private void isExpectedRowWithoutTimestamps(final int rowIndex, List<Cell> kvs) {
    int i = 0;
    for (Cell kv : kvs) {
      byte[] expectedColname = makeQualifier(rowIndex, i++);
      assertTrue("Column name", CellUtil.matchingQualifier(kv, expectedColname));
      // Value is column name as bytes. Usually result is
      // 100 bytes in size at least. This is the default size
      // for BytesWriteable. For comparison, convert bytes to
      // String and trim to remove trailing null bytes.
      assertTrue("Content", CellUtil.matchingValue(kv, expectedColname));
    }
  }
Adds {@link #ROW_COUNT} rows and {@link #QUALIFIER_COUNT}
@param hmc Instance to add rows to.
@return How many rows we added.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDefaultMemStore.java