tools/perf/page_sets/new_tab_page.py

   1 # Copyright 2015 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 import time
   5
   6 from telemetry.page import page as page_module
   7 from telemetry.page import shared_page_state
   8 from telemetry import story
   9
  10 INTERACTION_NAME = 'Interaction.PageLoading'
  11
  12 # How long to wait for the page to finish rendering.
  13 LOADING_DELAY_S = 5
  14
  15
  16 class NewTabPagePage(page_module.Page):
  17
  18   def __init__(self, page_set):
  19     super(NewTabPagePage, self).__init__(
  20       name='newtabpagepage',
  21       url='chrome://newtab',
  22       shared_page_state_class=shared_page_state.SharedDesktopPageState,
  23       page_set=page_set)
  24     self.archive_data_file = 'data/new_tab_page_page.json'
  25     self.script_to_evaluate_on_commit = (
  26         "console.time('" + INTERACTION_NAME + "');")
  27
  28   def RunNavigateSteps(self, action_runner):
  29     url = self.file_path_url_with_scheme if self.is_file else self.url
  30     action_runner.Navigate(
  31         url, script_to_evaluate_on_commit=self.script_to_evaluate_on_commit)
  32     # We pause for a while so the async JS gets a chance to run.
  33     time.sleep(LOADING_DELAY_S)
  34     # TODO(beaudoin): We have no guarantee the page has fully rendered and the
  35     #   JS has fully executed at that point. The right way to do it would be to
  36     #   toggle a Javascript variable in the page code and to wait for it here.
  37     #   This should be done when window.performance.mark is supported and we
  38     #   migrate to it instead of calling console.timeEnd here. If the test is
  39     #   failing flakily, we should use a better heuristic.
  40     action_runner.ExecuteJavaScript(
  41         "console.timeEnd('" + INTERACTION_NAME + "');")
  42
  43
  44 class NewTabPagePageSet(story.StorySet):
  45   def __init__(self):
  46     super(NewTabPagePageSet, self).__init__(
  47         archive_data_file='data/new_tab_page_page.json',
  48         cloud_storage_bucket=story.PUBLIC_BUCKET)
  49     self.AddStory(NewTabPagePage(page_set=self))