Merge pull request #1049 from klimov-paul/email-swift-2

.travis.yml

@@ -18,7 +18,7 @@ before_script:
   - tests/unit/data/travis/cubrid-setup.sh
 
 script:
-  - phpunit --coverage-clover tests/unit/runtime/coveralls/clover.xml --verbose --exclude-group mssql,oci,wincache,xcache,zenddata
+  - phpunit --coverage-clover tests/unit/runtime/coveralls/clover.xml --verbose --exclude-group mssql,oci,wincache,xcache,zenddata,vendor
 
 after_script:
   - php vendor/bin/coveralls

extensions/swiftmailer/LICENSE.md

+The Yii framework is free software. It is released under the terms of
+the following BSD License.
+
+Copyright © 2008-2013 by Yii Software LLC (http://www.yiisoft.com)
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+ * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in
+   the documentation and/or other materials provided with the
+   distribution.
+ * Neither the name of Yii Software LLC nor the names of its
+   contributors may be used to endorse or promote products derived
+   from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.

extensions/swiftmailer/README.md

+Yii 2.0 Public Preview - SwiftMailer Mail Solution
+==================================================
+
+Thank you for choosing Yii - a high-performance component-based PHP framework.
+
+If you are looking for a production-ready PHP framework, please use
+[Yii v1.1](https://github.com/yiisoft/yii).
+
+Yii 2.0 is still under heavy development. We may make significant changes
+without prior notices. **Yii 2.0 is not ready for production use yet.**
+
+[![Build Status](https://secure.travis-ci.org/yiisoft/yii2.png)](http://travis-ci.org/yiisoft/yii2)
+
+This is the yii2-swiftmailer extension.
+
+
+Installation
+------------
+
+The preferred way to install this extension is through [composer](http://getcomposer.org/download/).
+
+Either run
+```
+php composer.phar require yiisoft/yii2-swiftmailer "*"
+```
+
+or add
+```json
+"yiisoft/yii2-swiftmailer": "*"
+```
+to the require section of your composer.json.
+
+
+*Note: You might have to run `php composer.phar selfupdate`*
+
+
+Usage & Documentation
+---------------------
+
+This extension has to be registered prior to usage.
+To enable this view renderer add it to the $rendereres property of your view object.
+
+Example:
+
+```php
+<?php
+// config.php
+return [
+	//....
+	'components' => [
+		'mail' => [
+			'class' => 'yii\swiftmailer\Mailer',
+		],
+	],
+];
+```
+
+For further instructions refer to the related section in the yii guide.

extensions/swiftmailer/composer.json

+{
+	"name": "yiisoft/yii2-swiftmailer",
+	"description": "The SwiftMailer integration for the Yii framework",
+	"keywords": ["yii", "swift", "swiftmailer", "mail", "email", "mailer"],
+	"type": "yii2-extension",
+	"license": "BSD-3-Clause",
+	"support": {
+		"issues": "https://github.com/yiisoft/yii2/issues?state=open",
+		"forum": "http://www.yiiframework.com/forum/",
+		"wiki": "http://www.yiiframework.com/wiki/",
+		"irc": "irc://irc.freenode.net/yii",
+		"source": "https://github.com/yiisoft/yii2"
+	},
+	"authors": [
+		{
+			"name": "Paul Klimov",
+			"email": "klimov.paul@gmail.com"
+		}
+	],
+	"minimum-stability": "dev",
+	"require": {
+		"yiisoft/yii2": "*",
+		"swiftmailer/swiftmailer": "@stable"
+	},
+	"autoload": {
+		"psr-0": { "yii\\swiftmailer\\": "" }
+	}
+}

extensions/swiftmailer/yii/swiftmailer/Mailer.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\swiftmailer;
+
+use yii\base\InvalidConfigException;
+use yii\mail\BaseMailer;
+use Yii;
+
+/**
+ * Mailer based on SwiftMailer library.
+ *
+ * By default PHP 'mail' function will be used as default email transport.
+ * You can setup different email transport via [[vendorMailer]] property:
+ * ~~~
+ * 'components' => array(
+ *     ...
+ *     'email' => array(
+ *         'class' => 'yii\swiftmailer\Mailer',
+ *         'transport' => [
+ *             'class' => 'Swift_SmtpTransport',
+ *             'host' => 'localhost',
+ *             'username' => 'username',
+ *             'password' => 'password',
+ *             'port' => '587',
+ *             'encryption' => 'tls',
+ *         ],
+ *     ),
+ *     ...
+ * ),
+ * ~~~
+ *
+ * @see http://swiftmailer.org
+ *
+ * @method Message compose($view = null, array $params = []) creates new message optionally filling up its body via view rendering.
+ *
+ * @author Paul Klimov <klimov.paul@gmail.com>
+ * @since 2.0
+ */
+class Mailer extends BaseMailer
+{
+	/**
+	 * @var string message default class name.
+	 */
+	public $messageClass = 'yii\swiftmailer\Message';
+	/**
+	 * @var \Swift_Mailer Swift mailer instance.
+	 */
+	private $_swiftMailer;
+	/**
+	 * @var \Swift_Transport|array Swift transport instance or its array configuration.
+	 */
+	private $_transport = [];
+
+	/**
+	 * @return array|\Swift_Mailer Swift mailer instance or array configuration.
+	 */
+	public function getSwiftMailer()
+	{
+		if (!is_object($this->_swiftMailer)) {
+			$this->_swiftMailer = $this->createSwiftMailer();
+		}
+		return $this->_swiftMailer;
+	}
+
+	/**
+	 * @param array|\Swift_Transport $transport
+	 * @throws \yii\base\InvalidConfigException on invalid argument.
+	 */
+	public function setTransport($transport)
+	{
+		if (!is_array($transport) && !is_object($transport)) {
+			throw new InvalidConfigException('"' . get_class($this) . '::transport" should be either object or array, "' . gettype($transport) . '" given.');
+		}
+		$this->_transport = $transport;
+	}
+
+	/**
+	 * @return array|\Swift_Transport
+	 */
+	public function getTransport()
+	{
+		if (!is_object($this->_transport)) {
+			$this->_transport = $this->createTransport($this->_transport);
+		}
+		return $this->_transport;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function send($message)
+	{
+		Yii::trace('Sending email message', __METHOD__);
+		return ($this->getSwiftMailer()->send($message->getSwiftMessage()) > 0);
+	}
+
+	/**
+	 * Creates Swift mailer instance.
+	 * @return \Swift_Mailer mailer instance.
+	 */
+	protected function createSwiftMailer()
+	{
+		return \Swift_Mailer::newInstance($this->getTransport());
+	}
+
+	/**
+	 * Creates email transport instance by its array configuration.
+	 * @param array $config transport configuration.
+	 * @throws \yii\base\InvalidConfigException on invalid transport configuration.
+	 * @return \Swift_Transport transport instance.
+	 */
+	protected function createTransport(array $config)
+	{
+		if (array_key_exists('class', $config)) {
+			$className = $config['class'];
+			unset($config['class']);
+		} else {
+			$className = 'Swift_MailTransport';
+		}
+		$transport = call_user_func([$className, 'newInstance']);
+		if (!empty($config)) {
+			foreach ($config as $name => $value) {
+				if (property_exists($transport, $name)) {
+					$transport->$name = $value;
+				} else {
+					$setter = 'set' . $name;
+					if (method_exists($transport, $setter)) {
+						$transport->$setter($value);
+					} else {
+						throw new InvalidConfigException('Setting unknown property: ' . get_class($transport) . '::' . $name);
+					}
+				}
+			}
+		}
+		return $transport;
+	}
+}
\ No newline at end of file

