@Test
public void testFilterExcludedColumns() {

    Trigger trigger = new Trigger();
    trigger.setExcludedColumnNames("col1, col3, col5");
    Column[] param = buildColumnArray();
    Column[] expected = new Column[] { param[1], param[3], param[5] };
    assertArrayEquals("Excluded wrong set of columns", expected, 
            trigger.filterExcludedColumns(param));        
}