Fix the match tests

tests/js/directives-test.coffee

@@ -169,25 +169,25 @@ describe 'h.directives', ->
 
   describe '.match', ->
     $element = null
+    $isolateScope = null
 
     beforeEach ->
       $scope.model = {a: 1, b: 1}
 
       $element = $compile('<input name="confirmation" ng-model="model.b" match="model.a" />')($scope)
+      $isolateScope = $element.isolateScope()
       $scope.$digest()
 
     it 'is valid if both properties have the same value', ->
       controller = $element.controller('ngModel')
       assert.isFalse(controller.$error.match)
 
-    # TODO: Work out how to watch for changes to the model.
-    it 'is invalid if the local property differs'
-    # it 'is invalid if the local property differs', ->
-    #   $scope.model.b = 2
-    #   $scope.$digest()
+    it 'is invalid if the local property differs', ->
+      $isolateScope.match = 2
+      $isolateScope.$digest()
 
-    #   controller = $element.controller('ngModel')
-    #   assert.isTrue(controller.$error.match)
+      controller = $element.controller('ngModel')
+      assert.isTrue(controller.$error.match)
 
     it 'is invalid if the matched property differs', ->
       $scope.model.a = 2
@@ -198,6 +198,7 @@ describe 'h.directives', ->
 
     it 'is invalid if the input itself is changed', ->
       $element.val('2').trigger('input').keyup()
+      $scope.$digest()
 
       controller = $element.controller('ngModel')
       assert.isTrue(controller.$error.match)