public async Task CreateUserShouldSuccess() { User user = new User { UserId = "*****@*****.**", FirstName = "sam", LastName = "dsouza", Notes = new List <Note> { new Note { Id = 1, Title = "Demo", Content = "NoSQL Document DB", CreationDate = DateTime.Now } } }; await noteRepository.AddUser(user); var result = noteRepository.GetUser("*****@*****.**"); Assert.IsAssignableFrom <User>(result); Assert.AreEqual("sam", result.FirstName); }