Added support for cloning `Message`

CHANGELOG.md

@@ -4,6 +4,7 @@ Yii Framework 2 swiftmailer extension Change Log
 2.0.7 under development
 -----------------------
 
+- Bug #46: Fixed `yii\swiftmailer\Message` does not clones `$swiftMessage` during its own cloning (evpav, klimov-paul)
 - Enh #37: `yii\swiftmailer\Logger` now chooses logging level depending on incoming entry format (klimov-paul)
 - Enh #40: Added `yii\swiftmailer\Message::setHeaders()` allowing to setup custom headers in batch (klimov-paul)
 

Message.php

@@ -46,6 +46,18 @@ class Message extends BaseMessage
 
 
     /**
+     * This method is called after the object is created by cloning an existing one.
+     * It ensures [[swiftMessage]] is also cloned.
+     * @since 2.0.7
+     */
+    public function __clone()
+    {
+        if (is_object($this->_swiftMessage)) {
+            $this->_swiftMessage = clone $this->_swiftMessage;
+        }
+    }
+
+    /**
      * @return \Swift_Message Swift message instance.
      */
     public function getSwiftMessage()

tests/MessageTest.php

@@ -174,6 +174,25 @@ class MessageTest extends TestCase
     }
 
     /**
+     * @depends testSetGet
+     */
+    public function testClone()
+    {
+        $m1 = new Message();
+        $m1->setFrom('user@example.com');
+        $m2 = clone $m1;
+        $m1->setTo(['user1@example.com' => 'user1']);
+        $m2->setTo(['user2@example.com' => 'user2']);
+
+        $this->assertEquals(['user1@example.com' => 'user1'], $m1->getTo());
+        $this->assertEquals(['user2@example.com' => 'user2'], $m2->getTo());
+
+        $messageWithoutSwiftInitialized = new Message();
+        $m2 = clone $messageWithoutSwiftInitialized; // should be no error during cloning
+        $this->assertTrue($m2 instanceof Message);
+    }
+
+    /**
      * @depends testGetSwiftMessage
      */
     public function testSetupHeaderShortcuts()