@Test
public void augmentWithAncestorsIncludeRoot() {

  assertEquals(
    ImmutableSet.of(
      TermId.of("HP:0000001"),
      TermId.of("HP:0000002"),
      TermId.of("HP:0000003"),
      TermId.of("HP:0000004"),
      TermId.of("HP:0000005")
    ),
    TermIds.augmentWithAncestors(ontology, Sets.newHashSet(id1), true));
}