PHPUnit_Framework_TestSuite::setBackupGlobals PHP Method

    public function setBackupGlobals($backupGlobals)
    {
        if (is_null($this->backupGlobals) && is_bool($backupGlobals)) {
            $this->backupGlobals = $backupGlobals;
        }
    }

 private function createAndPerform($filename, $test_suite_function, array $args = array())
 {
     $suite = new PHPUnit_Framework_TestSuite();
     $suite->addTestFile($filename);
     $suite->setBackupGlobals($this->backupGlobals);
     $suite->setBackupStaticAttributes($this->backupStaticAttributes);
     $result = call_user_func_array(array($suite, $test_suite_function), $args);
     unset($suite);
     return $result;
 }