@Test
public void testConstructMessage() {

  Map<TableAndRow, IOException> exceptions = new TreeMap<TableAndRow, IOException>();
  exceptions.put(new TableAndRow(TABLENAME, ROW), new IOException("exceptionA"));
  exceptions.put(new TableAndRow(TABLENAME, ANOTHER_ROW), new IOException("exceptionB"));
  System.out.println(MultiRowExceptions.constructMessage(exceptions));
}