extensions/swiftmailer/yii/swiftmailer/Message.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\swiftmailer;
+
+use yii\mail\BaseMessage;
+
+/**
+ * Email message based on SwiftMailer library.
+ *
+ * @see http://swiftmailer.org/docs/messages.html
+ * @see \yii\swiftmailer\Mailer
+ *
+ * @method Mailer getMailer() returns mailer instance.
+ * @property \Swift_Message $swiftMessage vendor message instance.
+ *
+ * @author Paul Klimov <klimov.paul@gmail.com>
+ * @since 2.0
+ */
+class Message extends BaseMessage
+{
+	/**
+	 * @var \Swift_Message Swift message instance.
+	 */
+	private $_swiftMessage;
+
+	/**
+	 * @return \Swift_Message Swift message instance.
+	 */
+	public function getSwiftMessage()
+	{
+		if (!is_object($this->_swiftMessage)) {
+			$this->_swiftMessage = $this->createSwiftMessage();
+		}
+		return $this->_swiftMessage;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function charset($charset)
+	{
+		$this->getSwiftMessage()->setCharset($charset);
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function from($from)
+	{
+		$this->getSwiftMessage()->setFrom($from);
+		$this->getSwiftMessage()->setReplyTo($from);
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function to($to)
+	{
+		$this->getSwiftMessage()->setTo($to);
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function cc($cc)
+	{
+		$this->getSwiftMessage()->setCc($cc);
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function bcc($bcc)
+	{
+		$this->getSwiftMessage()->setBcc($bcc);
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function subject($subject)
+	{
+		$this->getSwiftMessage()->setSubject($subject);
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function textBody($text)
+	{
+		$this->setBody($text, 'text/plain');
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function htmlBody($html)
+	{
+		$this->setBody($html, 'text/html');
+		return $this;
+	}
+
+	/**
+	 * Sets the message body.
+	 * If body is already set and its content type matches given one, it will
+	 * be overridden, if content type miss match the multipart message will be composed.
+	 * @param string $body body content.
+	 * @param string $contentType body content type.
+	 */
+	protected function setBody($body, $contentType)
+	{
+		$message = $this->getSwiftMessage();
+		$oldBody = $message->getBody();
+		if (empty($oldBody)) {
+			$parts = $message->getChildren();
+			$partFound = false;
+			foreach ($parts as $key => $part) {
+				if (!($part instanceof \Swift_Mime_Attachment)) {
+					/* @var $part \Swift_Mime_MimePart */
+					if ($part->getContentType() == $contentType) {
+						unset($parts[$key]);
+						$partFound = true;
+						break;
+					}
+				}
+			}
+			if ($partFound) {
+				reset($parts);
+				$message->setChildren($parts);
+				$message->addPart($body, $contentType);
+			} else {
+				$message->setBody($body, $contentType);
+			}
+		} else {
+			$oldContentType = $message->getContentType();
+			if ($oldContentType == $contentType) {
+				$message->setBody($body, $contentType);
+			} else {
+				$message->setBody(null);
+				$message->setContentType(null);
+				$message->addPart($oldBody, $oldContentType);
+				$message->addPart($body, $contentType);
+			}
+		}
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function attach($fileName, array $options = [])
+	{
+		$attachment = \Swift_Attachment::fromPath($fileName);
+		if (!empty($options['fileName'])) {
+			$attachment->setFilename($options['fileName']);
+		}
+		if (!empty($options['contentType'])) {
+			$attachment->setContentType($options['contentType']);
+		}
+		$this->getSwiftMessage()->attach($attachment);
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function attachContent($content, array $options = [])
+	{
+		$attachment = \Swift_Attachment::newInstance($content);
+		if (!empty($options['fileName'])) {
+			$attachment->setFilename($options['fileName']);
+		}
+		if (!empty($options['contentType'])) {
+			$attachment->setContentType($options['contentType']);
+		}
+		$this->getSwiftMessage()->attach($attachment);
+		return $this;
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function embed($fileName, array $options = [])
+	{
+		$embedFile = \Swift_EmbeddedFile::fromPath($fileName);
+		if (!empty($options['fileName'])) {
+			$embedFile->setFilename($options['fileName']);
+		}
+		if (!empty($options['contentType'])) {
+			$embedFile->setContentType($options['contentType']);
+		}
+		return $this->getSwiftMessage()->embed($embedFile);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function embedContent($content, array $options = [])
+	{
+		$embedFile = \Swift_EmbeddedFile::newInstance($content);
+		if (!empty($options['fileName'])) {
+			$embedFile->setFilename($options['fileName']);
+		}
+		if (!empty($options['contentType'])) {
+			$embedFile->setContentType($options['contentType']);
+		}
+		return $this->getSwiftMessage()->embed($embedFile);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function toString()
+	{
+		return $this->getSwiftMessage()->toString();
+	}
+
+	/**
+	 * Creates the Swift email message instance.
+	 * @return \Swift_Message email message instance.
+	 */
+	protected function createSwiftMessage()
+	{
+		return new \Swift_Message();
+	}
+}
\ No newline at end of file

