public void GetByAdId_ShouldReturnCorrectRating()
{
Guid guid = new Guid("ee4cd8a2-eb0e-453d-a3b5-081b9165942e");
var response = controller.GetByAdId(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.AdId == guid).Count(), rating.Count());
}