Ensure fixed amount of scrolling in infinite scroll stories.

tools/perf/page_sets/mobile_infinite_scroll_cases.py

-# Copyright 2016 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.
-from page_sets import mobile_facebook_page
-from telemetry.page import page as page_module
-from telemetry.page import shared_page_state
-from telemetry import story
-
-TIME_TO_WAIT_BEFORE_STARTING_IN_SECONDS = 5
-SCROLL_TIMEOUT_IN_SECONDS = 120
-
-# TODO(ulan): Remove this once crbug.com/541508 is fixed.
-STARTUP_SCRIPT = '''
-    window.WebSocket = undefined;
-    window.Worker = undefined;
-    window.performance = undefined;'''
-
-def _ScrollAction(action_runner, scroll_amount, delay, repeat):
-  with action_runner.CreateInteraction('Begin'):
-    action_runner.tab.browser.DumpMemory()
-  with action_runner.CreateInteraction('Scrolling'):
-    action_runner.RepeatableBrowserDrivenScroll(
-      y_scroll_distance_ratio=scroll_amount,
-      repeat_delay_ms=delay,
-      repeat_count=repeat,
-      timeout=SCROLL_TIMEOUT_IN_SECONDS)
-  with action_runner.CreateInteraction('End'):
-    action_runner.tab.browser.DumpMemory()
-
-def _WaitAction(action_runner):
-  with action_runner.CreateInteraction('Load'):
-    action_runner.WaitForJavaScriptCondition(
-      'document.body != null && '
-      'document.body.scrollHeight > window.innerHeight && '
-      '!document.body.addEventListener("touchstart", function() {})')
-  with action_runner.CreateInteraction('Wait'):
-    action_runner.Wait(TIME_TO_WAIT_BEFORE_STARTING_IN_SECONDS)
-  with action_runner.CreateInteraction('GC'):
-    action_runner.ForceGarbageCollection()
-
-class MobileInfiniteScrollPage(page_module.Page):
-  def __init__(self, url, page_set, name, scroll_amount, delay, repeat,
-               credentials=None):
-    super(MobileInfiniteScrollPage, self).__init__(
-        url=url, page_set=page_set, name=name,
-        shared_page_state_class=shared_page_state.SharedPageState,
-       credentials_path='data/credentials.json')
-    self.credentials = credentials
-    self.script_to_evaluate_on_commit = STARTUP_SCRIPT
-    self.scroll_amount = scroll_amount
-    self.delay = delay
-    self.repeat = repeat
-
-  def RunPageInteractions(self, action_runner):
-    _WaitAction(action_runner)
-    _ScrollAction(action_runner, self.scroll_amount, self.delay,
-                       self.repeat)
-
-class MobileInfiniteScrollFacebookPage(mobile_facebook_page.MobileFacebookPage):
-  def __init__(self, url, page_set, name, scroll_amount, delay, repeat):
-    super(MobileInfiniteScrollFacebookPage, self).__init__(
-        url=url, page_set=page_set,
-        shared_page_state_class=shared_page_state.SharedPageState,
-        name=name)
-    self.script_to_evaluate_on_commit = STARTUP_SCRIPT
-    self.scroll_amount = scroll_amount
-    self.delay = delay
-    self.repeat = repeat
-
-  def RunPageInteractions(self, action_runner):
-    _WaitAction(action_runner)
-    _ScrollAction(action_runner, self.scroll_amount, self.delay,
-                       self.repeat)
-
-class MobileInfiniteScrollPageSet(story.StorySet):
-  """ Top mobile pages that can be scrolled for many pages. """
-  def __init__(self):
-    super(MobileInfiniteScrollPageSet, self).__init__(
-        archive_data_file='data/mobile_infinite_scroll.json',
-        cloud_storage_bucket=story.PARTNER_BUCKET)
-    # The scroll distance is chosen such that the page can be scrolled
-    # continuously through the test without hitting the end of the page.
-    SCROLL_FAR = 60
-    SCROLL_PAGE = 1
-    pages = [
-        ('https://m.facebook.com/shakira', 'facebook', SCROLL_FAR, 0, 0),
-        ('https://www.pinterest.com/all', 'pinterest', SCROLL_FAR, 0, 0),
-        ('http://techcrunch.tumblr.com/', 'tumblr', SCROLL_FAR, 0, 0),
-        ('https://www.flickr.com/explore', 'flickr', SCROLL_FAR, 0, 0),
-        ('https://meta.discourse.org/t/the-official-discourse-tags-plugin-discourse-tagging/26482',
-         'discourse', SCROLL_PAGE, 10, 30)
-    ]
-    self.AddStory(
-      MobileInfiniteScrollFacebookPage(pages[0][0], self, pages[0][1],
-                                       pages[0][2], pages[0][3], pages[0][4]))
-    for (url, name, scroll_amount, delay, repeat) in pages[1:]:
-      self.AddStory(
-        MobileInfiniteScrollPage(url, self, name, scroll_amount, delay, repeat))