public function testTextAreaResolveValueAndSetToModelUpdateAsNull()
 {
     $form = new TextAreaWorkflowActionAttributeForm('WorkflowsTestModule', 'WorkflowModelTestItem');
     $form->type = TextAreaWorkflowActionAttributeForm::TYPE_STATIC_NULL;
     $model = new WorkflowModelTestItem();
     $model->textArea = 'abc';
     $adapter = new WorkflowActionProcessingModelAdapter($model, Yii::app()->user->userModel);
     $form->resolveValueAndSetToModel($adapter, 'textArea');
     $this->assertNull($model->textArea);
 }