public void ShouldAddMember() { //arrange var usersRepository = new UsersRepository(_connectionString); var chatRepository = new ChatsRepository(_connectionString, usersRepository); //act chatRepository.AddMember(_chat.Id, _users[2].Id); _tempChatIdMemberIds.Add(new ChatIdMemberId { ChatId = _chat.Id, MemberId = _users[2].Id }); var members = chatRepository.GetMembers(_chat.Id); //Assert Assert.IsTrue(members.Select(x => x.Id).Contains(_users[2].Id)); }