public function testDelete()
{
$filepath = $this->app['config']['user_data_realdir'] . '/aaa.html';
$contents = '<html><body><h1>test</h1></body></html>';
file_put_contents($filepath, $contents);
$this->client->request('DELETE', $this->app->path('admin_content_file_delete') . '?select_file=' . $filepath);
$this->assertTrue($this->client->getResponse()->isRedirect($this->app->url('admin_content_file')));
$this->assertFalse(file_exists($filepath));
}