public void testLoadFirst() throws Exception {
assertTrue(dir != null);
assertTrue(fieldInfos != null);
FieldsReader reader = new FieldsReader(dir, TEST_SEGMENT_NAME, fieldInfos);
assertTrue(reader.size() == 1);
LoadFirstFieldSelector fieldSelector = new LoadFirstFieldSelector();
Document doc = reader.doc(0, fieldSelector);
assertTrue("doc is null and it shouldn't be", doc != null);
int count = 0;
List<Fieldable> l = doc.getFields();
for (final Fieldable fieldable : l ) {