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