@Test public void remap3() 
{

    ColumnMap x = new ColumnMap("POS", 2,0,1) ;
    Tuple<String> tuple = tuple("S", "P", "O") ;
    Tuple<String> mapped = x.map(tuple) ;
    Tuple<String> expected = tuple("P", "O", "S") ;
    assertEquals(expected, mapped) ;
}