public function testSessionStatsShouldThrowAnExceptionWithAnInvalidSessionId()
 {
     $requestBody = '{"method":"session-stats"}';
     $invalidSessionId = uniqid();
     $this->sendRequest($requestBody, $invalidSessionId)->andThrow($this->generateCSRFException());
     try {
         $this->rpcClient->sessionStats($invalidSessionId);
     } catch (CSRFException $e) {
         $this->assertSame($this->sessionId, $e->getSessionId());
     }
 }