public void CachesAndAnswersCanBeSavedToTheDatabase()
        {
            var cache = new Cache
            {
                Answers = new List <Answer> {
                    sampleAnswer, anotherAnswer
                }
            };

            repo.Save(cache);
            repo.Commit();
            var assertCache = assertContext.Caches.Include(x => x.Answers).First(x => x.Id == cache.Id);

            Assert.NotNull(assertCache.Id);
            Assert.Equal(2, assertCache.Answers.Count);
            var first  = assertCache.Answers.First(x => x.Id == sampleAnswer.Id);
            var second = assertCache.Answers.First(x => x.Id == anotherAnswer.Id);

            AssertAnswer(sampleAnswer, first);
            AssertAnswer(anotherAnswer, second);
        }