function testModify()
{
$cal = new Component\VCalendar();
$param = new Parameter($cal, 'name', null);
$param->addValue(1);
$this->assertEquals(array(1), $param->getParts());
$param->setParts(array(1, 2));
$this->assertEquals(array(1, 2), $param->getParts());
$param->addValue(3);
$this->assertEquals(array(1, 2, 3), $param->getParts());
$param->setValue(4);
$param->addValue(5);
$this->assertEquals(array(4, 5), $param->getParts());
}
