Revert of Combined test runner. (patchset #2 id:20001 of https://codereview.chromium.org/1850273003/ )

Reason for revert:
Broke Dr. Memory

Original issue's description:
> Combined test runner.
>
> This CL revives the old CL to combine the test runners [1] which was reverted
> due to failing font_size tests. I've deleted the font_size.pdf as it is not
> needed and for testing. Pixel tests are either .in or .pdf files, not both.
>
> Original description:
> This CL takes the three test runners (corpus, javascript, pixel) and combines
> the code into a single test_runner file. Each of the individual runners still
> exists and calls the test runner with their data directory.
>
> With this change, the pixel and javascript test will now run in parallel if
> multiple processors are available.
>
> 1-https://codereview.chromium.org/1430623006/
>
> Committed: https://pdfium.googlesource.com/pdfium/+/03e8f12cd3788038225d0376a164a9993f6cb720

TBR=tsepez@chromium.org,thestig@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1867643002

5 files changed, 418 insertions, 244 deletions

diff --git a/testing/resources/pixel/font_size.pdf b/testing/resources/pixel/font_size.pdf
new file mode 100644
index 0000000000..5a42260ce9
--- /dev/null
+++ b/testing/resources/pixel/font_size.pdf
@@ -0,0 +1,72 @@
+%PDF-1.7
+% ò¤ô
+1 0 obj <<
+  /Type /Catalog
+  /Pages 2 0 R
+>>
+2 0 obj <<
+  /Type /Pages
+  /MediaBox [ 0 0 100 400 ]
+  /Count 1
+  /Kids [ 3 0 R ]
+>>
+endobj
+3 0 obj <<
+  /Type /Page
+  /Parent 2 0 R
+  /Resources <<
+    /Font <<
+      /F1 4 0 R
+    >>
+  >>
+  /Contents 6 0 R
+>>
+endobj
+4 0 obj <<
+  /Type /Font
+  /Subtype /Type1
+  /BaseFont /Times-Roman
+>>
+endobj
+6 0 obj <<
+>>
+stream
+BT
+20 0 Td
+0 20 Td /F1 0 Tf (Size 0) Tj
+0 20 Td /F1 1 Tf (Size 1) Tj
+0 20 Td /F1 2 Tf (Size 2) Tj
+0 20 Td /F1 3 Tf (Size 3) Tj
+0 20 Td /F1 4 Tf (Size 4) Tj
+0 20 Td /F1 5 Tf (Size 5) Tj
+0 20 Td /F1 6 Tf (Size 6) Tj
+0 20 Td /F1 7 Tf (Size 7) Tj
+0 20 Td /F1 8 Tf (Size 8) Tj
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+0 20 Td /F1 11 Tf (Size 11) Tj
+0 20 Td /F1 12 Tf (Size 12) Tj
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+0 20 Td /F1 15 Tf (Size 15) Tj
+0 20 Td /F1 16 Tf (Size 16) Tj
+0 20 Td /F1 17 Tf (Size 17) Tj
+0 20 Td /F1 18 Tf (Size 18) Tj
+ET
+endstream
+endobj
+xref
+0 7
+0000000000 65535 f 
+0000000015 00000 n 
+0000000061 00000 n 
+0000000154 00000 n 
+0000000280 00000 n 
+0000000000 65535 f 
+0000000358 00000 n 
+trailer <<
+  /Root 1 0 R
+>>
+startxref
+979
+%%EOF
diff --git a/testing/tools/run_corpus_tests.py b/testing/tools/run_corpus_tests.py
index dd81a2736d..0c44cc6972 100755
--- a/testing/tools/run_corpus_tests.py
+++ b/testing/tools/run_corpus_tests.py
@@ -3,13 +3,174 @@
 # 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
+import re
+import shutil
+import subprocess
 import sys
 
