test(ng-class): Make the ng-class tests compiler agnostic

A better place for this logic may be JQuery.
See #759

Author: jbdeboer

test/directive/ng_class_spec.dart

@@ -134,15 +134,17 @@ main() {
       _.rootScope.apply();
       _.rootScope.context['dynCls'] = 'foo';
       _.rootScope.apply();
-      expect(element.className).toEqual('ui-panel ui-selected foo');
+      // TODO(deboer): Abstract ng-binding
+      expect(element.className.replaceAll(' ng-binding', '')).toEqual('ui-panel ui-selected foo');
     });
 
 
     it('should not add duplicate classes', () {
       var element = _.compile('<div class="panel bar" ng-class="dynCls"></div>');
       _.rootScope.context['dynCls'] = 'panel';
       _.rootScope.apply();
-      expect(element.className).toEqual('panel bar');
+      // TODO(deboer): Abstract ng-binding
+      expect(element.className.replaceAll(' ng-binding', '')).toEqual('panel bar');
     });
 
 
@@ -152,7 +154,8 @@ main() {
       _.rootScope.apply();
       _.rootScope.context['dynCls'] = 'window';
       _.rootScope.apply();
-      expect(element.className).toEqual('bar window');
+      // TODO(deboer): Abstract ng-binding
+      expect(element.className.replaceAll(' ng-binding', '')).toEqual('bar window');
     });