public function testMerge()
{
$message = new Message('foo');
$message->setDesc('foo');
$message->setMeaning('foo');
$message->addSource($s1 = $this->getMock('JMS\\TranslationBundle\\Model\\SourceInterface'));
$message2 = new Message('foo');
$message2->setDesc('bar');
$message2->addSource($s2 = $this->getMock('JMS\\TranslationBundle\\Model\\SourceInterface'));
$message->merge($message2);
$this->assertEquals('bar', $message->getDesc());
$this->assertEquals('foo', $message->getMeaning());
$this->assertSame(array($s1, $s2), $message->getSources());
}