-import test_runner
+import common
+import pngdiffer
+import suppressor
+
+class KeyboardInterruptError(Exception): pass
+
+# Nomenclature:
+#   x_root - "x"
+#   x_filename - "x.ext"
+#   x_path - "path/to/a/b/c/x.ext"
+#   c_dir - "path/to/a/b/c"
+
+def test_one_file(input_filename, source_dir, working_dir,
+                  pdfium_test_path, image_differ, drmem_wrapper,
+                  redirect_output=False):
+  input_path = os.path.join(source_dir, input_filename)
+  pdf_path = os.path.join(working_dir, input_filename)
+  # Remove any existing generated images from previous runs.
+  actual_images = image_differ.GetActualFiles(
+      input_filename, source_dir, working_dir)
+  for image in actual_images:
+    if os.path.exists(image):
+      os.remove(image)
+
+  shutil.copyfile(input_path, pdf_path)
+  sys.stdout.flush()
+  # add Dr. Memory wrapper if exist
+  # remove .pdf suffix
+  cmd_to_run = common.DrMemoryWrapper(drmem_wrapper,
+                                      os.path.splitext(input_filename)[0])
+  cmd_to_run.extend([pdfium_test_path, '--png', pdf_path])
+  # run test
+  error = common.RunCommand(cmd_to_run, redirect_output)
+  if error:
+    print "FAILURE: " + input_filename + "; " + str(error)
+    return False
+  return not image_differ.HasDifferences(input_filename, source_dir,
+                                         working_dir, redirect_output)
+
+
+def test_one_file_parallel(working_dir, pdfium_test_path, image_differ,
+                           test_case):
+  """Wrapper function to call test_one_file() and redirect output to stdout."""
+  try:
+    old_stdout = sys.stdout
+    old_stderr = sys.stderr
+    sys.stdout = cStringIO.StringIO()
+    sys.stderr = sys.stdout
+    input_filename, source_dir = test_case
+    result = test_one_file(input_filename, source_dir, working_dir,
+                           pdfium_test_path, image_differ, "", True);
+    output = sys.stdout
+    sys.stdout = old_stdout
+    sys.stderr = old_stderr
+    return (result, output.getvalue(), input_filename, source_dir)
+  except KeyboardInterrupt:
+    raise KeyboardInterruptError()
+
+
+def handle_result(test_suppressor, input_filename, input_path, result,
+                  surprises, failures):
+  if test_suppressor.IsSuppressed(input_filename):
+    if result:
+      surprises.append(input_path)
+  else:
+    if not result:
+      failures.append(input_path)
+
 
 def main():
-  runner = test_runner.TestRunner('corpus')
-  return runner.Run()
+  parser = optparse.OptionParser()
+  parser.add_option('--build-dir', default=os.path.join('out', 'Debug'),
+                    help='relative path from the base source directory')
+  parser.add_option('-j', default=multiprocessing.cpu_count(),
+                    dest='num_workers', type='int',
+                    help='run NUM_WORKERS jobs in parallel')
+  parser.add_option('--wrapper', default='', dest="wrapper",
+                    help='Dr. Memory wrapper for running test under Dr. Memory')
+  options, args = parser.parse_args()
+  finder = common.DirectoryFinder(options.build_dir)
+  pdfium_test_path = finder.ExecutablePath('pdfium_test')
+  if not os.path.exists(pdfium_test_path):
+    print "FAILURE: Can't find test executable '%s'" % pdfium_test_path
+    print "Use --build-dir to specify its location."
+    return 1
+  working_dir = finder.WorkingDir(os.path.join('testing', 'corpus'))
+  if not os.path.exists(working_dir):
+    os.makedirs(working_dir)
+
+  feature_string = subprocess.check_output([pdfium_test_path, '--show-config'])
+  test_suppressor = suppressor.Suppressor(finder, feature_string)
+  image_differ = pngdiffer.PNGDiffer(finder)
+
+  # test files are under .../pdfium/testing/corpus.
+  failures = []
+  surprises = []
+  walk_from_dir = finder.TestingDir('corpus');
+  input_file_re = re.compile('^[a-zA-Z0-9_.]+[.]pdf$')
+  test_cases = []
+
+  if len(args):
+    for file_name in args:
+      input_path = os.path.join(walk_from_dir, file_name)
+      if not os.path.isfile(input_path):
+        print "Can't find test file '%s'" % file_name
+        return 1
+
+      test_cases.append((os.path.basename(input_path),
+                         os.path.dirname(input_path)))
+  else:
+    for source_dir, _, filename_list in os.walk(walk_from_dir):
+      for input_filename in filename_list:
+        if input_file_re.match(input_filename):
+          input_path = os.path.join(source_dir, input_filename)
+          if os.path.isfile(input_path):
+            test_cases.append((input_filename, source_dir))
+
+  if options.num_workers > 1 and len(test_cases) > 1:
+    try:
+      pool = multiprocessing.Pool(options.num_workers)
+      worker_func = functools.partial(test_one_file_parallel, working_dir,
+                                      pdfium_test_path, image_differ)
+      worker_results = pool.imap(worker_func, test_cases)
+      for worker_result in worker_results:
+        result, output, input_filename, source_dir = worker_result
+        input_path = os.path.join(source_dir, input_filename)
+        sys.stdout.write(output)
+        handle_result(test_suppressor, input_filename, input_path, result,
+                      surprises, failures)
+      pool.close()
+    except KeyboardInterrupt:
+      pool.terminate()
+    finally:
+      pool.join()
+  else:
+    for test_case in test_cases:
+      input_filename, source_dir = test_case
+      result = test_one_file(input_filename, source_dir, working_dir,
+                             pdfium_test_path, image_differ,
+                             options.wrapper)
+      handle_result(test_suppressor, input_filename, input_path, result,
+                    surprises, failures)
+
+  if surprises:
+    surprises.sort()
+    print '\n\nUnexpected Successes:'
+    for surprise in surprises:
+      print surprise;
+
+  if failures:
+    failures.sort()
+    print '\n\nSummary of Failures:'
+    for failure in failures:
+      print failure
+    return 1
+
+  return 0
+
 
