public function testExtensionAttributes()
 {
     $extensionAttributes = $this->emailList->extensionAttributes;
     $extensionAttributes['foo1'] = array('name' => 'foo1', 'value' => 'bar');
     $extensionAttributes['foo2'] = array('name' => 'foo2', 'value' => 'rab');
     $this->emailList->extensionAttributes = $extensionAttributes;
     $this->assertEquals('bar', $this->emailList->extensionAttributes['foo1']['value']);
     $this->assertEquals('rab', $this->emailList->extensionAttributes['foo2']['value']);
     $emailListXml = $this->emailList->saveXML();
     $newEmailList = new Zend_Gdata_Gapps_Extension_EmailList();
     $newEmailList->transferFromXML($emailListXml);
     $this->assertEquals('bar', $newEmailList->extensionAttributes['foo1']['value']);
     $this->assertEquals('rab', $newEmailList->extensionAttributes['foo2']['value']);
 }