Javascript Can'；t使用$httpBackend测试POST$http请求

试图通过单元测试覆盖我的应用程序的http请求。我使用Jasmine和Karma，并使用本教程逐步编写代码：$httpBackend。但我有一个错误：

Error: No pending request to flush !
        at Function.$httpBackend.flush (eval at <anonymous> (app/index.js:105:1), <anonymous>:1839:41)
        at Object.eval (eval at <anonymous> (app/index.js:137:1), <anonymous>:37:20)

来自控制器的代码块：

  $scope.status;
  $scope.isFetching = false;

  const handleResponse = response => {
    $scope.status = response.status;
    $scope.isFetching = false;
  };

  $scope.next = (email, password) => {
    $scope.isFetching = true;
    $http
      .post('http://localhost:5000/register', { email, password })
      .then(response => handleResponse(response))
      .catch(response => handleResponse(response));
  };

UPD

我还尝试在每个

$httpBackend.flush（）

之前添加以下内容（如下所示）：

---

但无论如何，没有任何变化。

在此处创建控制器后调用$httpBackend.flush（）

it('should successfully register user', () => {
  const controller = createController();
  $httpBackend.flush(); //<-- this is not necessary if controller creation doesn't involve $http calls
  $httpBackend.expectPOST('http://loalhost:5000/register').respond();
  $scope.next('hello@gmail.com', '123456');
  $httpBackend.flush();
});

---

哦，我的上帝。我花了大约两个小时来解决这个问题。非常感谢你！

if(!$rootScope.$$phase) {
    $rootScope.$apply();
}

it('should successfully register user', () => {
  const controller = createController();
  $httpBackend.flush(); //<-- this is not necessary if controller creation doesn't involve $http calls
  $httpBackend.expectPOST('http://loalhost:5000/register').respond();
  $scope.next('hello@gmail.com', '123456');
  $httpBackend.flush();
});

it('should successfully register user', () => {
  const controller = createController();
  $httpBackend.expectPOST('http://loalhost:5000/register').respond();
  $scope.next('hello@gmail.com', '123456');
  $httpBackend.flush();
});