 if __name__ == '__main__':
   sys.exit(main())
diff --git a/testing/tools/run_javascript_tests.py b/testing/tools/run_javascript_tests.py
index 76d2379dbb..b09ea49e78 100755
--- a/testing/tools/run_javascript_tests.py
+++ b/testing/tools/run_javascript_tests.py
@@ -3,13 +3,97 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import optparse
+import os
+import re
+import subprocess
 import sys
 
-import test_runner
+import common
+
+# Nomenclature:
+#   x_root - "x"
+#   x_filename - "x.ext"
+#   x_path - "path/to/a/b/c/x.ext"
+#   c_dir - "path/to/a/b/c"
+
+def generate_and_test(input_filename, source_dir, working_dir,
+                      fixup_path, pdfium_test_path, text_diff_path,
+                      drmem_wrapper):
+  input_root, _ = os.path.splitext(input_filename)
+  input_path = os.path.join(source_dir, input_root + '.in')
+  pdf_path = os.path.join(working_dir, input_root + '.pdf')
+  txt_path = os.path.join(working_dir, input_root + '.txt')
+  expected_path = os.path.join(source_dir, input_root + '_expected.txt')
+  try:
+    sys.stdout.flush()
+    subprocess.check_call(
+        [sys.executable, fixup_path, '--output-dir=' + working_dir, input_path])
+    with open(txt_path, 'w') as outfile:
+      # add Dr. Memory wrapper if exist
+      cmd_to_run = common.DrMemoryWrapper(drmem_wrapper, input_root)
+      cmd_to_run.extend([pdfium_test_path, pdf_path])
+      # run test
+      subprocess.check_call(cmd_to_run, stdout=outfile)
+    subprocess.check_call(
+        [sys.executable, text_diff_path, expected_path, txt_path])
+  except subprocess.CalledProcessError as e:
+    print "FAILURE: " + input_filename + "; " + str(e)
+    return False
+  return True
 
 def main():
-  runner = test_runner.TestRunner('javascript')
-  return runner.Run()
+  parser = optparse.OptionParser()
+  parser.add_option('--build-dir', default=os.path.join('out', 'Debug'),
+                    help='relative path from the base source directory')
+  parser.add_option('--wrapper', default='', dest="wrapper",
+                    help='Dr. Memory wrapper for running test under Dr. Memory')
+  options, args = parser.parse_args()
+
+  finder = common.DirectoryFinder(options.build_dir)
+  fixup_path = finder.ScriptPath('fixup_pdf_template.py')
+  text_diff_path = finder.ScriptPath('text_diff.py')
+  source_dir = finder.TestingDir(os.path.join('resources', 'javascript'))
+  pdfium_test_path = finder.ExecutablePath('pdfium_test')
+  if not os.path.exists(pdfium_test_path):
+    print "FAILURE: Can't find test executable '%s'" % pdfium_test_path
+    print "Use --build-dir to specify its location."
+    return 1
+  working_dir = finder.WorkingDir(os.path.join('testing', 'javascript'))
+  if not os.path.exists(working_dir):
+    os.makedirs(working_dir)
+
+  feature_string = subprocess.check_output([pdfium_test_path, '--show-config'])
+  if "V8" not in feature_string.strip().split(","):
+    print "V8 not enabled, skipping."
+    return 0
+
+  input_files = []
+  if len(args):
+    for file_name in args:
+      input_files.append(file_name.replace(".pdf", ".in"))
+  else:
+    input_files = os.listdir(source_dir)
+
+  failures = []
+  input_file_re = re.compile('^[a-zA-Z0-9_.]+[.]in$')
+  for input_filename in input_files:
+    if input_file_re.match(input_filename):
+      input_path = os.path.join(source_dir, input_filename)
+      if os.path.isfile(input_path):
+        if not generate_and_test(input_filename, source_dir, working_dir,
+                                 fixup_path, pdfium_test_path, text_diff_path,
+                                 options.wrapper):
+          failures.append(input_path)
+
+  if failures:
+    failures.sort()
+    print '\n\nSummary of Failures:'
+    for failure in failures:
+      print failure
+    return 1
+  return 0
+
 
