl',
            resolve: {
                newComment: function() {
                    return newComment;
                }
            }
        });

        modalInstance.result.then(function(data) {
            // How do I test that the function or branches here
            // were run?
            if (data.length === 2) {
                // do this thing
            } else {
                // do this other thing
            }
        });
      };
    };

    commentController.$inject = ['$scope', '$modal'];
    comment.controller('commentController', commentController);
}());

以下是我迄今为止的测试：

describe('Unit: commentController', function() {

    var $rootScope,
        $scope,
        $controller,
        $modal;

    beforeEach(module('APP.comment'));

    beforeEach(inject(function(_$rootScope_, _$controller_, _$modal_) {

        $modal = _$modal_;

        $rootScope = _$rootScope_;
        $scope = $rootScope.$new();

        $controller = _$controller_('commentController as commentCtrl', {
            $scope: $scope,
            $modal: $modal,
        });

    }));

    it('should have controller defined', function() {
        expect($scope.qaCtrl).toBeDefined();
    });

    it('should have method defined', function() {
        expect($scope.qaCtrl.addComment).toBeDefined();
    });

    describe('$scope.commentCtrl.addComment', function() {
        it('should open modal', function() {
            $scope.commentCtrl.addComment();
        });
    });
});

我这里有一个plnkr：

it('should open modal', inject(function($q) {
  var fakeResult = {
    result: $q.when([])
  };
  spyOn($modal, 'open').and.returnValue(fakeResult);

  $scope.commentCtrl.addComment();

  $scope.$apply();

  // now check that the right thing has been done, given the empty array returned
}));