public function testSubmitEmpty()
{
$formData = $this->createFormData();
$formData['admin_allow_host'] = null;
$formData['force_ssl'] = null;
$formData['admin_route_dir'] = $this->app['config']['admin_route'];
$this->client->request('POST', $this->app->url('admin_setting_system_security'), array('admin_security' => $formData));
$this->assertTrue($this->client->getResponse()->isSuccessful());
$config = Yaml::parse(file_get_contents($this->configFile));
$this->assertNull($config['admin_allow_host']);
}