Question

我们有测试套件，如：

describe('Basic Test Suite', function(){
    var DataService, httpBackend;

    beforeEach(module('iorder'));
    beforeEach(inject(
        function (_DataService_, $httpBackend) {
            DataService = _DataService_;
            httpBackend = $httpBackend;
        }
    ));
    //And following test method:
    it('should call data url ', function () {
        var promise = DataService.getMyData();
        promise.then(function(result) { 
            console.log(result, promise); // Don't gets here
        }).finally(function (res) {  
            console.log(res); // And this is also missed
        })
    })
});

如何让jasmine + karma与angular服务一起工作，返回promise？

我见过this question，但看起来就是在测试用例中使用promises。不是测试承诺。

Answer 1

你需要告诉jasmine您的测试是异步的，以便等待承诺解决。您可以通过在测试中添加done参数来执行此操作：

describe('Basic Test Suite', function(){
    var DataService, httpBackend;

    beforeEach(module('iorder'));
    beforeEach(inject(
        function (_DataService_, $httpBackend) {
            DataService = _DataService_;
            httpBackend = $httpBackend;
        }
    ));
    //And following test method:
    it('should call data url ', function (done) {
        var promise = DataService.getMyData();
        promise.then(function(result) { 
            console.log(result, promise); // Don't gets here
            done();//this is me telling jasmine that the test is ended
        }).finally(function (res) {  
            console.log(res); // And this is also missed
            //since done is only called in the `then` portion, the test will timeout if there was an error that by-passes the `then`
        });
    })
});

通过向测试方法添加done，您可以让jasmine知道它是异步测试，它会等到调用done或超时。我通常只是在done中调用then，并依靠超时来测试失败。或者，我相信您可以使用某种错误对象调用done，这也会导致测试失败，因此您可以在catch中调用它。

茉莉花。角度服务。角度承诺。如何让他们一起玩？

1 个答案: