code: protected function initCompilationDirectory()
      {
          $fileStorage = \tao_models_classes_service_FileStorage::singleton();
          $directoryIds = explode('|', $this->getTestCompilationUri());
          $directories = array(
              'private' => $fileStorage->getDirectoryById($directoryIds[0]),
              'public' => $fileStorage->getDirectoryById($directoryIds[1])
          );
  
          $this->compilationDirectory = $directories;
      }
docs: Extracts the path of the compilation directory