for test (use session) app/Lib/Network/EmailDebugTransport.php

EmailDebugTransport.php

<?php
/**
 * Emulates the email sending process for testing purposes
 *
 * PHP 5
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       Cake.Network.Email
 * @since         CakePHP(tm) v 2.0.0
 * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
 */

/**
 * Debug Transport class, useful for emulate the email sending process and inspect the resulted
 * email message before actually send it during development
 *
 * @package       Cake.Network.Email
 */
class DebugTransport extends AbstractTransport {


    const sessionKey = 'Cake.Network.Email.DebugTransport';

/**
 * Send mail
 *
 * @param CakeEmail $email CakeEmail
 * @return array
 */
    public function send(CakeEmail $email) {
        $headersAndMessage = $this->_send($email);

        // {{{ for test
        // テストの開始時(または終了時)、$_SESSION の初期化が必要
        $stores = CakeSession::read(self::sessionKey);
        if (!$stores) { // null, false
            $stores = array($headersAndMessage);
        } else {
            $stores[] = $headersAndMessage;
        }
        CakeSession::write(self::sessionKey, $stores);
        // }}} for test

        return $headersAndMessage;
    }

    public function _send(CakeEmail $email) {
        $headers = $email->getHeaders(array('from', 'sender', 'replyTo', 'readReceipt', 'returnPath', 'to', 'cc', 'bcc', 'subject'));
        $headers = $this->_headersToString($headers);
        $message = implode("\r\n", (array)$email->message());
        return array('headers' => $headers, 'message' => $message);
    }

}