assertThat(globalOrdinals, instanceOf(GlobalOrdinalsIndexFieldData.class));
AtomicOrdinalsFieldData afd = globalOrdinals.load(topLevelReader.leaves().get(0));
RandomAccessOrds values = afd.getOrdinalsValues();
values.setDocument(0);
assertThat(values.cardinality(), equalTo(2));
long ord = values.nextOrd();
assertThat(ord, equalTo(3l));
assertThat(values.lookupOrd(ord).utf8ToString(), equalTo("02"));
ord = values.nextOrd();
assertThat(ord, equalTo(5l));
assertThat(values.lookupOrd(ord).utf8ToString(), equalTo("04"));