public function testExceptionRefreshTokenExpired()
{
$parameters = ['grant_type' => 'refresh_token', 'refresh_token' => '5ff43cbc27b54202c6fd8bb9c2a308ce', 'scope' => 'demoscope1'];
$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(400, $client->getResponse()->getStatusCode());
$this->assertNotNull(json_decode($client->getResponse()->getContent()));
$tokenResponse = json_decode($client->getResponse()->getContent(), true);
$this->assertSame('invalid_grant', $tokenResponse['error']);
}