### Question:
PinotSegmentRecordReader implements RecordReader { public PinotSegmentRecordReader(File indexDir) throws Exception { this(indexDir, null, null); } PinotSegmentRecordReader(File indexDir);  PinotSegmentRecordReader(File indexDir, @Nullable Schema schema, @Nullable List<String> sortOrder); Schema getSchema(); @Override void init(File dataFile, Set<String> fieldsToRead, @Nullable RecordReaderConfig recordReaderConfig); @Override boolean hasNext(); @Override GenericRow next(); @Override GenericRow next(GenericRow reuse); @Override void rewind(); @Override void close();  }### Answer:
@Test public void testPinotSegmentRecordReader() throws Exception { List<GenericRow> outputRows = new ArrayList<>(); try (PinotSegmentRecordReader pinotSegmentRecordReader = new PinotSegmentRecordReader(_segmentIndexDir)) { while (pinotSegmentRecordReader.hasNext()) { outputRows.add(pinotSegmentRecordReader.next()); } } Assert.assertEquals(outputRows.size(), _rows.size(), "Number of _rows returned by PinotSegmentRecordReader is incorrect"); for (int i = 0; i < outputRows.size(); i++) { GenericRow outputRow = outputRows.get(i); GenericRow row = _rows.get(i); Assert.assertEquals(outputRow.getValue(D_SV_1), row.getValue(D_SV_1)); Assert.assertTrue(PinotSegmentUtil.compareMultiValueColumn(outputRow.getValue(D_MV_1), row.getValue(D_MV_1))); Assert.assertEquals(outputRow.getValue(M1), row.getValue(M1)); Assert.assertEquals(outputRow.getValue(M2), row.getValue(M2)); Assert.assertEquals(outputRow.getValue(TIME), row.getValue(TIME)); } }