One test runner to rule them all.

testing/tools/test_runner.py

Index: testing/tools/test_runner.py
diff --git a/testing/tools/test_runner.py b/testing/tools/test_runner.py
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+#!/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 function 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 os.path.exists(original_path) and not os.path.exists(input_path):
+      shutil.copyfile(original_path, pdf_path)
+
+    if not os.path.exists(input_path):
+      return None
+
+    cmd = [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')
+    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.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.test_suppressor = suppressor.Suppressor(finder)
+    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
+