src/content/test/gpu/gpu_tests/pixel.py

   1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4 from datetime import datetime
   5 import glob
   6 import optparse
   7 import os
   8 import re
   9
  10 import cloud_storage_test_base
  11 import page_sets
  12 import pixel_expectations
  13
  14 from telemetry import benchmark
  15 from telemetry.core import bitmap
  16 from telemetry.page import page_test
  17 from telemetry.util import cloud_storage
  18
  19
  20 test_data_dir = os.path.abspath(os.path.join(
  21     os.path.dirname(__file__), '..', '..', 'data', 'gpu'))
  22
  23 default_reference_image_dir = os.path.join(test_data_dir, 'gpu_reference')
  24
  25 test_harness_script = r"""
  26   var domAutomationController = {};
  27
  28   domAutomationController._succeeded = false;
  29   domAutomationController._finished = false;
  30
  31   domAutomationController.setAutomationId = function(id) {}
  32
  33   domAutomationController.send = function(msg) {
  34     domAutomationController._finished = true;
  35
  36     if(msg.toLowerCase() == "success") {
  37       domAutomationController._succeeded = true;
  38     } else {
  39       domAutomationController._succeeded = false;
  40     }
  41   }
  42
  43   window.domAutomationController = domAutomationController;
  44 """
  45
  46 class PixelTestFailure(Exception):
  47   pass
  48
  49 def _DidTestSucceed(tab):
  50   return tab.EvaluateJavaScript('domAutomationController._succeeded')
  51
  52 class _PixelValidator(cloud_storage_test_base.ValidatorBase):
  53   def CustomizeBrowserOptions(self, options):
  54     options.AppendExtraBrowserArgs('--enable-gpu-benchmarking')
  55
  56   def ValidateAndMeasurePage(self, page, tab, results):
  57     if not _DidTestSucceed(tab):
  58       raise page_test.Failure('Page indicated a failure')
  59
  60     if not tab.screenshot_supported:
  61       raise page_test.Failure('Browser does not support screenshot capture')
  62
  63     screenshot = tab.Screenshot(5)
  64
  65     if not screenshot:
  66       raise page_test.Failure('Could not capture screenshot')
  67
  68     if hasattr(page, 'test_rect'):
  69       screenshot = screenshot.Crop(
  70           page.test_rect[0], page.test_rect[1],
  71           page.test_rect[2], page.test_rect[3])
  72
  73     image_name = self._UrlToImageName(page.display_name)
  74
  75     if self.options.upload_refimg_to_cloud_storage:
  76       if self._ConditionallyUploadToCloudStorage(image_name, page, tab,
  77                                                  screenshot):
  78         # This is the new reference image; there's nothing to compare against.
  79         ref_png = screenshot
  80       else:
  81         # There was a preexisting reference image, so we might as well
  82         # compare against it.
  83         ref_png = self._DownloadFromCloudStorage(image_name, page, tab)
  84     elif self.options.download_refimg_from_cloud_storage:
  85       # This bot doesn't have the ability to properly generate a
  86       # reference image, so download it from cloud storage.
  87       try:
  88         ref_png = self._DownloadFromCloudStorage(image_name, page, tab)
  89       except cloud_storage.NotFoundError as e:
  90         # There is no reference image yet in cloud storage. This
  91         # happens when the revision of the test is incremented or when
  92         # a new test is added, because the trybots are not allowed to
  93         # produce reference images, only the bots on the main
  94         # waterfalls. Report this as a failure so the developer has to
  95         # take action by explicitly suppressing the failure and
  96         # removing the suppression once the reference images have been
  97         # generated. Otherwise silent failures could happen for long
  98         # periods of time.
  99         raise page_test.Failure('Could not find image %s in cloud storage' %
 100                                 image_name)
 101     else:
 102       # Legacy path using on-disk results.
 103       ref_png = self._GetReferenceImage(self.options.reference_dir,
 104           image_name, page.revision, screenshot)
 105
 106     # Test new snapshot against existing reference image
 107     if not ref_png.IsEqual(screenshot, tolerance=2):
 108       if self.options.test_machine_name:
 109         self._UploadErrorImagesToCloudStorage(image_name, screenshot, ref_png)
 110       else:
 111         self._WriteErrorImages(self.options.generated_dir, image_name,
 112                                screenshot, ref_png)
 113       raise page_test.Failure('Reference image did not match captured screen')
 114
 115   def _DeleteOldReferenceImages(self, ref_image_path, cur_revision):
 116     if not cur_revision:
 117       return
 118
 119     old_revisions = glob.glob(ref_image_path + "_*.png")
 120     for rev_path in old_revisions:
 121       m = re.match(r'^.*_(\d+)\.png$', rev_path)
 122       if m and int(m.group(1)) < cur_revision:
 123         print 'Found deprecated reference image. Deleting rev ' + m.group(1)
 124         os.remove(rev_path)
 125
 126   def _GetReferenceImage(self, img_dir, img_name, cur_revision, screenshot):
 127     if not cur_revision:
 128       cur_revision = 0
 129
 130     image_path = os.path.join(img_dir, img_name)
 131
 132     self._DeleteOldReferenceImages(image_path, cur_revision)
 133
 134     image_path = image_path + '_' + str(cur_revision) + '.png'
 135
 136     try:
 137       ref_png = bitmap.Bitmap.FromPngFile(image_path)
 138     except IOError:
 139       ref_png = None
 140
 141     if ref_png:
 142       return ref_png
 143
 144     print 'Reference image not found. Writing tab contents as reference.'
 145
 146     self._WriteImage(image_path, screenshot)
 147     return screenshot
 148
 149 class Pixel(cloud_storage_test_base.TestBase):
 150   test = _PixelValidator
 151
 152   @classmethod
 153   def AddTestCommandLineArgs(cls, group):
 154     super(Pixel, cls).AddTestCommandLineArgs(group)
 155     group.add_option('--reference-dir',
 156         help='Overrides the default on-disk location for reference images '
 157         '(only used for local testing without a cloud storage account)',
 158         default=default_reference_image_dir)
 159
 160   def CreatePageSet(self, options):
 161     page_set = page_sets.PixelTestsPageSet()
 162     for page in page_set.pages:
 163       page.script_to_evaluate_on_commit = test_harness_script
 164     return page_set
 165
 166   def CreateExpectations(self, page_set):
 167     return pixel_expectations.PixelExpectations()