public void TestInsertOrUpdate()
{
mockTopicService.Setup(x => x.InsertOrUpdate(It.IsAny <Topic>())).Returns(topic);
var topicController = new TopicController(mockTopicService.Object);
IActionResult isDelete = topicController.InsertOrUpdate(topic);
var type = isDelete.GetType();
Assert.AreEqual(type.Name, "OkObjectResult");
}