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();