Port hw_accel_feature and screenshot_sync tests to new harness.

content/test/gpu/gpu_tests/screenshot_sync_integration_test.py

Index: content/test/gpu/gpu_tests/screenshot_sync_integration_test.py
diff --git a/content/test/gpu/gpu_tests/screenshot_sync_integration_test.py b/content/test/gpu/gpu_tests/screenshot_sync_integration_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..43c63ebc018387f7e8687925e53d620524a93770
--- /dev/null
+++ b/content/test/gpu/gpu_tests/screenshot_sync_integration_test.py
@@ -0,0 +1,135 @@
+# Copyright 2017 The Chromium 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 logging
+import os
+import random
+
+from gpu_tests import gpu_integration_test
+from gpu_tests import path_util
+from gpu_tests import screenshot_sync_expectations
+
+from telemetry.util import image_util
+from telemetry.util import rgba_color
+
+data_path = os.path.join(
+    path_util.GetChromiumSrcDir(), 'content', 'test', 'data', 'gpu')
+
+class ScreenshotSyncIntegrationTest(gpu_integration_test.GpuIntegrationTest):
+  """Tests that screenshots are properly synchronized with the frame on
+  which they were requested.
+  """
+
+  # We store a deep copy of the original browser finder options in
+  # order to be able to restart the browser multiple times, with a
+  # different set of command line arguments each time.
+  _original_finder_options = None
+
+  # We keep track of the set of command line arguments used to launch
+  # the browser most recently in order to figure out whether we need
+  # to relaunch it, if a new pixel test requires a different set of
+  # arguments.
+  _last_launched_browser_args = set()
+
+  @classmethod
+  def Name(cls):
+    """The name by which this test is invoked on the command line."""
+    return 'screenshot_sync'
+
+  @classmethod
+  def setUpClass(cls):
+    super(cls, ScreenshotSyncIntegrationTest).setUpClass()
+    cls._original_finder_options = cls._finder_options.Copy()
+    cls.CustomizeBrowserArgs([])
+    cls.StartBrowser()
+    cls.SetStaticServerDirs([data_path])
+
+  @classmethod
+  def CustomizeBrowserArgs(cls, browser_args):
+    if not browser_args:
+      browser_args = []
+    cls._finder_options = cls._original_finder_options.Copy()
+    browser_options = cls._finder_options.browser_options
+    # All tests receive the following options. They aren't recorded in
+    # the _last_launched_browser_args.
+    #
+    # --test-type=gpu is used only to suppress the "Google API Keys are missing"
+    # infobar, which causes flakiness in tests.
+    browser_options.AppendExtraBrowserArgs(['--test-type=gpu'])
+    # Append the new arguments.
+    browser_options.AppendExtraBrowserArgs(browser_args)
+    cls._last_launched_browser_args = set(browser_args)
+    cls.SetBrowserOptions(cls._finder_options)
+
+  @classmethod
+  def RestartBrowserIfNecessaryWithArgs(cls, browser_args):
+    if not browser_args:
+      browser_args = []
+    if set(browser_args) != cls._last_launched_browser_args:
+      logging.info('Restarting browser with arguments: ' + str(browser_args))
+      cls.StopBrowser()
+      cls.CustomizeBrowserArgs(browser_args)
+      cls.StartBrowser()
+      cls.tab = cls.browser.tabs[0]
+
+  @classmethod
+  def _CreateExpectations(cls):
+    return screenshot_sync_expectations.ScreenshotSyncExpectations()
+
+  @classmethod
+  def GenerateGpuTests(cls, options):
+    yield('ScreenshotSync_SWRasterWithCanvas',
+          'screenshot_sync_canvas.html',
+          ('--disable-gpu-rasterization'))
+    yield('ScreenshotSync_SWRasterWithDivs',
+          'screenshot_sync_divs.html',
+          ('--disable-gpu-rasterization'))
+    yield('ScreenshotSync_GPURasterWithCanvas',
+          'screenshot_sync_canvas.html',
+          ('--force-gpu-rasterization'))
+    yield('ScreenshotSync_GPURasterWithDivs',
+          'screenshot_sync_divs.html',
+          ('--force-gpu-rasterization'))
+
+  def _Navigate(self, test_path):
+    url = self.UrlOfStaticFilePath(test_path)
+    # It's crucial to use the action_runner, rather than the tab's
+    # Navigate method directly. It waits for the document ready state
+    # to become interactive or better, avoiding critical race
+    # conditions.
+    self.tab.action_runner.Navigate(url)
+
+  def _CheckColorMatchAtLocation(self, expectedRGB, screenshot, x, y):
+    pixel_value = image_util.GetPixelColor(screenshot, x, y)
+    if not expectedRGB.IsEqual(pixel_value):
+      error_message = ('Color mismatch at (%d, %d): expected (%d, %d, %d), ' +
+                       'got (%d, %d, %d)') % (
+                         x, y, expectedRGB.r, expectedRGB.g, expectedRGB.b,
+                         pixel_value.r, pixel_value.g, pixel_value.b)
+      self.fail(error_message)
+
+  def _CheckScreenshot(self):
+    canvasRGB = rgba_color.RgbaColor(random.randint(0, 255),
+                                     random.randint(0, 255),
+                                     random.randint(0, 255),
+                                     255)
+    tab = self.tab
+    tab.EvaluateJavaScript("window.draw(%d, %d, %d);" % (
+      canvasRGB.r, canvasRGB.g, canvasRGB.b))
+    screenshot = tab.Screenshot(5)
+    start_x = 10
+    start_y = 0
+    outer_size = 256
+    skip = 10
+    for y in range(start_y, outer_size, skip):
+      for x in range(start_x, outer_size, skip):
+        self._CheckColorMatchAtLocation(canvasRGB, screenshot, x, y)
+
+  def RunActualGpuTest(self, test_path, *args):
+    browser_arg = args[0]
+    self.RestartBrowserIfNecessaryWithArgs([browser_arg])
+    self._Navigate(test_path)
+    repetitions = 20
+    for _ in range(0, repetitions):
+      self._CheckScreenshot()