public void Translate() { Rect rec = new Rect(new Point(), 3, 5); rec.translate(5, 5); //Did it move upperLeft? Assert.AreEqual(rec.getUpperLeftVertex().getX(), 5); Assert.AreEqual(rec.getUpperLeftVertex().getY(), 10); //Did it move lowerRight? Assert.AreEqual(rec.getWidth(), 3); Assert.AreEqual(rec.getHeight(), 5); }