public function testMailRun()
{
$raw = new Letter();
$raw->setType('text/plain');
$raw->setData('This mail was automatically sent running the unit tests of Core without render.');
$render = new Html($this->letter);
$html = new Letter();
$html->setData($render->run(null, ['title' => 'Core Mail', 'custom' => 'This mail was automatically sent running the unit tests of Core with the render.']));
$attachment = new Attachment('Invoice.pdf');
$attachment->setType('application/pdf');
$attachment->setData($this->attachment);
$mail = new Mail(['*****@*****.**']);
$mail->setSender('*****@*****.**', 'Developers');
$mail->setSubject('Core Mail');
$mail->addLetter($raw);
$mail->addLetter($html);
$mail->addAttachment($attachment);
$mail->run();
}
