Construct unique safe filenames in TestNG

Posted: October 22nd, 2009 | Author: Dave | Filed under: Examples | Tags: , , | No Comments »

In order to save files for investigating failures from within TestNG it’s important to have a safe filename that is unique to the test – otherwise you may overwrite important files. I have written the following simple method in Java that is called from a listener with an ITestResult parameter to construct a unique file name that should be safe on most file systems.

1
2
3
4
5
6
7
8
9
10
11
12
13
14

private static String fileNameFrom(ITestResult result, String fileExtension) {
  List<String> parts = new ArrayList<String>();
  parts.add(result.getTestClass().getName());
  parts.add(result.getMethod().getMethodName());
 
  //add parameters
  Object[] parameters = result.getParameters();
  for (Object parameter: parameters)
    parts.add(parameter != null ? parameter.toString() : NULL_PARAMETER_VALUE);
 
  String fileName = StringUtils.join(parts.toArray(new String[parts.size()]), ".");
  fileName = fileName.replaceAll("[\\^\\\\.\\-:;#_]", "_");
  return fileName + "." + fileExtension;
}

Leave a Reply