public async Task ExistsUser_ReturnsBool() { #region Arrange InMemoryUserRepository inMemoryUserRepository = new InMemoryUserRepository(memoryCache); UserId userId = new UserId(UserIdMother.Id()); User user = new User(userId); #endregion #region Act await inMemoryUserRepository.Save(user); bool exists = await inMemoryUserRepository.Exists(userId); #endregion #region Assert Assert.True(exists); #endregion }