public function testView()
{
$crawler = $this->client->request('POST', $this->app->url('admin_order_mail_view'), array('id' => $this->MailHistories[0]->getId()), array(), array('HTTP_X-Requested-With' => 'XMLHttpRequest', 'CONTENT_TYPE' => 'application/json'));
$this->assertTrue($this->client->getResponse()->isSuccessful());
}