@Parameters
  public static Collection<Object[]> parameters() {
    List<Object[]> params = new ArrayList<>();
    for (Object type : TYPE_COUNT.keySet()) {
      params.add(new Object[] { type, TYPE_COUNT.get(type) });
    }
    return params;
  }
Test the optimization that does not scan files where all key ranges are excluded.
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestScannerSelectionUsingKeyRange.java