public function testGoodClientCred()
{
$parameters = ['grant_type' => 'client_credentials', 'scope' => 'demoscope1 demoscope2 demoscope3'];
$server = ['PHP_AUTH_USER' => 'http://democlient1.com/', 'PHP_AUTH_PW' => 'demosecret1'];
$client = $this->createClient();
$crawler = $client->request('POST', '/api/oauth2/token', $parameters, [], $server);
$this->assertSame(200, $client->getResponse()->getStatusCode());
$this->assertNotNull(json_decode($client->getResponse()->getContent()));
}