如何为 angularJS 中的 $http.get 编写 karma-jasmine 测试用例？

Question

我有一个服务：

(function () {
    angular.module('app').service('MyAppService', MyAppService);
    MyAppService.$inject = ['$http', 'testUrl'];
    function MyAppService($http, testUrl) {
        var service = {
            testFunction: testFunction        
        };
        return service;
        function testFunction() {
            /*testurl is my backend API*/
            return $http.get(testUrl)                
                .error(function(){
                    return;
                })
                .then(function (response) {
                    return response.data;
                });
        }
    }
})();

我在控制器中将其称为：

        testControllerFunction();
        function testControllerFunction() {
             MyAppService.testFunction().then(function (response) {
                app.testResponse = response;  //This my http response
                console.log(app.testResponse);
            });
        }

我正在为 MyAppService 中成功的 $http.get 请求编写一个 karma 测试用例：

describe('MyAppService', function () {
        var MyAppService,http;
        beforeEach(function() {
            module('app');
            inject(function ($injector) {
                MyAppService = $injector.get('MyAppService');
                testUrl = $injector.get('testUrl');
                http = $injector.get('$httpBackend');
            });
        });

        it('should call the backend testurl ', function () {
            MyAppService.testFunction();
            http.expectGET(testUrl);
        });
    });

但这似乎不起作用？我哪里做错了？ 谢谢！

Answer 1

你必须 flush $httpBackend

    it('should call the backend testurl ', function () {
        http.expectGET(testUrl);            
        MyAppService.testFunction();
        http.flush();           
    });