public void IsTopicUpdated()
{
validation.UpdateTopic(topicList[0]).Returns(topicListAdmin);
topicController.Request = new HttpRequestMessage();
topicController.Configuration = new HttpConfiguration();
topicList[0].TopicName = "UpdatedTopic";
var actionResult = topicController.PutTopic(topicList[0]);
Assert.AreEqual(HttpStatusCode.OK, actionResult.StatusCode);
}