*/
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public class MapsTest extends TestCase {

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

  public void testHashMap() {
    HashMap<Integer, Integer> map = Maps.newHashMap();
    assertEquals(Collections.emptyMap(), map);
  }

  public void testHashMapWithInitialMap() {
    Map<String, Integer> original = new TreeMap<>();