fix(ngModel): render immediately also with async validators

Author: tbosch

src/ng/directive/input.js

@@ -2152,12 +2152,11 @@ var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$
       while(idx--) {
         viewValue = formatters[idx](viewValue);
       }
-      var lastViewValue = ctrl.$viewValue;
-      if (lastViewValue !== viewValue) {
-        ctrl.$$runValidators(undefined, modelValue, viewValue, function() {
-          ctrl.$viewValue = ctrl.$$lastCommittedViewValue = viewValue;
-          ctrl.$render();
-        });
+      if (ctrl.$viewValue !== viewValue) {
+        ctrl.$viewValue = ctrl.$$lastCommittedViewValue = viewValue;
+        ctrl.$render();
+
+        ctrl.$$runValidators(undefined, modelValue, viewValue, noop);
       }
     }
 

test/ng/directive/inputSpec.js

@@ -407,6 +407,31 @@ describe('NgModelController', function() {
       scope.$apply('value = 5');
       expect(ctrl.$render).toHaveBeenCalledOnce();
     });
+
+    it('should render immediately even if there are async validators', inject(function($q) {
+      spyOn(ctrl, '$render');
+      ctrl.$asyncValidators.someValidator = function() {
+        return $q.defer().promise;
+      };
+
+      scope.$apply('value = 5');
+      expect(ctrl.$viewValue).toBe(5);
+      expect(ctrl.$render).toHaveBeenCalledOnce();
+    }));
+
+    it('should not rerender nor validate in case view value is not changed', function() {
+      ctrl.$formatters.push(function(value) {
+        return 'nochange';
+      });
+
+      spyOn(ctrl, '$render');
+      ctrl.$validators.spyValidator = jasmine.createSpy('spyValidator');
+      scope.$apply('value = "first"');
+      scope.$apply('value = "second"');
+      expect(ctrl.$validators.spyValidator).toHaveBeenCalledOnce();
+      expect(ctrl.$render).toHaveBeenCalledOnce();
+    });
+
   });
 
   describe('validations pipeline', function() {