public void TestGetPostStatistics()
        {
            List <Post> posts = new List <Post>();

            posts.Add(post);
            mockPostService.Setup(x => x.GetAllPostStatistics(It.IsAny <StatisticsFilter>())).Returns(posts);
            var           _postController    = new PostController(mockPostService.Object);
            IActionResult getPostStatisticst = _postController.GetPostStatistics(statisticsFilter);
            var           type = getPostStatisticst.GetType();

            Assert.AreEqual(type.Name, "OkObjectResult");
        }