public void AddFeedback_SessionFound_AddsFeedbacktoSession()
        {
            var feedback = new FeedBackViewModel()
            {
                id = 1, Score = 4, Description = "testet"
            };

            _mockSessionRepository.Setup(s => s.GetById(feedback.id)).Returns(_dummyContext.Sessions.First(s => s.SessionId == feedback.id));
            var result = Assert.IsType <RedirectToActionResult>(_sessionController.AddFeedback(feedback));

            Assert.Equal("Details", result?.ActionName);
            Session session = _dummyContext.Sessions.First(s => s.SessionId == feedback.id);

            session.Feedback.Any(fb => fb.Description == feedback.Description && fb.Score == feedback.Score);
            _mockSessionRepository.Verify(m => m.SaveChanges(), Times.Once);
        }