public class MapsTest extends TestCase {

  private static final Comparator<Integer> SOME_COMPARATOR = Collections.reverseOrder();

  public void testHashMap() {
    @SuppressWarnings("UseCollectionConstructor") // test of factory method
    HashMap<Integer, Integer> map = Maps.newHashMap();
    assertEquals(emptyMap(), map);
  }

  public void testHashMapWithInitialMap() {