Karma angularjs测试:超时中的测试代码从不执行。

Question

$timeout中的以下代码从未被调用。我可以在其中输入任何我喜欢的错误测试，并且测试总是通过(有一个类似的问题(Karma e2e testing: how to know when the DOM is ready?)，但它没有提供解决方案)：

it('should display a filter row when attribute sg-live-filtering is present', function()   
{
   angular.mock.inject(function($compile, $rootScope, $timeout) {
      var elem = $compile('<div sg-grid sg-data="api/grid/accounts" sg-live-filtering></div>')(scope); // the angular-kendo grid
      $rootScope.$apply();            
      var table = elem.find('table[role="grid"]'); // find the kendo grid
      expect(table.length).toBe(1);
      var header = table.find('thead'); // find the grid's table header 
      expect(header.length).toBe(1);
      $timeout(function () {
         // get the second row in the header and check it has a specific class
         expect(header.find('tr').eq(1).hasClass('sg-grid-filter-row')).toBeTruthy();
         // e.g. I could do this and it would still pass!!!             
         expect(header.find('tr').eq(500));
      });
   }
} 

PhantomJS 1.9.2 (Windows 7)：871 (跳过383)中的1成功(0秒/ 0 )

这就是浏览器中的样子：

​

​

kendo网格是使用标准angularjs指令创建的：

angular.module('sgComponents').directive('sgGrid', [
   templateUrl: 'sg-grid.html',
   // lots of kendo code follows to build the grid       
]);

外部sg-grid.html模板：

<div sg-grid sg-data="api/grid/accounts"             
     sg-live-filtering> <!-- the attribute I want to test -->        
</div>

当指令代码运行时，会进行检查，以查看sg-实时过滤攻击是否存在。如果是，则调用实用程序函数，将图像中突出显示的行附加到网格的表头中。

if (attrs.sgLiveFiltering) {
   /*
    timeout is needed to ensure DOM is ready. COULD THIS BE THE PROBLEM?
   */
   $timeout(function () { 
      /*
      this function adds the filter row to the grid. 
      THE NEW ROW HAS CLASS 'sg-grid-filter-row' THAT I USE FOR TESTING
      */
      buildGridFilterRow(elm, scope, attrs);
    });
}

Answer 1

你能显示你的测试代码吗？因为您必须等待以执行超时或只使用$timeout.flush()；下面是一个示例：Unit testing an asynchronous service in angularjs

Answer 2

终于(两周后！)把这个弄好了。@idursun和igorzg建议使用$timeout.flush(100)是正确的，但正如@idursun在他的评论中进一步提到的那样，它也需要删除$timeout块。

当我最初尝试这个时，它没有起作用，但现在起作用了。别问我为什么，我只关心它是否起作用！以下是我的完整测试用例供参考：

it('should display a filter row when attribute sg-live-filtering is present', function () {
   angular.mock.inject(function($compile, $rootScope, $timeout) {
   var scope = $rootScope.$new();
   scope.accountColumnsForAdvSearch = [
      {field: 'accountId', title: 'AccountId', dataType: 'string'},
      {field: 'name', title: 'Account Name', dataType: 'string'},
      {field: 'shortName', title: 'Short Name', dataType: 'string'},
      {field: 'status', title: 'Status', dataType: 'string'}
   ];

   $httpBackend.when('GET', 'api/grid/accounts').respond(accountData);    

   var elem = $compile('<div sg-grid sg-data="api/grid/accounts" sg-columns="accountColumnsForAdvSearch" sg-live-filtering="true"></div>')(scope);
   $rootScope.$apply();
   $httpBackend.flush();
   $timeout.flush(100); // wait for DOM to load
   var table = elem.find('table[role="grid"]'); // the kendo grid
   expect(table.length).toBe(1);
   var filterRow = table.find('.sg-grid-filter-row'); // the filter row
   expect(filterRow.length).toBe(1);
});