public function testAddAttachmentToMultipartMessage()
{
$message = <<<EOT
Date: Fri, 13 Feb 09 15:47:25 +0100
MIME-Version: 1.0
To: John Doe <*****@*****.**>
Content-Type: multipart/mixed; boundary="c67476988f320ca04d61815bcfd14361"
This is a multi-part message in MIME format.
--c67476988f320ca04d61815bcfd14361
Content-Type: multipart/alternative; boundary="c67476988f320ca04d61815bcfd14360"
This is a multi-part message in MIME format.
--c67476988f320ca04d61815bcfd14360
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8bit
test
--c67476988f320ca04d61815bcfd14360
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: 8bit
<b>test</b>
--c67476988f320ca04d61815bcfd14360--
--c67476988f320ca04d61815bcfd14361
Content-Type: image/png; name="hello.png"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="hello.png"
iVBORw0KGgoAAAANSUhEUgAAAAYAAAAFCAYAAABmWJ3mAAAAAXNSR0IArs4c6QAAAAZiS0dE
AP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAIBJREFUCNc9yK8OQWEcx+HPiyCb
JtjciKaZILgARTRXwfQTXIVGM03xZwLZtHN2zpiZ2fu+v6/miY+b7EYyRcwMJMo4us0+lWgB
WcQJEPRaA9qNDqxuS12Ks8bboTb3tSQpRC+e34ckKf9k/0z2U5WS04y3f1Gr1jEZi8Oca3rk
B3WXTGfs7Y8kAAAAAElFTkSuQmCC
--c67476988f320ca04d61815bcfd14361--
EOT;
$mp = new Mime\Multipart();
$mp->setBoundary('c67476988f320ca04d61815bcfd14360');
$mp->addPart(new Mime\Part('test'));
$mp->addPart(new Mime\Part('<b>test</b>', 'text/html'));
$mail = new Mail($this->date);
$mail->addTo('*****@*****.**', 'John Doe');
$mail->setContent($mp);
$mail->addAttachment(file_get_contents(__DIR__ . '/files/image.png'), 'hello.png', 'image/png');
$mail->setBoundary('c67476988f320ca04d61815bcfd14361');
$this->assertEquals($message, (string) $mail);
}