public void TestToString() { Area area = new Area("My Area"); Assert.That(area.ToString(), Is.EqualTo("Area 'My Area'")); area.Area1.AddArea("Area 1"); Assert.That(area.ToString(), Is.EqualTo("Area 'My Area'")); area.WorkCentre.AddWorkCentre("Work Centre 1"); Assert.That(area.ToString(), Is.EqualTo("Area 'My Area'")); }