/**
  * test for unserialization
  * expected object
  */
 public function testLengthUnSerialize()
 {
     $value = new Zend_Measure_Length('string -100.100,200', Zend_Measure_Length::STANDARD, 'de');
     $serial = $value->serialize();
     $newvalue = unserialize($serial);
     $this->assertTrue($value->equals($newvalue), 'Zend_Measure_Length not unserialized');
 }