@Test public void remap1() 
{

    ColumnMap x = new ColumnMap("SPO->POS", 2,0,1) ;   // S->2 etc
    
    Integer[] array = {0,1,2 } ;
    assertEquals(Integer.valueOf(2), x.mapSlot(0, array) ) ;   
    assertEquals(Integer.valueOf(0), x.mapSlot(1, array) ) ; 
    assertEquals(Integer.valueOf(1), x.mapSlot(2, array) ) ; 
}