/**
  * @param string $serverAlias
  *
  * @return ServerInterface
  */
 private function guessServer($serverAlias)
 {
     if (self::USE_DEFAULT_KEY == $serverAlias) {
         return $this->serverRegistry->getDefault();
     } elseif ($this->container->has($serverAlias)) {
         return $this->container->get($serverAlias);
     } else {
         return $this->serverRegistry->get($serverAlias);
     }
 }
 /**
  * @expectedException \InvalidArgumentException
  * @expectedExceptionCode 1
  */
 public function testGetNotExistingService()
 {
     $reg = new ServerRegistry();
     $reg->get('foo');
 }