framework/yii/mail/BaseMailer.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\mail;
+
+use yii\base\Component;
+use yii\base\InvalidConfigException;
+use Yii;
+use yii\base\ViewContextInterface;
+
+/**
+ * BaseMailer provides the basic interface for the email mailer application component.
+ * It provides the default configuration for the email messages.
+ * Particular implementation of mailer should provide implementation for the [[send()]] method.
+ *
+ * @see BaseMessage
+ *
+ * @property \yii\base\View|array $view view instance or its array configuration.
+ *
+ * @author Paul Klimov <klimov.paul@gmail.com>
+ * @since 2.0
+ */
+abstract class BaseMailer extends Component implements MailerInterface, ViewContextInterface
+{
+	/**
+	 * @var \yii\base\View|array view instance or its array configuration.
+	 */
+	private $_view = [];
+	/**
+	 * @var string directory containing view files for this email messages.
+	 */
+	public $viewPath = '@app/mails';
+	/**
+	 * @var string HTML layout view name.
+	 */
+	public $htmlLayout = 'layouts/html';
+	/**
+	 * @var string text layout view name.
+	 */
+	public $textLayout = 'layouts/text';
+	/**
+	 * @var array configuration, which should be applied by default to any new created
+	 * email message instance.
+	 * In addition to normal [[Yii::createObject()]] behavior extra config keys are available:
+	 *  - 'charset' argument for [[MessageInterface::charset()]]
+	 *  - 'from' argument for [[MessageInterface::from()]]
+	 *  - 'to' argument for [[MessageInterface::to()]]
+	 *  - 'cc' argument for [[MessageInterface::cc()]]
+	 *  - 'bcc' argument for [[MessageInterface::bcc()]]
+	 *  - 'subject' argument for [[MessageInterface::subject()]]
+	 *  - 'textBody' argument for [[MessageInterface::textBody()]]
+	 *  - 'htmlBody' argument for [[MessageInterface::htmlBody()]]
+	 * For example:
+	 * ~~~
+	 * array(
+	 *     'charset' => 'UTF-8',
+	 *     'from' => 'noreply@mydomain.com',
+	 *     'bcc' => 'developer@mydomain.com',
+	 * )
+	 * ~~~
+	 */
+	public $messageConfig = [];
+	/**
+	 * @var string message default class name.
+	 */
+	public $messageClass = 'yii\mail\BaseMessage';
+
+	/**
+	 * @param array|\yii\base\View $view view instance or its array configuration.
+	 * @throws \yii\base\InvalidConfigException on invalid argument.
+	 */
+	public function setView($view)
+	{
+		if (!is_array($view) && !is_object($view)) {
+			throw new InvalidConfigException('"' . get_class($this) . '::view" should be either object or array, "' . gettype($view) . '" given.');
+		}
+		$this->_view = $view;
+	}
+
+	/**
+	 * @return \yii\base\View view instance.
+	 */
+	public function getView()
+	{
+		if (!is_object($this->_view)) {
+			$this->_view = $this->createView($this->_view);
+		}
+		return $this->_view;
+	}
+
+	/**
+	 * Creates view instance from given configuration.
+	 * @param array $config view configuration.
+	 * @return \yii\base\View view instance.
+	 */
+	protected function createView(array $config)
+	{
+		if (!array_key_exists('class', $config)) {
+			$config['class'] = 'yii\web\View';
+		}
+		return Yii::createObject($config);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function compose($view = null, array $params = [])
+	{
+		$message = $this->createMessage();
+		if ($view !== null) {
+			$params['message'] = $message;
+			if (is_array($view)) {
+				if (array_key_exists('html', $view)) {
+					$message->htmlBody($this->render($view['html'], $params, $this->htmlLayout));
+				}
+				if (array_key_exists('text', $view)) {
+					$message->textBody($this->render($view['text'], $params, $this->textLayout));
+				}
+			} else {
+				$html = $this->render($view, $params, $this->htmlLayout);
+				$message->htmlBody($html);
+				$message->textBody(strip_tags($html));
+			}
+		}
+		return $message;
+	}
+
+	/**
+	 * Creates mew message instance using configuration from [[messageConfig]].
+	 * If 'class' parameter is omitted, [[messageClass]] will be used.
+	 * @return MessageInterface message instance.
+	 */
+	protected function createMessage()
+	{
+		$config = $this->messageConfig;
+		if (!array_key_exists('class', $config)) {
+			$config['class'] = $this->messageClass;
+		}
+		$directSetterNames = [
+			'charset',
+			'from',
+			'to',
+			'cc',
+			'bcc',
+			'subject',
+			'textBody',
+			'htmlBody',
+		];
+		$directSetterConfig = [];
+		foreach ($config as $name => $value) {
+			if (in_array($name, $directSetterNames, true)) {
+				$directSetterConfig[$name] = $value;
+				unset($config[$name]);
+			}
+		}
+		$message = Yii::createObject($config);
+		foreach ($directSetterConfig as $name => $value) {
+			$message->$name($value);
+		}
+		return $message;
+	}
+
+	/**
+	 * Sends a couple of messages at once.
+	 * Note: some particular mailers may benefit from sending messages as batch,
+	 * saving resources, for example on open/close connection operations,
+	 * they may override this method to create their specific implementation.
+	 * @param array $messages list of email messages, which should be sent.
+	 * @return integer number of successful sends.
+	 */
+	public function sendMultiple(array $messages)
+	{
+		$successCount = 0;
+		foreach ($messages as $message) {
+			if ($this->send($message)) {
+				$successCount++;
+			}
+		}
+		return $successCount;
+	}
+
+	/**
+	 * Renders a view.
+	 * @param string $view the view name or the path alias of the view file.
+	 * @param array $params the parameters (name-value pairs) that will be extracted and made available in the view file.
+	 * @param string|boolean $layout layout view name, if false given no layout will be applied.
+	 * @return string the rendering result.
+	 */
+	public function render($view, $params = [], $layout = false)
+	{
+		$output = $this->getView()->render($view, $params, $this);
+		if ($layout !== false) {
+			return $this->getView()->render($layout, ['content' => $output], $this);
+		} else {
+			return $output;
+		}
+	}
+
+	/**
+	 * Finds the view file corresponding to the specified relative view name.
+	 * @param string $view a relative view name. The name does NOT start with a slash.
+	 * @return string the view file path. Note that the file may not exist.
+	 */
+	public function findViewFile($view)
+	{
+		return Yii::getAlias($this->viewPath) . DIRECTORY_SEPARATOR . $view;
+	}
+}
\ No newline at end of file

