- svc.test = function(foo){
- if (!foo){
- // return Promise.reject(new Error('foo is required'));
- return $q.reject(new Error('foo is required'));
- } else {
- // get data via ajax here
- return $q.resolve({});
- }
- };
- it.only('should error on no foo',function(){
- var resolvedValue = MyServices.test();
- $rootScope.$apply();
- return resolvedValue.should.eventually.be.rejectedWith(TypeError,'foo is required');
- });
单元测试只是超时了.我不确定我在这里做错了什么来得到正确解决的承诺.使用$q似乎是一个问题 – 当我使用本机Promise.reject()时,它工作正常.
我在这里提交了一张票,但似乎没有人回应：
https://github.com/domenic/chai-as-promised/issues/150
- it('does not work',() => {
- $timeout.flush();
- expect(myAsyncTask()).to.eventually.become('foo');
- })
- it('does work',() => {
- expect(myAsyncTask()).to.eventually.become('foo');
- $timeout.flush();
- })
在刷新异步任务队列之前,需要启动对异步任务的调用.
另外,不要使用$rootScope.$digest.这可能会产生其他副作用,这些副作用在您的测试中是不可取的.
$timeout.flush是你正在寻找的.
https://docs.angularjs.org/api/ngMock/service/ $超时
让您的特定测试工作：
- it('should error on no foo',function(){
- MyServices.test().should.eventually.be.rejectedWith(TypeError,'foo is required')
- $rootScope.$apply();
- });
- it('should pass on foo',function(){
- MyServices.test('foo').should.eventually.become({});
- $rootScope.$apply();
- }
TL;博士
- it('async test',() => {
- setup();
- expect();
- execute();
- })
- it('sync test',() => {
- setup();
- execute();
- expect();
- })
鉴于发表的评论：
Should it be mentioned that it is unethical to downvote ‘rival’ answers on the question you’re answering?
很公平.我认为答案是误导性的,因为没有必要进行额外的设置以使得使用Angular的承诺可以在不必处理完成的回调的情况下使用它. Fwiw,我会继续尝试撤销所说的downvote,并对此有道德.
The OP has no signs of timeout in his code and doesn’t state that the task is asynchronous.
$rootScope.$digest()has no side effects in specs when called outside of scope digest. The reason why it is not recommended in production is because it doesn’t have the safeguards that$applyhas.
$rootScope.$digest实际上与$rootScope相同.$apply(和$scope.$适用于此事). source
$timeout.flush也将刷新非基于$timeout的函数.它不是基于$timeout的功能所独有的.
Plunker展示它如何工作™：
plunker
