FirstRingRegion implements Serializable, Cloneable { @Override public Object clone() { return new FirstRingRegion(this.center); } FirstRingRegion(final String geohash); @Override Object clone();  }
@Test public void testClone() { FirstRingRegion actual; FirstRingRegion expected; expected = new FirstRingRegion("u1x0etp"); actual = (FirstRingRegion)expected.clone(); assertEquals(expected, actual); }