assertThat(LongIterators.unwrap(set.iterator(2)),
equalTo(new long[]{7, 42, 639}));
assertThat(LongIterators.unwrap(set.iterator(7)),
equalTo(new long[]{42, 639}));
assertThat(set.headSet(42), hasSize(2));
assertThat(set.toLongArray(),
equalTo(new long[]{2, 7, 42, 639}));
}
@Test
public void testMaskLast() {