public void FindByLastnameTest()
{
//Arrange
People people = new People();
ToDoItems toDo = new ToDoItems();
PersonSequencer.Reset();
TodoSequencer.ResetID();
Person Doe = people.AddNewPerson(1, "Jane", "Doe");
Person Smith = people.AddNewPerson(2, "John", "Smith");
ToDo item1 = toDo.AddNewToDoNew(1, "Win lotto", false, Doe);
ToDo item2 = toDo.AddNewToDoNew(2, "Learn to code", false, Smith);
//Act
ToDo[] result = toDo.FindByLastname(Doe);
ToDo[] result2 = toDo.FindByLastname(Smith);
//Assert
Assert.Contains(item1, result);
Assert.Contains(item2, result2);
}