摩卡/角度单元测试永远不会运行“然后”功能

我正在尝试测试可在摩卡咖啡中返回promise的角度服务，但是在单元测试中调用“ then”会超时。我的服务依赖于带有异步$ resource请求的第二个服务。myService.getData（）应该从内部从所述异步服务获取数据，并将承诺传递给控制器​​，该控制器在响应上调用“ then”函数。这在控制器中效果很好，并且在单元测试中绝对失败。

服务代码：

// use: myService.getData.then(...) works beautifully in angular controllers
getData = function(dataId) {
    var dataPromise;

    // get students from the api, if necessary, or from the service if already retrieved
    // dataList is a private property of the service
    if(!dataList) {
        dataPromise = asyncServiceUsedByMyService.asyncMethod({...}).$promise
            .then(
                function(response){


                  dataList = response;

                  doSomeDataManipulation();

                      return dataList;
                },
                function(err) {
                    return err;
                }
            );
    }
    // use the existing studentList if available
    else {
        dataPromise = $q.when(function(){
            return dataList
        });
    }

    return dataPromise;
};

测试代码

describe('Service Test', function() {
    var expect = chai.expect,
        myService,
        asyncServiceUsedByMyService;


    beforeEach(function() {

        var data,
            asyncServiceMock;

        data =[...];

        // mock the async dependency
        asyncServiceMock = {
            asynchMethod: function () {
                var deferred = q.defer();

                deferred.resolve(data);
                return {$promise: deferred.promise};
            }
        };

        module('myApp');

        module(function($provide){
            $provide.value('asyncServiceUsedByMyService', asyncServiceMock);
        });

        inject(function(myService, $q, asyncServiceUsedByMyService) {
            myService = myService;
            q = $q;
            courseEnrollmentService = courseEnrollmentServiceMock;
        });
    });

    // passes
    it('should be available', function() {
        expect(!!myService).to.equal(true);
    });

    // 'then' function is never called, unit test times out
    it('should get all items from async dependency', function(done) {
        myService.getData().then(function(response) {
            expect(response).to.have.property('length').that.equals(5);
            done();
        });
    });

});

我如何获取myService的“ then”功能以在单元测试中运行，因此它将获取模拟的数据（由于我们没有进行实际的api调用，该数据应该几乎是瞬时的？）。

注意：我也尝试了'chai-as-promised'语法，但是以下内容似乎超时了

it('should get all items from async dependency', function(done) {
    expect(myService.getData()).to.eventually.have.property('length').that.equals(5).and.notify(done);
});