tools/perf/page_sets/key_noop_cases.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 from telemetry.page import page as page_module
   5 from telemetry.page import shared_page_state
   6 from telemetry import story
   7
   8
   9 class NoOpPage(page_module.Page):
  10
  11   def __init__(self, url, page_set):
  12     super(NoOpPage, self).__init__(
  13         url=url,
  14         page_set=page_set,
  15         shared_page_state_class=shared_page_state.SharedMobilePageState)
  16
  17   def RunNavigateSteps(self, action_runner):
  18     super(NoOpPage, self).RunNavigateSteps(action_runner)
  19     # Let load activity settle.
  20     action_runner.Wait(2)
  21
  22   def RunPageInteractions(self, action_runner):
  23     # The default page interaction is simply waiting in an idle state.
  24     with action_runner.CreateInteraction('IdleWaiting'):
  25       action_runner.Wait(5)
  26
  27
  28 class NoOpTouchScrollPage(NoOpPage):
  29   def __init__(self, url, page_set):
  30     super(NoOpTouchScrollPage, self).__init__(url=url, page_set=page_set)
  31
  32   def RunPageInteractions(self, action_runner):
  33     # The noop touch motion should last ~5 seconds.
  34     with action_runner.CreateGestureInteraction('ScrollAction'):
  35       action_runner.ScrollPage(direction='down', use_touch=True,
  36                                speed_in_pixels_per_second=300, distance=1500)
  37
  38
  39 class KeyNoOpCasesPageSet(story.StorySet):
  40
  41   """ Key no-op cases """
  42
  43   def __init__(self):
  44     super(KeyNoOpCasesPageSet, self).__init__()
  45
  46     # Why: An infinite rAF loop which does not modify the page should incur
  47     # minimal activity.
  48     self.AddStory(NoOpPage('file://key_noop_cases/no_op_raf.html', self))
  49
  50     # Why: An inifinite setTimeout loop which does not modify the page should
  51     # incur minimal activity.
  52     self.AddStory(NoOpPage('file://key_noop_cases/no_op_settimeout.html', self))
  53
  54     # Why: Scrolling an empty, unscrollable page should have no expensive side
  55     # effects, as overscroll is suppressed in such cases.
  56     self.AddStory(NoOpTouchScrollPage(
  57         'file://key_noop_cases/no_op_scroll.html', self))
  58
  59     # Why: Feeding a stream of touch events to a no-op handler should be cheap.
  60     self.AddStory(NoOpTouchScrollPage(
  61         'file://key_noop_cases/no_op_touch_handler.html', self))