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