@Test public void containsAnAtom() { 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); assertTrue(element.contains(focus)); assertTrue(element.contains(peripherals[0])); assertTrue(element.contains(peripherals[1])); assertTrue(element.contains(peripherals[2])); assertTrue(element.contains(peripherals[3])); assertFalse(element.contains(mock(IAtom.class))); }