framework/yii/mail/BaseMessage.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\mail;
+
+use yii\base\InvalidParamException;
+use yii\base\Object;
+use yii\helpers\FileHelper;
+use Yii;
+
+/**
+ * BaseMessage represent the single email message.
+ * It functionality depends on application component 'email',
+ * which should provide the actual email sending functionality as well as
+ * default message configuration.
+ *
+ * @see BaseMailer
+ *
+ * @property \yii\mail\BaseMailer $mailer mailer component instance. This property is read-only.
+ *
+ * @author Paul Klimov <klimov.paul@gmail.com>
+ * @since 2.0
+ */
+abstract class BaseMessage extends Object implements MessageInterface
+{
+	/**
+	 * @return \yii\mail\BaseMailer mailer component instance.
+	 */
+	public function getMailer()
+	{
+		return Yii::$app->getComponent('mail');
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function send()
+	{
+		return $this->getMailer()->send($this);
+	}
+
+	/**
+	 * PHP magic method that returns the string representation of this object.
+	 * @return string the string representation of this object.
+	 */
+	public function __toString()
+	{
+		// __toString cannot throw exception
+		// use trigger_error to bypass this limitation
+		try {
+			return $this->toString();
+		} catch (\Exception $e) {
+			trigger_error($e->getMessage());
+			return '';
+		}
+	}
+}
\ No newline at end of file

framework/yii/mail/MailerInterface.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\mail;
+
+/**
+ * MailerInterface is an interface, which any mailer should apply.
+ * Mailer creates and sends messages. Also it allows composition of the message
+ * body via view rendering:
+ * ~~~php
+ * Yii::$app->mail->compose('contact/html', ['contactForm' => $form])
+ *     ->from('from@domain.com')
+ *     ->to($form->email)
+ *     ->subject($form->subject)
+ *     ->send();
+ * ~~~
+ *
+ * @see MessageInterface
+ *
+ * @author Paul Klimov <klimov.paul@gmail.com>
+ * @since 2.0
+ */
+interface MailerInterface
+{
+	/**
+	 * Creates new message optionally filling up its body via view rendering.
+	 * The view to be rendered can be specified in one of the following formats:
+	 * - path alias (e.g. "@app/mails/contact/body");
+	 * - relative path (e.g. "contact"): the actual view file will be resolved by [[\yii\base\ViewContextInterface]].
+	 * @param string|array $view view, which should be used to render message body
+	 *  - if string - the view name or the path alias of the HTML body view file, in this case
+	 * text body will be composed automatically from html one.
+	 *  - if array - list of views for each body type in format: ['html' => 'htmlView', 'text' => 'textView']
+	 * @param array $params the parameters (name-value pairs) that will be extracted and made available in the view file.
+	 * @return MessageInterface message instance.
+	 */
+	public function compose($view = null, array $params = []);
+
+	/**
+	 * Sends the given email message.
+	 * @param object $message email message instance
+	 * @return boolean whether the message has been sent.
+	 */
+	public function send($message);
+
+	/**
+	 * Sends a couple of messages at once.
+	 * Note: some particular mailers may benefit from sending messages as batch,
+	 * saving resources, for example on open/close connection operations.
+	 * @param array $messages list of email messages, which should be sent.
+	 * @return integer number of successful sends.
+	 */
+	public function sendMultiple(array $messages);
+}
\ No newline at end of file

framework/yii/mail/MessageInterface.php

+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\mail;
+
+/**
+ * MessageInterface is an interface, which email message should apply.
+ * Together with application component, which matches the [[MailerInterface]],
+ * it introduces following mail sending syntax:
+ * ~~~php
+ * Yii::$app->mail->compose()
+ *     ->from('from@domain.com')
+ *     ->to('to@domain.com')
+ *     ->subject('Message Subject')
+ *     ->textBody('Plain text content')
+ *     ->htmlBody('<b>HTML content</b>')
+ *     ->send();
+ * ~~~
+ *
+ * @see MailerInterface
+ *
+ * @author Paul Klimov <klimov.paul@gmail.com>
+ * @since 2.0
+ */
+interface MessageInterface
+{
+	/**
+	 * Set the character set of this message.
+	 * @param string $charset character set name.
+	 * @return static self reference.
+	 */
+	public function charset($charset);
+
+	/**
+	 * Sets message sender.
+	 * @param string|array $from sender email address.
+	 * You may pass an array of addresses if this message is from multiple people.
+	 * You may also specify sender name in addition to email address using format:
+	 * [email => name].
+	 * @return static self reference.
+	 */
+	public function from($from);
+
+	/**
+	 * Sets message receiver.
+	 * @param string|array $to receiver email address.
+	 * You may pass an array of addresses if multiple recipients should receive this message.
+	 * You may also specify receiver name in addition to email address using format:
+	 * [email => name].
+	 * @return static self reference.
+	 */
+	public function to($to);
+
+	/**
+	 * Set the Cc (additional copy receiver) addresses of this message.
+	 * @param string|array $cc copy receiver email address.
+	 * You may pass an array of addresses if multiple recipients should receive this message.
+	 * You may also specify receiver name in addition to email address using format:
+	 * [email => name].
+	 * @return static self reference.
+	 */
+	public function cc($cc);
+
+	/**
+	 * Set the Bcc (hidden copy receiver) addresses of this message.
+	 * @param string|array $bcc hidden copy receiver email address.
+	 * You may pass an array of addresses if multiple recipients should receive this message.
+	 * You may also specify receiver name in addition to email address using format:
+	 * [email => name].
+	 * @return static self reference.
+	 */
+	public function bcc($bcc);
+
+	/**
+	 * Sets message subject.
+	 * @param string $subject message subject
+	 * @return static self reference.
+	 */
+	public function subject($subject);
+
+	/**
+	 * Sets message plain text content.
+	 * @param string $text message plain text content.
+	 * @return static self reference.
+	 */
+	public function textBody($text);
+
+	/**
+	 * Sets message HTML content.
+	 * @param string $html message HTML content.
+	 * @return static self reference.
+	 */
+	public function htmlBody($html);
+
+	/**
+	 * Attaches existing file to the email message.
+	 * @param string $fileName full file name
+	 * @param array $options options for embed file. Valid options are:
+	 * - fileName: name, which should be used to attach file.
+	 * - contentType: attached file MIME type.
+	 * @return static self reference.
+	 */
+	public function attach($fileName, array $options = []);
+
+	/**
+	 * Attach specified content as file for the email message.
+	 * @param string $content attachment file content.
+	 * @param array $options options for embed file. Valid options are:
+	 * - fileName: name, which should be used to attach file.
+	 * - contentType: attached file MIME type.
+	 * @return static self reference.
+	 */
+	public function attachContent($content, array $options = []);
+
+	/**
+	 * Attach a file and return it's CID source.
+	 * This method should be used when embedding images or other data in a message.
+	 * @param string $fileName file name.
+	 * @param array $options options for embed file. Valid options are:
+	 * - fileName: name, which should be used to attach file.
+	 * - contentType: attached file MIME type.
+	 * @return string attachment CID.
+	 */
+	public function embed($fileName, array $options = []);
+
+	/**
+	 * Attach a content as file and return it's CID source.
+	 * This method should be used when embedding images or other data in a message.
+	 * @param string $content  attachment file content.
+	 * @param array $options options for embed file. Valid options are:
+	 * - fileName: name, which should be used to attach file.
+	 * - contentType: attached file MIME type.
+	 * @return string attachment CID.
+	 */
+	public function embedContent($content, array $options = []);
+
+	/**
+	 * Sends this email message.
+	 * @return boolean success.
+	 */
+	public function send();
+
+	/**
+	 * Returns string representation of this message.
+	 * @return string the string representation of this message.
+	 */
+	public function toString();
+}
\ No newline at end of file

