@Override
 protected CheckstyleWarning mapToWarning(final CheckStyleError violation) {
   CheckstyleWarning warning = new CheckstyleWarning();
   warning.setMessage(violation.getMessage());
   warning.setSeverity(violation.getSeverity());
   return warning;
 }
  protected CheckstyleWarning expectedWarning(
      String path, int lineNumber, String message, String severity) {
    final Source bSource = new Source();
    bSource.setSourceLineNumber(lineNumber);
    bSource.setSourceFilePath(path);
    bSource.setSourceCommit(commit);

    final CheckstyleWarning b = new CheckstyleWarning();
    b.setCommit(commit);
    b.setSource(bSource);
    b.setSeverity(severity);
    b.setMessage(message);
    return b;
  }