/**
  * If data source contains explicitly provided null values, those should be used
  * @link http://pear.php.net/bugs/bug.php?id=20295
  */
 public function testBug20295()
 {
     $form = new HTML_QuickForm2('bug20295');
     $hs = $form->addHierselect('hs')->loadOptions(array($this->_primary, $this->_secondary))->setValue(array(1, 12));
     $form->addDataSource(new HTML_QuickForm2_DataSource_Array(array('hs' => null)));
     $this->assertNull($hs->getValue());
 }