@Test public void deleteElementTest() { assertFalse(model.deleteElement(0, 0)); model.addSquareBumper(0, 0, 0, "sBump"); assertTrue(model.deleteElement(0, 0)); model.addFlipper(0, 0, true, "flipper"); assertTrue(model.deleteElement(0, 0)); model.addAbsorber("absorb", 0, 0, 20, 20); assertTrue(model.deleteElement(0, 0)); model.addBall("b1", 10, 10, 50, 50); assertTrue(model.deleteElement(0, 0)); }