@Test public void noneOf() throws Exception {

    IntSet one = IntSet.noneOf(0, 1, 3, 5);
    assertFalse(one.contains(0));
    assertFalse(one.contains(1));
    assertTrue(one.contains(2));
    assertFalse(one.contains(3));
    assertTrue(one.contains(4));
    assertFalse(one.contains(5));
    assertTrue(one.contains(6));
}