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：
@H_301_32@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.
@H_301_32@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 $apply has.
$rootScope.$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
