} catch (NoSuchElementException e) {
          assertTrue(filtered.isEmpty());
        }
      }
    }

    @SuppressWarnings("unchecked")
    public void testHeadSet() {
      for (List<Integer> contents : SAMPLE_INPUTS) {
        for (int i = 0; i < 10; i++) {
          assertEquals(
              filter((C) createUnfiltered(contents).headSet(i), EVEN),

    assertEquals(
        ImmutableSet.of(), ContiguousSet.create(Range.greaterThan(Integer.MAX_VALUE), integers()));
  }

  public void testHeadSet() {
    ImmutableSortedSet<Integer> set = ContiguousSet.create(Range.closed(1, 3), integers());
    assertThat(set.headSet(1)).isEmpty();
    assertThat(set.headSet(2)).containsExactly(1).inOrder();

    assertEquals(
        ImmutableSet.of(), ContiguousSet.create(Range.greaterThan(Integer.MAX_VALUE), integers()));
  }

  public void testHeadSet() {
    ImmutableSortedSet<Integer> set = ContiguousSet.create(Range.closed(1, 3), integers());
    assertThat(set.headSet(1)).isEmpty();
    assertThat(set.headSet(2)).containsExactly(1).inOrder();