protected static void Execute()
 {
     try
     {
         runner = new ChutzpahTestRun(new ChutzpahTestSetup(testFile));
         runner.Run();
     }
     catch (Exception error)
     {
         err = error;
         Console.WriteLine(err);
     }
 }
 public void tidy()
 {
     testFile = null;
     err = null;
     runner = null;
 }