@Test(expected = UnsupportedOperationException.class) public void noBuilder() { IAtom focus = mock(IAtom.class); IAtom[] peripherals = new IAtom[]{mock(IAtom.class), mock(IAtom.class), mock(IAtom.class), mock(IAtom.class)}; ExtendedTetrahedral element = new ExtendedTetrahedral(focus, peripherals, CLOCKWISE); element.getBuilder(); }