public void Test_Insert() { var user1 = new User("firstname1", "lastname1", 1, "id1"); var user2 = new User("firstname2", "lastname2", 2, "id2"); repository.Insert(user1); repository.Insert(user2); Assert.Equal(2, repository.Count()); Assert.Equal(user1, repository.GetByIdNumber("id1")); Assert.Equal(user2, repository.GetByIdNumber("id2")); }