protected function takeChildFromDOM($child)
 {
     $absoluteNodeName = $child->namespaceURI . ':' . $child->localName;
     switch ($absoluteNodeName) {
         case $this->lookupNamespace('atom') . ':' . 'content':
             $content = new Zend_Gdata_App_Extension_Content();
             $content->transferFromDOM($child);
             $this->_content = $content;
             break;
         case $this->lookupNamespace('atom') . ':' . 'published':
             $published = new Zend_Gdata_App_Extension_Published();
             $published->transferFromDOM($child);
             $this->_published = $published;
             break;
         case $this->lookupNamespace('atom') . ':' . 'source':
             $source = new Zend_Gdata_App_Extension_Source();
             $source->transferFromDOM($child);
             $this->_source = $source;
             break;
         case $this->lookupNamespace('atom') . ':' . 'summary':
             $summary = new Zend_Gdata_App_Extension_Summary();
             $summary->transferFromDOM($child);
             $this->_summary = $summary;
             break;
         case $this->lookupNamespace('app') . ':' . 'control':
             $control = new Zend_Gdata_App_Extension_Control();
             $control->transferFromDOM($child);
             $this->_control = $control;
             break;
         default:
             parent::takeChildFromDOM($child);
             break;
     }
 }

 public function testContentWithSrcAndTypeToAndFromStringShouldMatch()
 {
     $this->content->src = 'http://www.example.com/image.png';
     $this->content->type = 'image/png';
     $contentXml = $this->content->saveXML();
     $newContent = new Zend_Gdata_App_Extension_Content();
     $newContent->transferFromXML($contentXml);
     $newContentXml = $newContent->saveXML();
     $this->assertEquals($newContentXml, $contentXml);
     $this->assertEquals('http://www.example.com/image.png', $newContent->src);
     $this->assertEquals('image/png', $newContent->type);
 }