AngularJS $ q.defer（）with jasmine done（）：promise.then函數沒有被調用

Question

有人可以幫我理解爲什麼這不起作用嗎？我正在使用Jasmine的both函數來等待promise.then函數也被調用併發出一個斷言。但它在被調用之前超時。

describe('greeting', function(){ 
    var greeting = 'hello'; 

    it('should call promise.then', function(done) { 
     inject(function ($q) { 
      var deferred = $q.defer(); 
      deferred.resolve(greeting); 

      deferred.promise.then(function (greeting) { 
       expect(greeting).toEqual('hello'); 
       done(); 
      }); 

     }); 
    }); 
}); 

的then功能不被調用和Jasmine超時此消息：

Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL. 

Answer 1

確保你做一個$scope.$apply觸發角消化週期，就像這樣：

inject(function ($q, $rootScope) { 
    var deferred = $q.defer(); 
    deferred.resolve(greeting); 

    deferred.promise.then(function (greeting) { 
     expect(greeting).toEqual('hello'); 
     done(); 
    }); 
    $rootScope.$apply(); 
}); 

應該解決問題