function test_getUpgradeLogFileName()
 {
     $oUpgrade = new OA_Upgrade();
     $oUpgrade->package_file = 'openads_upgrade_1_to_2.xml';
     $pattern = '/openads_upgrade_1_to_2_[\\d]{4}_[\\d]{2}_[\\d]{2}_[\\d]{2}_[\\d]{2}_[\\d]{2}\\.log/';
     $logfile = $oUpgrade->_getUpgradeLogFileName();
     $this->assertWantedPattern($pattern, $logfile, 'wrong logfile pattern: ' . $logfile);
 }