/**
  * Tests Zend_Service_Amazon_Ec2_Ebs->detachVolume()
  */
 public function testDetachVolume()
 {
     $rawHttpResponse = "HTTP/1.1 200 OK\r\n" . "Date: Fri, 24 Oct 2008 17:24:52 GMT\r\n" . "Server: hi\r\n" . "Last-modified: Fri, 24 Oct 2008 17:24:52 GMT\r\n" . "Status: 200 OK\r\n" . "Content-type: application/xml; charset=utf-8\r\n" . "Expires: Tue, 31 Mar 1981 05:00:00 GMT\r\n" . "Connection: close\r\n" . "\r\n" . "<DetachVolumeResponse xmlns=\"http://ec2.amazonaws.com/doc/2008-12-01/\">\r\n" . "  <volumeId>vol-4d826724</volumeId>\r\n" . "  <instanceId>i-6058a509</instanceId>\r\n" . "  <device>/dev/sdh</device>\r\n" . "  <status>detaching</status>\r\n" . "  <attachTime>2008-05-08T11:51:50.000Z</attachTime>\r\n" . "</DetachVolumeResponse>";
     $this->adapter->setResponse($rawHttpResponse);
     $return = $this->Zend_Service_Amazon_Ec2_Ebs->detachVolume('vol-4d826724');
     $arrVolume = array('volumeId' => 'vol-4d826724', 'instanceId' => 'i-6058a509', 'device' => '/dev/sdh', 'status' => 'detaching', 'attachTime' => '2008-05-08T11:51:50.000Z');
     $this->assertSame($arrVolume, $return);
 }
 /**
  * Checks if a given Amazon EBS volume exists
  * 
  * @param string $volumeId
  * @return boolean
  */
 protected function _volumeExists($volumeId)
 {
     if (empty($volumeId)) {
         return false;
     }
     try {
         $this->_ebs->describeVolume($volumeId);
         return true;
     } catch (Zend_Service_Amazon_Ec2_Exception $e) {
         return false;
     }
 }