create gm/rebaseline_server/test_all.py

gm/rebaseline_server/imagediffdb_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 imagediffdb.py
-
-TODO(epoger): Modify to use Python's unittest framework.
 """
 
 # System-level imports
 import logging
+import shutil
+import tempfile
+import unittest
 
 # Local imports
 import imagediffdb
 
 
-IMAGE_URL_BASE = 'http://chromium-skia-gm.commondatastorage.googleapis.com/gm/bitmap-64bitMD5/'
+IMG_URL_BASE = 'http://chromium-skia-gm.commondatastorage.googleapis.com/gm/bitmap-64bitMD5/'
+
+
+class ImageDiffDbTest(unittest.TestCase):
+
+  def setUp(self):
+    self._temp_dir = tempfile.mkdtemp()
+
+  def tearDown(self):
+    shutil.rmtree(self._temp_dir)
+
+  def shortDescription(self):
+    """Tell unittest framework to not print docstrings for test cases."""
+    return None
+
+  def test_simple(self):
+    # params for each self-test:
+    # 0. expected image locator
+    # 1. expected image URL
+    # 2. actual image locator
+    # 3. actual image URL
+    # 4. expected percent_pixels_differing (as a string, to 4 decimal places)
+    # 5. expected weighted_diff_measure (as a string, to 4 decimal places)
+    # 6. expected max_diff_per_channel
+    selftests = [
+        [
+            '16206093933823793653',
+            IMG_URL_BASE + 'arcofzorro/16206093933823793653.png',
+            '13786535001616823825',
+            IMG_URL_BASE + 'arcofzorro/13786535001616823825.png',
+            '0.0662', '0.0113', [255, 255, 247],
+        ],
+        [
+            '10552995703607727960',
+            IMG_URL_BASE + 'gradients_degenerate_2pt/10552995703607727960.png',
+            '11198253335583713230',
+            IMG_URL_BASE + 'gradients_degenerate_2pt/11198253335583713230.png',
+            '100.0000', '66.6667', [255, 0, 255],
+        ],
+    ]
+
+    # Add all image pairs to the database
+    db = imagediffdb.ImageDiffDB(self._temp_dir)
+    for selftest in selftests:
+      retval = db.add_image_pair(
+          expected_image_locator=selftest[0], expected_image_url=selftest[1],
+          actual_image_locator=selftest[2],   actual_image_url=selftest[3])
+
+    # Fetch each image pair from the database
+    for selftest in selftests:
+      record = db.get_diff_record(expected_image_locator=selftest[0],
+                                  actual_image_locator=selftest[2])
+      self.assertEqual('%.4f' % record.get_percent_pixels_differing(),
+                       selftest[4])
+      self.assertEqual('%.4f' % record.get_weighted_diff_measure(), selftest[5])
+      self.assertEqual(record.get_max_diff_per_channel(), selftest[6])
+
 
 def main():
-  logging.basicConfig(level=logging.INFO)
-
-  # params for each self-test:
-  # 0. expected image locator
-  # 1. expected image URL
-  # 2. actual image locator
-  # 3. actual image URL
-  # 4. expected percent_pixels_differing (as a string, to 4 decimal places)
-  # 5. expected weighted_diff_measure (as a string, to 4 decimal places)
-  # 6. expected max_diff_per_channel
-  selftests = [
-      [
-          '16206093933823793653',
-          IMAGE_URL_BASE + 'arcofzorro/16206093933823793653.png',
-          '13786535001616823825',
-          IMAGE_URL_BASE + 'arcofzorro/13786535001616823825.png',
-          '0.0662', '0.0113', [255, 255, 247],
-      ],
-      [
-          '10552995703607727960',
-          IMAGE_URL_BASE + 'gradients_degenerate_2pt/10552995703607727960.png',
-          '11198253335583713230',
-          IMAGE_URL_BASE + 'gradients_degenerate_2pt/11198253335583713230.png',
-          '100.0000', '66.6667', [255, 0, 255],
-      ],
-  ]
-
-  # Add all image pairs to the database
-  db = imagediffdb.ImageDiffDB('/tmp/ImageDiffDB')
-  for selftest in selftests:
-    retval = db.add_image_pair(
-        expected_image_locator=selftest[0], expected_image_url=selftest[1],
-        actual_image_locator=selftest[2],   actual_image_url=selftest[3])
-
-  # Fetch each image pair from the database
-  for selftest in selftests:
-    record = db.get_diff_record(expected_image_locator=selftest[0],
-                                actual_image_locator=selftest[2])
-    assert (('%.4f' % record.get_percent_pixels_differing()) == selftest[4])
-    assert (('%.4f' % record.get_weighted_diff_measure()) == selftest[5])
-    assert (record.get_max_diff_per_channel() == selftest[6])
-  logging.info("Self-test completed successfully!")
+  suite = unittest.TestLoader().loadTestsFromTestCase(ImageDiffDbTest)
+  unittest.TextTestRunner(verbosity=2).run(suite)
 
 
 if __name__ == '__main__':
   main()