public void AreaGetDescendants()
{
Area area = new Area();
Assert.That(area.GetDescendants(), Is.Empty);
WorkCentre wc1 = new WorkCentre {name = "WC1"};
area.WorkCentre.Add(wc1);
Assert.That(area.GetDescendants(), Is.Not.Empty);
Assert.That(area.GetDescendants().Count, Is.EqualTo(1));
Assert.That(area.GetDescendants()[0], Is.EqualTo(wc1));
WorkCentre wc2 = new WorkCentre { name = "WC2" };
area.WorkCentre.Add(wc2);
Assert.That(area.GetDescendants(), Is.Not.Empty);
Assert.That(area.GetDescendants().Count, Is.EqualTo(2));
Assert.That(area.GetDescendants()[0], Is.EqualTo(wc1));
Assert.That(area.GetDescendants()[1], Is.EqualTo(wc2));
}
