Ensures that the gold output directory exists

testing/tools/test_runner.py

 #!/usr/bin/env python
 # Copyright 2016 The PDFium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import cStringIO
 import functools
 import multiprocessing
 import optparse
 import os
@@ skipping 109 matching lines @@
     cmd_to_run = common.DrMemoryWrapper(self.drmem_wrapper, input_root)
     cmd_to_run.extend([self.pdfium_test_path, '--send-events', '--png'])
     if self.gold_results:
       cmd_to_run.append('--md5')
     cmd_to_run.append(pdf_path)
     return common.RunCommandExtractHashedFiles(cmd_to_run)
 
   def HandleResult(self, input_filename, input_path, result):
     if self.gold_results:
       success, image_paths = result
-      for img_path, md5_hash in image_paths:
-        # the output filename (without extension becomes the test name)
-        test_name = os.path.splitext(os.path.split(img_path)[1])[0]
-        self.gold_results.AddTestResult(test_name, md5_hash, img_path)
+      if image_paths:
+        for img_path, md5_hash in image_paths:
+          # the output filename (without extension becomes the test name)
+          test_name = os.path.splitext(os.path.split(img_path)[1])[0]
+          self.gold_results.AddTestResult(test_name, md5_hash, img_path)
 
     if self.test_suppressor.IsResultSuppressed(input_filename):
       if result:
         self.surprises.append(input_path)
     else:
       if not result:
         self.failures.append(input_path)
 
 
   def Run(self):
@@ skipping 118 matching lines @@
         print surprise;
 
     if self.failures:
       self.failures.sort()
       print '\n\nSummary of Failures:'
       for failure in self.failures:
         print failure
         if not options.ignore_errors:
           return 1
     return 0