AngularJS 测试：模拟 $httpBackend - 处理成功和错误方法答案

【问题标题】：AngularJS testing: Mocking $httpBackend - Handling Success and Error MethodsAngularJS 测试：模拟 $httpBackend - 处理成功和错误方法
【发布时间】：2014-09-01 13:20:15
【问题描述】：

更新：我设法通过更新进一步缩小了问题范围并修复了 Unexpected request 错误httpBackend.when 请求包含一些无效的 ascii 字符。

我在当前代码块中附加了Plunker。

但是我在有效测试成功和错误方法操作的触发方面仍然存在困难。我还需要添加期望来检查消息广播。

为了测试上述场景，我设计了一个包含在 Plunker 中的 hack，但我相信应该有更好的方法来测试这些场景。

任何有关我如何克服此问题并测试响应消息状态的线索将不胜感激。

问题

我已经为我的测试设置了 $httpBackend 的预期值/响应，但是当我运行 $httpBackend.flush() 时，它失败并指示以下提到的错误。

提示错误信息

Error: Unexpected request: GET https://192.168.1.10:3334/res?t1=CHECK&t2='?'&req={"_msgType":"Login_msg","UserName":"e@e.com","Password":"123"}

我确实找到了一些讨论此问题域的有用链接，它们确实帮助我缩小了问题范围。但是我似乎仍然无法弄清楚这个单元测试失败的具体原因。

有用的堆栈溢出问题

有用的外部资源

我还尝试了moving the flush() call around 并尝试了calling $apply or $digest，当按照此处的建议在测试中触发 $http 请求时。

AngularJS 服务待测试

    app.service('restService',['$log','$http','$rootScope',function($log,$http,$rootScope)
{
    this.location = null;
    this.port = null;

    this.sendRequest = function(host,port,param1,param2,requestMsg)
    {
        this.location = host;
        this.port = port;
        $http.get('https://'+host+":"+port+"/res?t1="+param1+"&t2="+param2+"&req="+JSON.stringify(requestMsg)).
        success(function(data) { 
           //Need to add expectations to check success operations
           $log.log('response received',data);
           var msgData  = data;
           $rootScope.successCalled = true;
           $rootScope.response = data;
            if(msgData.hasOwnProperty('_msgType'))
            {
                $log.log('broadcast for channel',msgData._msgType);
                $rootScope.$broadcast(msgData._msgType,msgData);
            }
        }).
        error(function(){
            //Need to add expectations to check error method operations
            var httpErrMsg = {_msgType:'HTTPErr', host:host, port:port, t1:param1, t2:param2, requestMsg:requestMsg};
            $rootScope.errorCalled = true;
            $rootScope.response = data;
            $rootScope.$broadcast(httpErrMsg._msgType,httpErrMsg);
        });
    }

    this.getIP = function()
    {
        return this.location;
    }
    this.getPort = function()
    {
        return this.port;
    }
}])

用于测试服务的规范

     "use strict";                                   

    describe("Rest service test", function() 
    {
        var $scope, $location, httpBackend, $log, restService , loginMsg ;

        beforeEach(module('app'));

    beforeEach(inject(function (_restService_) 
    {
    restService = _restService_;
    }));

    beforeEach(inject(function($rootScope, _$location_, $httpBackend, _$log_)
    {
        $scope    =  $rootScope.$new();
        $location = _$location_;
        httpBackend = $httpBackend;
        $log = _$log_;

        loginMsg={ _msgType:"Login_msg", UserName:"e@e.com", Password:"123"};
    }));

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

    describe("Service : Rest Service", function()
    {
      it('Should start with location and port undefined', function() {
      expect(restService.location).toEqual(null);
      expect(restService.port).toEqual(null);
      });

      it("check if method exists", function() {
      expect(restService.sendRequest).toBeDefined();
      });

      it("GetIP method Exists ", function()
      {
       expect(restService.getIP).toBeDefined();
      });

      it("GetPort method Exists ", function()
      {
      expect(restService.getPort).toBeDefined();
      });

      it("GetIP  Value ", function()
      {
      restService.location = '192.168.1.10';
      expect(restService.location).toEqual('192.168.1.10');
      });

      it("GetPort Value ", function()
      {
      restService.port = '3334';
      expect(restService.port).toEqual('3334');
      });

      it("Execute sendRequest()", function() {
      httpBackend.when('GET', 'https://192.168.1.10:3334/res?t1=CHECK&t2=\'?\'&req={"_msgType":"Login_msg","UserName":"e@e.com","Password":"123"}')
      .respond ({SessionId:"2103337586",Status:"user e@e.com not found ",EMail:"e@e.com",rejectCode:1,rejectReason:"Invalid username or password",_msgType:"LoginReply_msg"});
      restService.sendRequest("192.168.1.10","3334","CHECK","'?'",loginMsg);
      httpBackend.flush();

      expect(restService.location).toEqual('192.168.1.10');
      expect(restService.port).toEqual('3334');
      expect($scope.successCalled).toBe(true);
      expect($scope.response).not.toBe(null);
      expect($scope.response._msgType).toEqual('LoginReply_msg');
      });
   });
});

【问题讨论】：

标签： angularjs unit-testing angularjs-service karma-jasmine httpbackend

【解决方案1】：

我知道，这个问题很老，但也许有人正在寻找，这可能会有所帮助。

像这样修改你的 beforeEach 函数：

beforeEach(inject(function($rootScope, _$location_, $httpBackend, _$log_)
{
    $scope    =  $rootScope.$new();
    $location = _$location_;
    httpBackend = $httpBackend;
    $log = _$log_;

    loginMsg={ _msgType:"Login_msg", UserName:"e@e.com", Password:"123"};

    httpBackend.expectGET(/192.168.1.10:3334/i).respond(function (){
        return [/*mockResponse*/];
    });
}));

这将解决此错误。

【讨论】：