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");
}