public function testExtensionAttributes()
 {
     $extensionAttributes = $this->author->extensionAttributes;
     $extensionAttributes['foo1'] = array('name' => 'foo1', 'value' => 'bar');
     $extensionAttributes['foo2'] = array('name' => 'foo2', 'value' => 'rab');
     $this->author->extensionAttributes = $extensionAttributes;
     $this->assertEquals('bar', $this->author->extensionAttributes['foo1']['value']);
     $this->assertEquals('rab', $this->author->extensionAttributes['foo2']['value']);
     $authorXml = $this->author->saveXML();
     $newAuthor = new Zend_Gdata_App_Extension_Author();
     $newAuthor->transferFromXML($authorXml);
     //var_dump($this->author);
     //print $authorXml;
     $this->assertEquals('bar', $newAuthor->extensionAttributes['foo1']['value']);
     $this->assertEquals('rab', $newAuthor->extensionAttributes['foo2']['value']);
 }