create unittest for gm/rebaseline_server/results.py

gm/rebaseline_server/results_test.py

+#!/usr/bin/python
+
+"""
+Copyright 2013 Google Inc.
+
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file.
+
+Test results.py
+
+TODO(epoger): Launch this (and other unittests within this dir) automatically
+on the housekeeper bot, but first make sure it works properly after having been
+checked out (from both git and svn)
+
+TODO(epoger): Create a command to update the expected results (in
+OUTPUT_DIR_EXPECTATIONS) when appropriate.  For now, you should:
+1. examine the results in OUTPUT_DIR and make sure they are ok
+2. rm -rf OUTPUT_DIR_EXPECTATIONS
+3. mv OUTPUT_DIR OUTPUT_DIR_EXPECTATIONS
+Although, if you're using an SVN checkout, this will blow away .svn directories
+within OUTPUT_DIR_EXPECTATIONS, which wouldn't be good...
+
+"""
+
+import filecmp
+import os
+import shutil
+import sys
+import tempfile
+import unittest
+
+# Imports from within Skia
+import results
+import gm_json  # must import results first, so that gm_json will be in sys.path
+
+PARENT_DIR = os.path.dirname(os.path.realpath(__file__))
+INPUT_DIR = os.path.join(PARENT_DIR, 'tests', 'inputs')
+OUTPUT_DIR = os.path.join(PARENT_DIR, 'tests', 'outputs', 'actual')
+OUTPUT_DIR_EXPECTATIONS = os.path.join(
+    PARENT_DIR, 'tests', 'outputs', 'expected')
+
+class ResultsTest(unittest.TestCase):
+
+  def setUp(self):
+    self._tempdir = tempfile.mkdtemp()
+
+  def tearDown(self):
+    shutil.rmtree(self._tempdir)
+
+  def test_gm(self):
+    """Process results of a GM run with the Results object."""
+    results_obj = results.Results(
+        actuals_root=os.path.join(INPUT_DIR, 'gm-actuals'),
+        expected_root=os.path.join(INPUT_DIR, 'gm-expectations'),
+        generated_images_root=self._tempdir)
+    gm_json.WriteToFile(results_obj.get_results_of_type(results.RESULTS_ALL),
+                        os.path.join(OUTPUT_DIR, 'gm.json'))
+
+
+def find_different_files(dir1, dir2, ignore_subtree_names=None):
+  """Returns a list of any files that differ between the directory trees rooted
+  at dir1 and dir2.
+
+  Args:
+    dir1: root of a directory tree; if nonexistent, will raise OSError
+    dir2: root of another directory tree; if nonexistent, will raise OSError
+    ignore_subtree_names: list of subtree directory names to ignore;
+          defaults to ['.svn'], so all SVN files are ignores
+
+  TODO(epoger): include the dirname within each filename (not just the
+  basename), to make it easier to locate any differences
+  """
+  differing_files = []
+  if ignore_subtree_names is None:
+    ignore_subtree_names = ['.svn']
+  dircmp = filecmp.dircmp(dir1, dir2, ignore=ignore_subtree_names)
+  differing_files.extend(dircmp.left_only)
+  differing_files.extend(dircmp.right_only)
+  differing_files.extend(dircmp.common_funny)
+  differing_files.extend(dircmp.diff_files)
+  differing_files.extend(dircmp.funny_files)
+  for common_dir in dircmp.common_dirs:
+    differing_files.extend(find_different_files(
+        os.path.join(dir1, common_dir), os.path.join(dir2, common_dir)))
+  return differing_files
+
+
+def main():
+  if not os.path.isdir(OUTPUT_DIR):
+    os.makedirs(OUTPUT_DIR)
+  suite = unittest.TestLoader().loadTestsFromTestCase(ResultsTest)
+  unittest.TextTestRunner(verbosity=2).run(suite)
+  different_files = find_different_files(OUTPUT_DIR, OUTPUT_DIR_EXPECTATIONS)
+  assert (not different_files), 'found differing files: %s' % different_files
+
+
+if __name__ == '__main__':
+  main()