public function testSetLanguage()
 {
     $lang = new Zend_Translate(Zend_Translate::AN_ARRAY, array('msg1' => 'Message 1'), 'en');
     $lang->addTranslation('ru', array('msg1' => 'Message 1 (ru)'));
     $this->assertEquals($lang->getLanguage(), 'en');
     $lang->setLanguage('ru');
     $this->assertEquals($lang->getLanguage(), 'ru');
 }