setFrom('from@example.com') ->setTo('to@example.com') ->setSubject('test') ; $cid = $message->embed(Swift_Image::fromPath(__DIR__.'/../../_samples/files/swiftmailer.png')); $message->setBody('', 'text/html'); $that = $this; $messageValidation = function (Swift_Mime_Message $message) use ($that) { preg_match('/cid:(.*)"/', $message->toString(), $matches); $cid = $matches[1]; preg_match('/Content-ID: <(.*)>/', $message->toString(), $matches); $contentId = $matches[1]; $that->assertEquals($cid, $contentId, 'cid in body and mime part Content-ID differ'); return true; }; $failedRecipients = array(); $transport = m::mock('Swift_Transport'); $transport->shouldReceive('isStarted')->andReturn(true); $transport->shouldReceive('send')->with(m::on($messageValidation), $failedRecipients)->andReturn(1); $memorySpool = new Swift_MemorySpool(); $memorySpool->queueMessage($message); $memorySpool->flushQueue($transport, $failedRecipients); } }