angularjs - $httpBackend ExpectGET 未返回预期数据

Question

我首先要说的是，$httpBackend 和spyOn 对我来说相当陌生，我正在努力弄清楚正在发生的事情。基本上，我尝试执行 $httpBackend.expectGET('/myroute/').respond(...) 然后使用 spyOn，但我不断得到

Expected [  ] to equal Object({ success: true, message: 'Yeah!' })

这是我要测试的代码:

angular.module('TestModule')
       .service('TestService',TestService);

TestService.$inject = ['$http'];
function TestService($http){
    var service = {};
    service.DoIt = DoIt;
    return service;

    function DoIt() {
        return $http.get('/myroute/')
            .then(handleSuccess,handleError('Error happened!'));
    }

    function handleSuccess(res) {
        return res.data;
    }

    function handleError(error) {
        return function(){
            return {success: false, message: error}
        };
    }
}

这是我的 Karma-Jasmine 测试:

describe('Test Module',function(){
    beforeEach(module('TestModule'));

    describe('TestService Tests',function(){
        var service,$httpBackend;
        beforeEach(inject([
             '$injector',
             function($injector){
                 $httpBackend = $injector.get('$httpBackend');
                 service = $injector.get('TestService');
             }
        ]));

        afterEach(function(){
            $httpBackend.verifyNoOutstandingExpectation();
            $httpBackend.verifyNoOutstandingRequest();
        });

        it('should DoIt',function(){
            var mockResponse = {
                data : {success:true, message:"Yeah!"}
            };

            $httpBackend.expectGET('/myroute')
                        .respond(Promise.resolve(mockResponse));

            spyOn(service,'DoIt').and.callThrough();

            service.DoIt().then(function(data){
                expect(service.DoIt).toHaveBeenCalled();
                expect(data).toEqual(mockResponse.data); <-- ERROR OCCURS HERE -->
            });

            $httpBackend.flush();
        });

    });
});

更多信息:

使用我在这里找到的示例:http://www.bradoncode.com/blog/2015/06/26/unit-testing-http-ngmock-fundamentals/ ，我在我的测试代码中尝试了这个:

it('should DoIt',inject(function($http){
    var promise = $http.get('/myroute').then(handleSuccess,handleError('bad stuff happened'));
    promise.then(function(data){
        console.log('Data: ' + JSON.stringify(data,null,3));
    });

    $httpBackend.expect('GET','/myroute').respond(200,{data:'Yeah!'});
    $httpBackend.flush();
}));

function handleSuccess(response) {return response.data;}
function handleError(error){
    return function(){
        return {success:false,message:error};
    };
}

这给了我期望的响应:'Data: {"data": "yeah"}'

我更新的问题:我认为 service.DoIt() 正在做与 promise 相同的事情。这里发生了什么？我没有注入(inject)我的服务吗？我不明白 Karma 希望我如何进行此测试。如有任何帮助，请!

Answer 1

如果我正确理解您的测试意图，我相信这就是您所需要的:

describe('Test Module', function() {

    var $httpBackend, service;

    beforeEach(module('TestService'));

    beforeEach(inject(function(_$httpBackend_, _TestService_) {
        $httpBackend = _$httpBackend_;
        service = _TestService_;
    }));

    afterEach(function() {
        $httpBackend.verifyNoOutstandingExpectation();
        $httpBackend.verifyNoOutstandingRequest();
    });

    it('should DoIt', function() {
        var mockResponse = {
            data: { success: true, message: "Yeah!" }
        };

        $httpBackend.expectGET('/myroute/')
            .respond(mockResponse);

        service.DoIt().then(function(data) {
            expect(data).toEqual(mockResponse);
        });

        $httpBackend.flush();
    });

});