public function testInvalidObject()
 {
     try {
         Shippo_Address::retrieve('invalid');
     } catch (Shippo_InvalidRequestError $e) {
         $this->assertEqual(404, $e->getHttpStatus());
     }
 }
 public function testInvalidRetrieve()
 {
     $address = self::getDefaultAddress();
     $retrieve_address = Shippo_Address::retrieve($address->object_id);
     $this->assertNotEqual($retrieve_address->object_id, 'Invalid Value');
 }