public function testCustomHeadersQueue()
{
$mail = new CM_Mail();
$subject = uniqid();
$mail->setSubject($subject);
$mail->addCustomHeader('X-Foo', 'bar');
$mail->addCustomHeader('X-Bar', 'foo');
$mail->addCustomHeader('X-Foo', 'baz');
$mail->addTo('test');
$mail->setText('bla');
$mail->send(true);
$result = CM_Db_Db::select('cm_mail', 'customHeaders', array('subject' => $subject));
$row = $result->fetch();
$this->assertEquals(unserialize($row['customHeaders']), array('X-Foo' => ['bar', 'baz'], 'X-Bar' => ['foo']));
}