@Test public void testOpenCell2() { f1.openCell(4, 4); assertFalse(f1.isOpen(4, 3)); }
@Test public void testOpenCell4() { f1.openCell(0, 2); assertTrue(f1.isOpen(1, 2)); }
@Test public void testOpenCell1() { f1.openCell(4, 4); assertTrue(f1.isOpen(4, 4)); }