@Test
public void testHashCode() throws Exception {
assertEquals(open.hashCode(), equal.hashCode());
assertNotEquals(open.hashCode(), close.hashCode());
assertNotEquals(open.hashCode(), openTrue.hashCode());
}
@Test
public void testGetTile() throws Exception {
assertEquals(M2, open.getTile());
assertEquals(M2, close.getTile());
assertEquals(P3, openTrue.getTile());
}