public function testisWritable()
{
$message = new XliffMessage('foo');
$this->assertTrue($message->isWritable());
$this->assertSame($message, $message->setState(XliffMessage::STATE_FINAL));
$this->assertFalse($message->isWritable());
$this->assertSame($message, $message->setState(XliffMessage::STATE_NONE));
$this->assertTrue($message->isWritable());
$this->assertSame($message, $message->setState(XliffMessage::STATE_TRANSLATED));
$this->assertFalse($message->isWritable());
$this->assertSame($message, $message->setState(XliffMessage::STATE_NEW));
$this->assertTrue($message->isWritable());
}