@Test
  public void testRowCounterHiddenColumn() throws Exception {
    String[] args = new String[] { TABLE_NAME, COL_FAM + ":" + COL2 };
    runRowCount(args, 10);
  }
Test a case when the column specified in command line arguments is not part of first KV for a
row.
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestRowCounter.java