tests/unit/VendorTestCase.php

+<?php
+
+namespace yiiunit;
+
+use yii\base\NotSupportedException;
+use Yii;
+
+/**
+ * This is the base class for all yii framework unit tests, which requires
+ * external vendor libraries to function.
+ */
+class VendorTestCase extends TestCase
+{
+	/**
+	 * This method is called before the first test of this test class is run.
+	 * Attempts to load vendor autoloader.
+	 * @throws \yii\base\NotSupportedException
+	 */
+	public static function setUpBeforeClass()
+	{
+		$vendorDir = __DIR__ . '/vendor';
+		Yii::setAlias('@vendor', $vendorDir);
+		$vendorAutoload = $vendorDir . '/autoload.php';
+		if (file_exists($vendorAutoload)) {
+			require_once($vendorAutoload);
+		} else {
+			throw new NotSupportedException("Vendor autoload file '{$vendorAutoload}' is missing.");
+		}
+	}
+}
\ No newline at end of file

tests/unit/extensions/swiftmailer/MailerTest.php

+<?php
+
+namespace yiiunit\extensions\swiftmailer;
+
+use Yii;
+use yii\swiftmailer\Mailer;
+use yii\swiftmailer\Message;
+use yiiunit\VendorTestCase;
+
+/**
+ * @group vendor
+ * @group mail
+ * @group swiftmailer
+ */
+class MailerTest extends VendorTestCase
+{
+	public function setUp()
+	{
+		$this->mockApplication([
+			'components' => [
+				'email' => $this->createTestEmailComponent()
+			]
+		]);
+	}
+
+	/**
+	 * @return Mailer test email component instance.
+	 */
+	protected function createTestEmailComponent()
+	{
+		$component = new Mailer();
+		return $component;
+	}
+
+	// Tests :
+
+	public function testSetupTransport()
+	{
+		$mailer = new Mailer();
+
+		$transport = \Swift_MailTransport::newInstance();
+		$mailer->setTransport($transport);
+		$this->assertEquals($transport, $mailer->getTransport(), 'Unable to setup transport!');
+	}
+
+	/**
+	 * @depends testSetupTransport
+	 */
+	public function testConfigureTransport()
+	{
+		$mailer = new Mailer();
+
+		$transportConfig = [
+			'class' => 'Swift_SmtpTransport',
+			'host' => 'localhost',
+		];
+		$mailer->setTransport($transportConfig);
+		$transport = $mailer->getTransport();
+		$this->assertTrue(is_object($transport), 'Unable to setup transport via config!');
+		$this->assertEquals($transportConfig['class'], get_class($transport), 'Invalid transport class!');
+		$this->assertEquals($transportConfig['host'], $transport->getHost(), 'Invalid transport host!');
+	}
+
+	public function testGetSwiftMailer()
+	{
+		$mailer = new Mailer();
+		$this->assertTrue(is_object($mailer->getSwiftMailer()), 'Unable to get Swift mailer instance!');
+	}
+}
\ No newline at end of file

