test(ngClass): add missing assertions

Author: RichardLitt

test/ng/directive/ngClassSpec.js

@@ -153,13 +153,15 @@ describe('ngClass', function() {
     element.addClass('foo');
     $rootScope.dynCls = '';
     $rootScope.$digest();
+    expect(element[0].className).toBe('ng-scope');
   }));
 
 
   it('should convert undefined and null values to an empty string', inject(function($rootScope, $compile) {
     element = $compile('<div ng-class="dynCls"></div>')($rootScope);
     $rootScope.dynCls = [undefined, null];
     $rootScope.$digest();
+    expect(element[0].className).toBe('ng-scope');
   }));