@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));
}