tests/unit/extensions/swiftmailer/MessageTest.php

+<?php
+
+namespace yiiunit\extensions\swiftmailer;
+
+use Yii;
+use yii\helpers\FileHelper;
+use yii\swiftmailer\Mailer;
+use yii\swiftmailer\Message;
+use yiiunit\VendorTestCase;
+
+/**
+ * @group vendor
+ * @group mail
+ * @group swiftmailer
+ */
+class MessageTest extends VendorTestCase
+{
+	/**
+	 * @var string test email address, which will be used as receiver for the messages.
+	 */
+	protected $testEmailReceiver = 'someuser@somedomain.com';
+
+	public function setUp()
+	{
+		$this->mockApplication([
+			'components' => [
+				'mail' => $this->createTestEmailComponent()
+			]
+		]);
+		$filePath = $this->getTestFilePath();
+		if (!file_exists($filePath)) {
+			FileHelper::createDirectory($filePath);
+		}
+	}
+
+	public function tearDown()
+	{
+		$filePath = $this->getTestFilePath();
+		if (file_exists($filePath)) {
+			FileHelper::removeDirectory($filePath);
+		}
+	}
+
+	/**
+	 * @return string test file path.
+	 */
+	protected function getTestFilePath()
+	{
+		return Yii::getAlias('@yiiunit/runtime') . DIRECTORY_SEPARATOR . basename(get_class($this)) . '_' . getmypid();
+	}
+
+	/**
+	 * @return Mailer test email component instance.
+	 */
+	protected function createTestEmailComponent()
+	{
+		$component = new Mailer();
+		return $component;
+	}
+
+	/**
+	 * @return Message test message instance.
+	 */
+	protected function createTestMessage()
+	{
+		return Yii::$app->getComponent('mail')->compose();
+	}
+
+	/**
+	 * Creates image file with given text.
+	 * @param string $fileName file name.
+	 * @param string $text text to be applied on image.
+	 * @return string image file full name.
+	 */
+	protected function createImageFile($fileName = 'test.jpg', $text = 'Test Image')
+	{
+		if (!function_exists('imagecreatetruecolor')) {
+			$this->markTestSkipped('GD lib required.');
+		}
+		$fileFullName = $this->getTestFilePath() . DIRECTORY_SEPARATOR . $fileName;
+		$image = imagecreatetruecolor(120, 20);
+		$textColor = imagecolorallocate($image, 233, 14, 91);
+		imagestring($image, 1, 5, 5, $text, $textColor);
+		imagejpeg($image, $fileFullName);
+		imagedestroy($image);
+		return $fileFullName;
+	}
+
+	/**
+	 * Finds the attachment object in the message.
+	 * @param Message $message message instance
+	 * @return null|\Swift_Mime_Attachment attachment instance.
+	 */
+	protected function getAttachment(Message $message)
+	{
+		$messageParts = $message->getSwiftMessage()->getChildren();
+		$attachment = null;
+		foreach ($messageParts as $part) {
+			if ($part instanceof \Swift_Mime_Attachment) {
+				$attachment = $part;
+				break;
+			}
+		}
+		return $attachment;
+	}
+
+	// Tests :
+
+	public function testGetSwiftMessage()
+	{
+		$message = new Message();
+		$this->assertTrue(is_object($message->getSwiftMessage()), 'Unable to get Swift message!');
+	}
+
+	/**
+	 * @depends testGetSwiftMessage
+	 */
+	public function testSetupHeaders()
+	{
+		$charset = 'utf-16';
+		$subject = 'Test Subject';
+		$to = 'someuser@somedomain.com';
+		$cc = 'ccuser@somedomain.com';
+		$bcc = 'bccuser@somedomain.com';
+
+		$messageString = $this->createTestMessage()
+			->charset($charset)
+			->subject($subject)
+			->to($to)
+			->cc($cc)
+			->bcc($bcc)
+			->toString();
+
+		$this->assertContains('charset=' . $charset, $messageString, 'Incorrect charset!');
+		$this->assertContains('Subject: ' . $subject, $messageString, 'Incorrect "Subject" header!');
+		$this->assertContains('To: ' . $to, $messageString, 'Incorrect "To" header!');
+		$this->assertContains('Cc: ' . $cc, $messageString, 'Incorrect "Cc" header!');
+		$this->assertContains('Bcc: ' . $bcc, $messageString, 'Incorrect "Bcc" header!');
+	}
+
+	/**
+	 * @depends testGetSwiftMessage
+	 */
+	public function testSetupFrom()
+	{
+		$from = 'someuser@somedomain.com';
+		$messageString = $this->createTestMessage()
+			->from($from)
+			->toString();
+		$this->assertContains('From: ' . $from, $messageString, 'Incorrect "From" header!');
+		$this->assertContains('Reply-To: ' . $from, $messageString, 'Incorrect "Reply-To" header!');
+	}
+
+	/**
+	 * @depends testGetSwiftMessage
+	 */
+	public function testSend()
+	{
+		$message = $this->createTestMessage();
+		$message->to($this->testEmailReceiver);
+		$message->from('someuser@somedomain.com');
+		$message->subject('Yii Swift Test');
+		$message->textBody('Yii Swift Test body');
+		$this->assertTrue($message->send());
+	}
+
+	/**
+	 * @depends testSend
+	 */
+	public function testAttachFile()
+	{
+		$message = $this->createTestMessage();
+
+		$message->to($this->testEmailReceiver);
+		$message->from('someuser@somedomain.com');
+		$message->subject('Yii Swift Attach File Test');
+		$message->textBody('Yii Swift Attach File Test body');
+		$fileName = __FILE__;
+		$message->attach($fileName);
+
+		$this->assertTrue($message->send());
+
+		$attachment = $this->getAttachment($message);
+		$this->assertTrue(is_object($attachment), 'No attachment found!');
+		$this->assertContains($attachment->getFilename(), $fileName, 'Invalid file name!');
+	}
+
+	/**
+	 * @depends testSend
+	 */
+	public function testAttachContent()
+	{
+		$message = $this->createTestMessage();
+
+		$message->to($this->testEmailReceiver);
+		$message->from('someuser@somedomain.com');
+		$message->subject('Yii Swift Create Attachment Test');
+		$message->textBody('Yii Swift Create Attachment Test body');
+		$fileName = 'test.txt';
+		$fileContent = 'Test attachment content';
+		$message->attachContent($fileContent, ['fileName' => $fileName]);
+
+		$this->assertTrue($message->send());
+
+		$attachment = $this->getAttachment($message);
+		$this->assertTrue(is_object($attachment), 'No attachment found!');
+		$this->assertEquals($fileName, $attachment->getFilename(), 'Invalid file name!');
+	}
+
+	/**
+	 * @depends testSend
+	 */
+	public function testEmbedFile()
+	{
+		$fileName = $this->createImageFile('embed_file.jpg', 'Embed Image File');
+
+		$message = $this->createTestMessage();
+
+		$cid = $message->embed($fileName);
+
+		$message->to($this->testEmailReceiver);
+		$message->from('someuser@somedomain.com');
+		$message->subject('Yii Swift Embed File Test');
+		$message->htmlBody('Embed image: <img src="' . $cid. '" alt="pic">');
+
+		$this->assertTrue($message->send());
+
+		$attachment = $this->getAttachment($message);
+		$this->assertTrue(is_object($attachment), 'No attachment found!');
+		$this->assertContains($attachment->getFilename(), $fileName, 'Invalid file name!');
+	}
+
+	/**
+	 * @depends testSend
+	 */
+	public function testEmbedContent()
+	{
+		$fileFullName = $this->createImageFile('embed_file.jpg', 'Embed Image File');
+		$message = $this->createTestMessage();
+
+		$fileName = basename($fileFullName);
+		$contentType = 'image/jpeg';
+		$fileContent = file_get_contents($fileFullName);
+
+		$cid = $message->embedContent($fileContent, ['fileName' => $fileName, 'contentType' => $contentType]);
+
+		$message->to($this->testEmailReceiver);
+		$message->from('someuser@somedomain.com');
+		$message->subject('Yii Swift Embed File Test');
+		$message->htmlBody('Embed image: <img src="' . $cid. '" alt="pic">');
+
+		$this->assertTrue($message->send());
+
+		$attachment = $this->getAttachment($message);
+		$this->assertTrue(is_object($attachment), 'No attachment found!');
+		$this->assertEquals($fileName, $attachment->getFilename(), 'Invalid file name!');
+		$this->assertEquals($contentType, $attachment->getContentType(), 'Invalid content type!');
+	}
+
+	/**
+	 * @depends testSend
+	 */
+	public function testSendAlternativeBody()
+	{
+		$message = $this->createTestMessage();
+
+		$message->to($this->testEmailReceiver);
+		$message->from('someuser@somedomain.com');
+		$message->subject('Yii Swift Alternative Body Test');
+		$message->htmlBody('<b>Yii Swift</b> test HTML body');
+		$message->textBody('Yii Swift test plain text body');
+
+		$this->assertTrue($message->send());
+
+		$messageParts = $message->getSwiftMessage()->getChildren();
+		$textPresent = false;
+		$htmlPresent = false;
+		foreach ($messageParts as $part) {
+			if (!($part instanceof \Swift_Mime_Attachment)) {
+				/* @var $part \Swift_Mime_MimePart */
+				if ($part->getContentType() == 'text/plain') {
+					$textPresent = true;
+				}
+				if ($part->getContentType() == 'text/html') {
+					$htmlPresent = true;
+				}
+			}
+		}
+		$this->assertTrue($textPresent, 'No text!');
+		$this->assertTrue($htmlPresent, 'No HTML!');
+	}
+
+	/**
+	 * @depends testGetSwiftMessage
+	 */
+	public function testSerialize()
+	{
+		$message = $this->createTestMessage();
+
+		$message->to($this->testEmailReceiver);
+		$message->from('someuser@somedomain.com');
+		$message->subject('Yii Swift Alternative Body Test');
+		$message->textBody('Yii Swift test plain text body');
+
+		$serializedMessage = serialize($message);
+		$this->assertNotEmpty($serializedMessage, 'Unable to serialize message!');
+
+		$unserializedMessaage = unserialize($serializedMessage);
+		$this->assertEquals($message, $unserializedMessaage, 'Unable to unserialize message!');
+	}
+}
\ No newline at end of file

