public void TestDeleteTopics()
{
List <string> listTopicId = new List <string>();
listTopicId.Add("da8f7af6sffa5af67asf7");
listTopicId.Add("da8f7af6sffa5af67asf3");
mockTopicService.Setup(x => x.DeleteMany(listTopicId)).Returns(true);
var topicController = new TopicController(mockTopicService.Object);
IActionResult isDelete = topicController.DeleteTopics(listTopicId);
var type = isDelete.GetType();
Assert.AreEqual(type.Name, "OkObjectResult");
}