public void adding_few_item_sould_work_properly()
{
QList <Person> list = new QList <Person>();
Person person1 = PersonHelper.CreateTestPerson();
Person person2 = PersonHelper.CreateTestPerson();
Person person3 = PersonHelper.CreateTestPerson();
Person person4 = PersonHelper.CreateTestPerson();
Person person5 = PersonHelper.CreateTestPerson();
list.Add(person1);
list.Add(person2);
list.Add(person3);
list.Add(person4);
list.Add(person5);
Assert.AreEqual(5, list.Count);
Assert.AreEqual(person1, list[0]);
Assert.AreEqual(person1, list.FirstOrDefault());
Assert.AreEqual(person2, list[1]);
Assert.AreEqual(person3, list[2]);
Assert.AreEqual(person4, list[3]);
Assert.AreEqual(person5, list[4]);
Assert.AreEqual(person5, list.LastOrDefault());
}