tests/unit/framework/mail/BaseMailerTest.php

+<?php
+
+namespace yiiunit\framework\mail;
+
+use Yii;
+use yii\base\View;
+use yii\mail\BaseMailer;
+use yii\mail\BaseMessage;
+use yii\helpers\FileHelper;
+use yiiunit\TestCase;
+
+/**
+ * @group mail
+ */
+class BaseMailerTest extends TestCase
+{
+	public function setUp()
+	{
+		$this->mockApplication([
+			'components' => [
+				'mail' => $this->createTestMailComponent(),
+			]
+		]);
+		$filePath = $this->getTestFilePath();
+		if (!file_exists($filePath)) {
+			FileHelper::createDirectory($filePath);
+		}
+	}
+
+	public function tearDown()
+	{
+		$filePath = $this->getTestFilePath();
+		if (file_exists($filePath)) {
+			FileHelper::removeDirectory($filePath);
+		}
+	}
+
+	/**
+	 * @return string test file path.
+	 */
+	protected function getTestFilePath()
+	{
+		return Yii::getAlias('@yiiunit/runtime') . DIRECTORY_SEPARATOR . basename(get_class($this)) . '_' . getmypid();
+	}
+
+	/**
+	 * @return Mailer test email component instance.
+	 */
+	protected function createTestMailComponent()
+	{
+		$component = new Mailer();
+		$component->viewPath = $this->getTestFilePath();
+		return $component;
+	}
+
+	/**
+	 * @return Mailer mailer instance
+	 */
+	protected function getTestMailComponent()
+	{
+		return Yii::$app->getComponent('mail');
+	}
+
+	// Tests :
+
+	public function testSetupView()
+	{
+		$mailer = new Mailer();
+
+		$view = new View();
+		$mailer->setView($view);
+		$this->assertEquals($view, $mailer->getView(), 'Unable to setup view!');
+
+		$viewConfig = [
+			'params' => [
+				'param1' => 'value1',
+				'param2' => 'value2',
+			]
+		];
+		$mailer->setView($viewConfig);
+		$view = $mailer->getView();
+		$this->assertTrue(is_object($view), 'Unable to setup view via config!');
+		$this->assertEquals($viewConfig['params'], $view->params, 'Unable to configure view via config array!');
+	}
+
+	/**
+	 * @depends testSetupView
+	 */
+	public function testGetDefaultView()
+	{
+		$mailer = new Mailer();
+		$view = $mailer->getView();
+		$this->assertTrue(is_object($view), 'Unable to get default view!');
+	}
+
+	public function testCreateMessage()
+	{
+		$mailer = new Mailer();
+		$message = $mailer->compose();
+		$this->assertTrue(is_object($message), 'Unable to create message instance!');
+		$this->assertEquals($mailer->messageClass, get_class($message), 'Invalid message class!');
+	}
+
+	/**
+	 * @depends testCreateMessage
+	 */
+	public function testDefaultMessageConfig()
+	{
+		$mailer = new Mailer();
+
+		$notPropertyConfig = [
+			'charset' => 'utf-16',
+			'from' => 'from@domain.com',
+			'to' => 'to@domain.com',
+			'cc' => 'cc@domain.com',
+			'bcc' => 'bcc@domain.com',
+			'subject' => 'Test subject',
+			'textBody' => 'Test text body',
+			'htmlBody' => 'Test HTML body',
+		];
+		$propertyConfig = [
+			'id' => 'test-id',
+			'encoding' => 'test-encoding',
+		];
+		$messageConfig = array_merge($notPropertyConfig, $propertyConfig);
+		$mailer->messageConfig = $messageConfig;
+
+		$message = $mailer->compose();
+
+		foreach ($notPropertyConfig as $name => $value) {
+			$this->assertEquals($value, $message->{'_' . $name});
+		}
+		foreach ($propertyConfig as $name => $value) {
+			$this->assertEquals($value, $message->$name);
+		}
+	}
+
+	/**
+	 * @depends testGetDefaultView
+	 */
+	public function testRender()
+	{
+		$mailer = $this->getTestMailComponent();
+
+		$viewName = 'test_view';
+		$viewFileName = $this->getTestFilePath() . DIRECTORY_SEPARATOR . $viewName . '.php';
+		$viewFileContent = '<?php echo $testParam; ?>';
+		file_put_contents($viewFileName, $viewFileContent);
+
+		$params = [
+			'testParam' => 'test output'
+		];
+		$renderResult = $mailer->render($viewName, $params);
+		$this->assertEquals($params['testParam'], $renderResult);
+	}
+
+	/**
+	 * @depends testRender
+	 */
+	public function testRenderLayout()
+	{
+		$mailer = $this->getTestMailComponent();
+
+		$filePath = $this->getTestFilePath();
+
+		$viewName = 'test_view';
+		$viewFileName = $filePath . DIRECTORY_SEPARATOR . $viewName . '.php';
+		$viewFileContent = 'view file content';
+		file_put_contents($viewFileName, $viewFileContent);
+
+		$layoutName = 'test_layout';
+		$layoutFileName = $filePath . DIRECTORY_SEPARATOR . $layoutName . '.php';
+		$layoutFileContent = 'Begin Layout <?php echo $content; ?> End Layout';
+		file_put_contents($layoutFileName, $layoutFileContent);
+
+		$renderResult = $mailer->render($viewName, [], $layoutName);
+		$this->assertEquals('Begin Layout ' . $viewFileContent . ' End Layout', $renderResult);
+	}
+
+	/**
+	 * @depends testCreateMessage
+	 * @depends testRender
+	 */
+	public function testCompose()
+	{
+		$mailer = $this->getTestMailComponent();
+		$mailer->htmlLayout = false;
+		$mailer->textLayout = false;
+
+		$htmlViewName = 'test_html_view';
+		$htmlViewFileName = $this->getTestFilePath() . DIRECTORY_SEPARATOR . $htmlViewName . '.php';
+		$htmlViewFileContent = 'HTML <b>view file</b> content';
+		file_put_contents($htmlViewFileName, $htmlViewFileContent);
+		
+		$textViewName = 'test_text_view';
+		$textViewFileName = $this->getTestFilePath() . DIRECTORY_SEPARATOR . $textViewName . '.php';
+		$textViewFileContent = 'Plain text view file content';
+		file_put_contents($textViewFileName, $textViewFileContent);
+
+		$message = $mailer->compose([
+			'html' => $htmlViewName,
+			'text' => $textViewName,
+		]);
+		$this->assertEquals($htmlViewFileContent, $message->_htmlBody, 'Unable to render html!');
+		$this->assertEquals($textViewFileContent, $message->_textBody, 'Unable to render text!');
+
+		$message = $mailer->compose($htmlViewName);
+		$this->assertEquals($htmlViewFileContent, $message->_htmlBody, 'Unable to render html by direct view!');
+		$this->assertEquals(strip_tags($htmlViewFileContent), $message->_textBody, 'Unable to render text by direct view!');
+	}
+}
+
+/**
+ * Test Mailer class
+ */
+class Mailer extends BaseMailer
+{
+	public $messageClass = 'yiiunit\framework\mail\Message';
+	public $sentMessages = [];
+
+	public function send($message)
+	{
+		$this->sentMessages[] = $message;
+	}
+}
+
+/**
+ * Test Message class
+ */
+class Message extends BaseMessage
+{
+	public $id;
+	public $encoding;
+	public $_charset;
+	public $_from;
+	public $_to;
+	public $_cc;
+	public $_bcc;
+	public $_subject;
+	public $_textBody;
+	public $_htmlBody;
+
+	public function charset($charset)
+	{
+		$this->_charset = $charset;
+		return $this;
+	}
+
+	public function from($from)
+	{
+		$this->_from = $from;
+		return $this;
+	}
+
+	public function to($to)
+	{
+		$this->_to = $to;
+		return $this;
+	}
+
+	public function cc($cc)
+	{
+		$this->_cc = $cc;
+		return $this;
+	}
+
+	public function bcc($bcc)
+	{
+		$this->_bcc = $bcc;
+		return $this;
+	}
+
+	public function subject($subject)
+	{
+		$this->_subject = $subject;
+		return $this;
+	}
+
+	public function textBody($text)
+	{
+		$this->_textBody = $text;
+		return $this;
+	}
+
+	public function htmlBody($html)
+	{
+		$this->_htmlBody = $html;
+		return $this;
+	}
+
+	public function attachContent($content, array $options = []) {}
+
+	public function attach($fileName, array $options = []) {}
+
+	public function embed($fileName, array $options = []) {}
+
+	public function embedContent($content, array $options = []) {}
+
+	public function toString()
+	{
+		return get_class($this);
+	}
+}
\ No newline at end of file