 if __name__ == '__main__':
   sys.exit(main())
diff --git a/testing/tools/run_pixel_tests.py b/testing/tools/run_pixel_tests.py
index aad39c5600..8a102f4c42 100755
--- a/testing/tools/run_pixel_tests.py
+++ b/testing/tools/run_pixel_tests.py
@@ -3,13 +3,105 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import optparse
+import os
+import re
+import subprocess
 import sys
 
-import test_runner
+import common
+import pngdiffer
+import suppressor
+
+# Nomenclature:
+#   x_root - "x"
+#   x_filename - "x.ext"
+#   x_path - "path/to/a/b/c/x.ext"
+#   c_dir - "path/to/a/b/c"
+
+def generate_and_test(input_filename, source_dir, working_dir,
+                      fixup_path, pdfium_test_path, image_differ,
+                      drmem_wrapper):
+  input_root, _ = os.path.splitext(input_filename)
+  input_path = os.path.join(source_dir, input_root + '.in')
+  pdf_path = os.path.join(working_dir, input_root + '.pdf')
+
+  # Remove any existing generated images from previous runs.
+  actual_images = image_differ.GetActualFiles(
+      input_filename, source_dir, working_dir)
+  for image in actual_images:
+    if os.path.exists(image):
+      os.remove(image)
+
+  try:
+    sys.stdout.flush()
+    subprocess.check_call(
+        [sys.executable, fixup_path, '--output-dir=' + working_dir, input_path])
+    # add Dr. Memory wrapper if exist
+    cmd_to_run = common.DrMemoryWrapper(drmem_wrapper, input_root)
+    cmd_to_run.extend([pdfium_test_path, '--png', pdf_path])
+    # run test
+    subprocess.check_call(cmd_to_run)
+  except subprocess.CalledProcessError as e:
+    print "FAILURE: " + input_filename + "; " + str(e)
+    return False
+  if image_differ.HasDifferences(input_filename, source_dir, working_dir):
+    print "FAILURE: " + input_filename
+    return False
+  return True
+
 
 def main():
-  runner = test_runner.TestRunner('pixel')
-  return runner.Run()
+  parser = optparse.OptionParser()
+  parser.add_option('--build-dir', default=os.path.join('out', 'Debug'),
+                    help='relative path from the base source directory')
+  parser.add_option('--wrapper', default='', dest="wrapper",
+                    help='Dr. Memory wrapper for running test under Dr. Memory')
+  options, args = parser.parse_args()
+  finder = common.DirectoryFinder(options.build_dir)
+  fixup_path = finder.ScriptPath('fixup_pdf_template.py')
+  source_dir = finder.TestingDir(os.path.join('resources', 'pixel'))
+  pdfium_test_path = finder.ExecutablePath('pdfium_test')
+  if not os.path.exists(pdfium_test_path):
+    print "FAILURE: Can't find test executable '%s'" % pdfium_test_path
+    print "Use --build-dir to specify its location."
+    return 1
+  working_dir = finder.WorkingDir(os.path.join('testing', 'pixel'))
+  if not os.path.exists(working_dir):
+    os.makedirs(working_dir)
+
+  feature_string = subprocess.check_output([pdfium_test_path, '--show-config'])
+  test_suppressor = suppressor.Suppressor(finder, feature_string)
+  image_differ = pngdiffer.PNGDiffer(finder)
+
+  input_files = []
+  if len(args):
+    for file_name in args:
+      input_files.append(file_name.replace(".pdf", ".in"))
+  else:
+    input_files = os.listdir(source_dir)
+
+  failures = []
+  input_file_re = re.compile('^[a-zA-Z0-9_.]+[.]in$')
+  for input_filename in input_files:
+    if input_file_re.match(input_filename):
+      input_path = os.path.join(source_dir, input_filename)
+      if os.path.isfile(input_path):
+        if test_suppressor.IsSuppressed(input_filename):
+          continue
+        if not generate_and_test(input_filename, source_dir, working_dir,
+                                 fixup_path, pdfium_test_path, image_differ,
+                                 options.wrapper):
+          failures.append(input_path)
+
+  if failures:
+    failures.sort()
+    print '\n\nSummary of Failures:'
+    for failure in failures:
+      print failure
+    return 1
+  return 0
+
 
