private int countRecordsInQueryInterval(final SamReader reader, final QueryInterval query) {
   final SAMRecordIterator iter = reader.queryOverlapping(new QueryInterval[] {query});
   int count = 0;
   while (iter.hasNext()) {
     iter.next();
     count++;
   }
   iter.close();
   return count;
 }
 private int countRecords(final SamReader reader) {
   int count = 0;
   try (final SAMRecordIterator iter = reader.iterator()) {
     while (iter.hasNext()) {
       iter.next();
       count++;
     }
   }
   return count;
 }
  @Test(dataProvider = "composeAllPermutationsOfSamInputResource")
  public void queryInputResourcePermutation(final SamInputResource resource) throws IOException {
    final SamReader reader = SamReaderFactory.makeDefault().open(resource);
    LOG.info(String.format("Query from %s ...", resource));
    if (reader.hasIndex()) {
      final StopWatch stopWatch = new StopWatch();
      stopWatch.start();
      final SAMRecordIterator q1 = reader.query("chr1", 500000, 100000000, true);
      observedRecordOrdering1.add(Iterables.slurp(q1));
      q1.close();
      final SAMRecordIterator q20 = reader.query("chr20", 1, 1000000, true);
      observedRecordOrdering20.add(Iterables.slurp(q20));
      q20.close();
      final SAMRecordIterator q3 = reader.query("chr3", 1, 10000000, true);
      observedRecordOrdering3.add(Iterables.slurp(q3));
      q3.close();
      stopWatch.stop();
      LOG.info(String.format("Finished queries in %sms", stopWatch.getElapsedTime()));

      Assert.assertEquals(
          observedRecordOrdering1.size(), 1, "read different records for chromosome 1");
      Assert.assertEquals(
          observedRecordOrdering20.size(), 1, "read different records for chromosome 20");
      Assert.assertEquals(
          observedRecordOrdering3.size(), 1, "read different records for chromosome 3");
    } else if (resource.indexMaybe() != null) {
      LOG.warn("Resource has an index source, but is not indexed: " + resource);
    } else {
      LOG.info("Skipping query operation: no index.");
    }
    reader.close();
  }