public function testSetReturnPath()
 {
     $ReturnPath = getProperty('SimpleMailer', 'ReturnPath');
     $mailer = new SimpleMailer();
     $mailer->setFromEncoding("EUC-JP");
     $mailer->setCharSet("UTF-8");
     $mailer->setReturnPath('*****@*****.**');
     $returnPath = $ReturnPath->getValue($mailer);
     $this->assertEquals('*****@*****.**', $returnPath[0]);
     $this->assertEquals('', $returnPath[1]);
     $mailer->setReturnPath('*****@*****.**', hex2bin('a5c6a5b9a5c8a5c7a1bca5bfa1bc'));
     $returnPath = $ReturnPath->getValue($mailer);
     $this->assertEquals('*****@*****.**', $returnPath[0]);
     $this->assertEquals('テストデーター', $returnPath[1]);
 }