 if __name__ == '__main__':
   sys.exit(main())
diff --git a/testing/tools/test_runner.py b/testing/tools/test_runner.py
deleted file mode 100644
index 183dd1b267..0000000000
--- a/testing/tools/test_runner.py
+++ /dev/null
@@ -1,235 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2015 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
-import re
-import shutil
-import subprocess
-import sys
-
-import common
-import pngdiffer
-import suppressor
-
-class KeyboardInterruptError(Exception): pass
-
-# Nomenclature:
-#   x_root - "x"
-#   x_filename - "x.ext"
-#   x_path - "path/to/a/b/c/x.ext"
-#   c_dir - "path/to/a/b/c"
-
-def TestOneFileParallel(this, test_case):
-  """Wrapper to call GenerateAndTest() and redirect output to stdout."""
-  try:
-    old_stdout = sys.stdout
-    old_stderr = sys.stderr
-    sys.stdout = cStringIO.StringIO()
-    sys.stderr = sys.stdout
-
-    input_filename, source_dir = test_case
-    result = this.GenerateAndTest(input_filename, source_dir, True);
-
-    output = sys.stdout
-    sys.stdout = old_stdout
-    sys.stderr = old_stderr
-    return (result, output.getvalue(), input_filename, source_dir)
-  except KeyboardInterrupt:
-    raise KeyboardInterruptError()
-
-class TestRunner:
-  def __init__(self, dirname):
-    self.test_dir = dirname
-
-  def GenerateAndTest(self, input_filename, source_dir, redirect_output=False):
-    input_root, _ = os.path.splitext(input_filename)
-    expected_txt_path = os.path.join(source_dir, input_root + '_expected.txt')
-
-    pdf_path = os.path.join(self.working_dir, input_root + '.pdf')
-
-    # Remove any existing generated images from previous runs.
-    actual_images = self.image_differ.GetActualFiles(input_filename, source_dir,
-                                                     self.working_dir)
-    for image in actual_images:
-      if os.path.exists(image):
-        os.remove(image)
-
-    sys.stdout.flush()
-
-    raised_exception = self.Generate(source_dir, input_filename, input_root,
-                                     pdf_path, redirect_output)
-
-    if raised_exception != None:
-      print "FAILURE: " + input_filename + "; " + str(raised_exception)
-      return False
-
-    if os.path.exists(expected_txt_path):
-      raised_exception = self.TestText(input_root, expected_txt_path, pdf_path,
-                                       redirect_output)
-    else:
-      raised_exception = self.TestPixel(pdf_path, redirect_output)
-
-    if raised_exception != None:
-      print "FAILURE: " + input_filename + "; " + str(raised_exception)
-      return False
-
-    if len(actual_images):
-      if self.image_differ.HasDifferences(input_filename, source_dir,
-                                          self.working_dir, redirect_output):
-        return False
-
-    return True
-
-
-  def Generate(self, source_dir, input_filename, input_root, pdf_path,
-               redirect_output):
-    original_path = os.path.join(source_dir, input_filename)
-    input_path = os.path.join(source_dir, input_root + '.in')
-
-    if not os.path.exists(input_path):
-      if os.path.exists(original_path):
-        shutil.copyfile(original_path, pdf_path)
-      return None
-
-    # Add Dr. Memory wrapper if exists.
-    cmd = common.DrMemoryWrapper(self.drmem_wrapper, input_root)
-    cmd.extend([sys.executable, self.fixup_path,
-                '--output-dir=' + self.working_dir, input_path])
-    return common.RunCommand(cmd, redirect_output)
-
-
-  def TestText(self, input_root, expected_txt_path, pdf_path, redirect_output):
-    txt_path = os.path.join(self.working_dir, input_root + '.txt')
-    with open(txt_path, 'w') as outfile:
-      subprocess.check_call([self.pdfium_test_path, pdf_path], stdout=outfile)
-
-    cmd = [sys.executable, self.text_diff_path, expected_txt_path, txt_path]
-    return common.RunCommand(cmd, redirect_output)
-
-
-  def TestPixel(self, pdf_path, redirect_output):
-    return common.RunCommand(
-        [self.pdfium_test_path, '--png', pdf_path], redirect_output)
-
-
-  def HandleResult(self, input_filename, input_path, result):
