Jasmine单元测试AngularJS工厂有两个依赖项($ http和另一个工厂返回promise)

Question

我正在使用Ionic框架进行自定义应用程序.在这个过程中,我正在尝试为datastoreServices依赖于DomainService和的工厂编写单元测试$http.我对Jasmine Unit测试的实现感到困惑.

我的工厂如下.

app.factory("datastoreServices", ["$http", function($http) {
    return {
        getData: function(data, DomainService) {
            return $http.post(DomainService.host + 'factor', data);
        }
    };
}]);

app.factory('DomainService', function() { //here
    if (ionic.Platform.isAndroid()) {
        return {
            host: 'http://10.0.2.2:7001/'
        }
    }
    return {
        host: 'http://localhost:7001/'
    }
})

我的单元测试骨架如下.它有两个依赖关系,因此无法弄清楚如何继续.这是我到目前为止在单元测试文件中得到的.

describe(
        'datastoreServices',
        function() {
            beforeEach(module('Myapp'));
            describe('getData'),
                function() {
                    it("Should return correct values", inject(function(datastoreServices, DomainService, $httpBackend) {
                            expect(datastoreServices.getData(httpBackend.. /***something here!**/ )
                                .toEqual("2.2");
                            }))
                    }

我对嘲笑和东西知之甚少.有人可以帮我测试那家工厂吗datastoreServices？以下内容需要测试:

• Http发帖是否正确？
• 该函数是否返回正确的承诺？

这是plnkr中app的类似场景.

Idk,如果我问得太多了.提前致谢.

Answer 1

主要原则是：

• $http 在测试期间被模拟，这意味着您的服务器在测试执行期间并未被实际调用
• 您必须使用 $httpBackend 来断言 http 调用和模拟服务器响应https://docs.angularjs.org/api/ngMock/service/ $httpBackend
• 您可以轻松注入或模拟测试所需的任何依赖项

这是一个基于您的操作代码的示例：

    describe('datastoreServices', function() {

    beforeEach(module('MyApp'));

    // get a reference to the $httpBackend mock and to the service to test, and create a mock for DomainService
    var $httpBackend, datastoreServices, DomainService;
    beforeEach(inject(function(_$httpBackend_, _datastoreServices_) {
        $httpBackend = _$httpBackend_;
        datastoreServices = _datastoreServices_;
        DomainService = function() {
            return {
                host: 'http://localhost:7001/'
            };
        };
    }));

    // after each test, this ensure that every expected http calls have been realized and only them
    afterEach(function() {
        $httpBackend.verifyNoOutstandingExpectation();
        $httpBackend.verifyNoOutstandingRequest();
    });


    it('calls http backend to get data', function() {
        var data = {foo: 'bar'};

        // write $http expectation and specify a mocked server response for the request
        // see https://docs.angularjs.org/api/ngMock/service/$httpBackend
        $httpBackend.expectPOST('http://localhost:7001/factor', data).respond(201, {bar: 'foo'});

        var returnedData;
        datastoreServices.getData(data, DomainService).success(function(result) {
            // check that returned result contains
            returnedData = result;
            expect(returnedData).toEqual({bar: 'foo'});
        });

        // simulate server response
        $httpBackend.flush();

        // check that success handler has been called
        expect(returnedData).toBeDefined();
    });
});