指令Src代码：

.directive('ratingButton',['$rootScope',function($rootScope) {
      return {
          restrict: "E",replace: true,template: '<button type="button" class="btn btn-circle" ng-class="getRatingClass()"></button>',scope: {
              buttonRating: "="
          },link: function(scope,elem,attr) {
              scope.getRatingClass = function() {
                  if (!scope.buttonRating)
                      return '';
                  else if (scope.buttonRating.toUpperCase() === 'GREEN')
                      return 'btn-success';
                  else if (scope.buttonRating.toUpperCase() === 'YELLOW')
                      return 'btn-warning warning-text';
                  else if (scope.buttonRating.toUpperCase() === 'RED')
                      return 'btn-danger';
                  else if (scope.buttonRating.toUpperCase() === 'BLUE')
                      return 'btn-info';
              }
          }
      };
  }])

测试：

describe('Form Directive: ratingButton',function() {
 
    // load the controller's module
    beforeEach(module('dashboardApp'));
 
    var scope,element;
 
    // Initialize the controller and a mock scope
    beforeEach(inject(function($compile,$rootScope) {
        scope = $rootScope.$new();
 
        //set our view html.
        element = angular.element('<rating-button button-rating="green"></rating-button>');
        $compile(element)(scope);
        scope.$digest();
    }));
 
    it('should return appropriate class based on rating',function() {
        //console.log(element.isolateScope());
        expect(element.isolateScope().buttonRating).toBe('green');
        expect(element.isolateScope().getRatingClass()).toBe('btn-success');
 
    });
 
});

我在另一个指令单元测试中使用了类似的代码,通过元素属性传递值,并且按预期工作.对于这个测试buttonRating总是不确定不知道从哪里去(我是相当新的茉莉/羯磨)

任何帮助将是伟大的！