-    if self.test_suppressor.IsSuppressed(input_filename):
-      if result:
-        self.surprises.append(input_path)
-    else:
-      if not result:
-        self.failures.append(input_path)
-
-
-  def Run(self):
-    parser = optparse.OptionParser()
-    parser.add_option('--build-dir', default=os.path.join('out', 'Debug'),
-                      help='relative path from the base source directory')
-    parser.add_option('-j', default=multiprocessing.cpu_count(),
-                      dest='num_workers', type='int',
-                      help='run NUM_WORKERS jobs in parallel')
-    parser.add_option('--wrapper', default='', dest="wrapper",
-                      help='wrapper for running test under Dr. Memory')
-    options, args = parser.parse_args()
-
-    finder = common.DirectoryFinder(options.build_dir)
-    self.fixup_path = finder.ScriptPath('fixup_pdf_template.py')
-    self.text_diff_path = finder.ScriptPath('text_diff.py')
-
-    self.drmem_wrapper = options.wrapper
-
-    self.source_dir = finder.TestingDir()
-
-    if self.test_dir != 'corpus':
-      test_dir = finder.TestingDir(os.path.join('resources', self.test_dir))
-    else:
-      test_dir = finder.TestingDir(self.test_dir)
-
-    self.pdfium_test_path = finder.ExecutablePath('pdfium_test')
-    if not os.path.exists(self.pdfium_test_path):
-      print "FAILURE: Can't find test executable '%s'" % self.pdfium_test_path
-      print "Use --build-dir to specify its location."
-      return 1
-
-    self.working_dir = finder.WorkingDir(os.path.join('testing', self.test_dir))
-    if not os.path.exists(self.working_dir):
-      os.makedirs(self.working_dir)
-
-    self.feature_string = subprocess.check_output([self.pdfium_test_path,
-                                              '--show-config'])
-    self.test_suppressor = suppressor.Suppressor(finder, self.feature_string)
-    self.image_differ = pngdiffer.PNGDiffer(finder)
-
-    walk_from_dir = finder.TestingDir(test_dir);
-
-    test_cases = []
-    input_file_re = re.compile('^[a-zA-Z0-9_.]+[.](in|pdf)$')
-
-    if len(args):
-      for file_name in args:
-        file_name.replace(".pdf", ".in")
-        input_path = os.path.join(walk_from_dir, file_name)
-        if not os.path.isfile(input_path):
-          print "Can't find test file '%s'" % file_name
-          return 1
-
-        test_cases.append((os.path.basename(input_path),
-                           os.path.dirname(input_path)))
-    else:
-      for file_dir, _, filename_list in os.walk(walk_from_dir):
-        for input_filename in filename_list:
-          if input_file_re.match(input_filename):
-            input_path = os.path.join(file_dir, input_filename)
-            if os.path.isfile(input_path):
-              test_cases.append((input_filename, file_dir))
-
-    self.failures = []
-    self.surprises = []
-
-    if options.num_workers > 1 and not len(args):
-      try:
-        pool = multiprocessing.Pool(options.num_workers)
-        worker_func = functools.partial(TestOneFileParallel, self)
-
-        worker_results = pool.imap(worker_func, test_cases)
-        for worker_result in worker_results:
-          result, output, input_filename, source_dir = worker_result
-          input_path = os.path.join(source_dir, input_filename)
-          sys.stdout.write(output)
-
-          self.HandleResult(input_filename, input_path, result)
-      except KeyboardInterrupt:
-        pool.terminate()
-      finally:
-        pool.close()
-        pool.join()
-    else:
-      for test_case in test_cases:
-        input_filename, input_file_dir = test_case
-        result = self.GenerateAndTest(input_filename, input_file_dir)
-        self.HandleResult(input_filename,
-                          os.path.join(input_file_dir, input_filename), result)
-
-    if self.surprises:
-      self.surprises.sort()
-      print '\n\nUnexpected Successes:'
-      for surprise in self.surprises:
-        print surprise;
-
-    if self.failures:
-      self.failures.sort()
-      print '\n\nSummary of Failures:'
-      for failure in self.failures:
-        print failure
-      return 1
-
-    return 0
-
-
-