tests/unit/framework/mail/BaseMessageTest.php

+<?php
+
+namespace yiiunit\framework\mail;
+
+use Yii;
+use yii\mail\BaseMailer;
+use yii\mail\BaseMessage;
+use yiiunit\TestCase;
+
+/**
+ * @group mail
+ */
+class BaseMessageTest extends TestCase
+{
+	public function setUp()
+	{
+		$this->mockApplication([
+			'components' => [
+				'mail' => $this->createTestEmailComponent()
+			]
+		]);
+	}
+
+	/**
+	 * @return Mailer test email component instance.
+	 */
+	protected function createTestEmailComponent()
+	{
+		$component = new TestMailer();
+		return $component;
+	}
+
+	/**
+	 * @return TestMailer mailer instance.
+	 */
+	protected function getMailer()
+	{
+		return Yii::$app->getComponent('mail');
+	}
+
+	// Tests :
+
+	public function testGetMailer()
+	{
+		$mailer = $this->getMailer();
+		$message = $mailer->compose();
+		$this->assertEquals($mailer, $message->getMailer());
+	}
+
+	public function testSend()
+	{
+		$mailer = $this->getMailer();
+		$message = $mailer->compose();
+		$message->send();
+		$this->assertEquals($message, $mailer->sentMessages[0], 'Unable to send message!');
+	}
+
+	public function testToString()
+	{
+		$mailer = $this->getMailer();
+		$message = $mailer->compose();
+		$this->assertEquals($message->toString(), '' . $message);
+	}
+}
+
+/**
+ * Test Mailer class
+ */
+class TestMailer extends BaseMailer
+{
+	public $messageClass = 'yiiunit\framework\mail\TestMessage';
+	public $sentMessages = array();
+
+	public function send($message)
+	{
+		$this->sentMessages[] = $message;
+	}
+}
+
+/**
+ * Test Message class
+ */
+class TestMessage extends BaseMessage
+{
+	public $text;
+	public $html;
+
+	public function charset($charset) {}
+
+	public function from($from) {}
+
+	public function to($to) {}
+
+	public function cc($cc) {}
+
+	public function bcc($bcc) {}
+
+	public function subject($subject) {}
+
+	public function textBody($text) {
+		$this->text = $text;
+	}
+
+	public function htmlBody($html) {
+		$this->html = $html;
+	}
+
+	public function attachContent($content, array $options = []) {}
+
+	public function attach($fileName, array $options = []) {}
+
+	public function embed($fileName, array $options = []) {}
+
+	public function embedContent($content, array $options = []) {}
+
+	public function toString()
+	{
+		return get_class($this);
+	}
+}
\ No newline at end of file