public void GetByUserId_ShouldReturnCorrectRating()
        {
            Guid guid     = new Guid("93297545-6aff-44cf-911c-fc4b5a88b404");
            var  response = controller.GetByUserId(guid);

            Assert.IsNotNull(response);
            Assert.AreEqual(HttpStatusCode.OK, response.StatusCode);
            var rating = response.Content.ReadAsAsync <IEnumerable <Rating> >().Result;

            Assert.AreEqual(ratings.Where(c => c.Value.UserId == guid).Count(), rating.Count());
        }