@Test
public void testEquals() {

    LOG.info("testEquals");
    final GpsTracePoint s = y.withTime(x1).withPosition(x2);
    final GpsTracePoint t = x.withTime(y1).withPosition(y2);
    Assert.assertTrue(x.equals(s));
    Assert.assertTrue(y.equals(t));
    Assert.assertFalse(x.equals(t));
    Assert.assertFalse(y.equals(s));
}