public void PostTest()
        {
            //Arrange
            RatingsController controller = MockControllerCtor();

            var input = new UserRatingsModel
            {
                Comments = "Comment1",
                Rating   = 7,
                Username = "******"
            };

            // Act
            Task <IHttpActionResult> result = controller.Post(42, input);

            //    // Assert
            Assert.IsNotNull(result.Result);
            Assert.AreEqual(2, ((System.Web.Http.Results.OkNegotiatedContentResult <Data.Entities.RatingsEntity>)result.Result).Content.Id);
            Assert.AreEqual(42, ((System.Web.Http.Results.OkNegotiatedContentResult <Data.Entities.RatingsEntity>)result.Result).Content.BeerId);
        }