@Test
  public void givenIds_whenDeleteBulk_thenPersonsAreDeleted() {

    List<String> ids = new ArrayList<>();

    // add some person documents
    for (int i = 0; i < 5; i++) {
      ids.add(insertRandomPersonDocument().id());
    }

    // perform bulk delete
    personService.deleteBulk(ids);

    // check results
    for (String id : ids) {
      assertNull(bucket.get(id));
    }
  }