@Test
public void testMetaFactsAsPropsEmptyResult() {

  when(objectFactDao.searchFacts(any())).thenReturn(ResultContainer.<FactRecord>builder().build());
  FactRecord fact = new FactRecord().setId(UUID.randomUUID());
  List<PropertyEntry<?>> props = helper.getMetaFactsAsProperties(fact, TraverseParams.builder().build());
  assertEquals(0, props.size());
  verify(objectFactDao).searchFacts(argThat(arg -> {
    assertEquals(set(fact.getId()), arg.getInReferenceTo());
    return true;
  }));
}