[System Health] Create first System Health media user stories.

tools/perf/page_sets/system_health/media_stories.py

Index: tools/perf/page_sets/system_health/media_stories.py
diff --git a/tools/perf/page_sets/system_health/media_stories.py b/tools/perf/page_sets/system_health/media_stories.py
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index 0000000000000000000000000000000000000000..79f4bb4e5312e7452ffedb3f746fb428993fb4b7
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+++ b/tools/perf/page_sets/system_health/media_stories.py
@@ -0,0 +1,124 @@
+# 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.system_health import platforms
+from page_sets.system_health import system_health_story
+
+from page_sets.login_helpers import google_login
+from page_sets.login_helpers import pandora_login
+
+
+class _MediaStory(system_health_story.SystemHealthStory):
+  """Abstract base class for media System Health user stories."""
+
+  ABSTRACT_STORY = True
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
+  PLAY_DURATION = 20
+
+  def RunPageInteractions(self, action_runner):
+    self._NavigateToMedia(action_runner)
+    # Play Media.
+    if self.PLAY_ELEMENT:
+      self._WaitForAndClickElement(action_runner, self.PLAY_ELEMENT)
+    self._WaitForPlayTime(action_runner)
+    # Stop media.
+    self._WaitForAndClickElement(action_runner, self.STOP_ELEMENT)
+
+  def _NavigateToMedia(self, action_runner):
+    raise NotImplementedError
+
+  def _WaitForAndClickElement(self, action_runner, element_function):
+    action_runner.WaitForElement(element_function=element_function)
+    action_runner.ClickElement(element_function=element_function)
+
+  def _WaitForPlayTime(self, action_runner):
+    action_runner.Wait(self.PLAY_DURATION)
+    while self._GetTimeInSeconds(action_runner) < self.PLAY_DURATION:
+      action_runner.Wait(
+          self.PLAY_DURATION - self._GetTimeInSeconds(action_runner))
+
+  def _GetTimeInSeconds(self, action_runner):
+    minutes, seconds = action_runner.EvaluateJavaScript(
+        self.TIME_ELEMENT).split(':')

[petrcermak, 2016/09/22 09:50:56]

you should define `TIME_ELEMENT = NotImplemented` at the top of the class. The
same applies to PLAY_ELEMENT and STOP_ELEMENT

[rnephew (Reviews Here), 2016/09/22 16:40:51]

Done.

+    return int(minutes * 60 + seconds)
+
+
+################################################################################
+# Audio stories.
+################################################################################
+
+
+class GooglePlayMusicDesktopStory(_MediaStory):
+  NAME = 'play:media:google_play_music'
+  URL = 'https://music.google.com'
+
+  SEARCH_ELEMENT = 'document.querySelector(".title.fade-out.tooltip")'

[petrcermak, 2016/09/22 09:50:56]

nit: please modify the order of the class constants here (and in the other story
classes below) so that it's:

NAME
URL
constants from _MediaStory
story-specific constants

for example, in this class, TIME_ELEMENT (_MediaStory constant) should be
defined above NAVIGATE_IDENTIFIER (GooglePlayMusicDesktopStory constant).

[rnephew (Reviews Here), 2016/09/22 16:40:51]

Done.

+  PLAY_ELEMENT = (
+      'document.getElementsByClassName("x-scope paper-fab-0")[0]')

[petrcermak, 2016/09/22 09:50:56]

You use "document.getElementByClassName(SELECTOR)[0]" pretty much everywhere,
which leads to unnecessary boilerplate. Could you please define SEARCH_SELECTOR,
PLAY_SELECTOR, STOP_SELECTOR, ... instead and then use
`"document.querySelector(%s)" % selc.SEARCH_SELECTOR` when appropriate?

[rnephew (Reviews Here), 2016/09/22 16:40:51]

Done.

+  STOP_ELEMENT = (
+      'document.getElementsByClassName("style-scope sj-play-button")[0]')
+  NAVIGATE_IDENTIFIER = (

[petrcermak, 2016/09/22 09:50:56]

why is this called "IDENTIFIER" and not "ELEMENT" (inconsistent)?

[rnephew (Reviews Here), 2016/09/22 16:40:51]

Missed when switching everything. Fixed.

+      'document.getElementsByClassName("description tooltip fade-out")[0]')
+  TIME_ELEMENT = 'document.getElementById("time-container-current").innerHTML'

[petrcermak, 2016/09/22 09:50:56]

why don't you use `textContent` instead of `innerHTML`?

[petrcermak, 2016/09/22 09:50:56]

All other ELEMENTs refer to the element, but this refer's to the element's HTML
code (inconsistent). I suggest you use a selector instead (as I recommended in
one of my previous comments) and then just do
`'document.querySelector(%s).textContent' % self.TIME_SELECTOR` instead.

[rnephew (Reviews Here), 2016/09/22 16:40:51]

Didn't know about it, switched to it.

[rnephew (Reviews Here), 2016/09/22 16:40:51]

Done.

+
+
+  def _Login(self, action_runner):
+    google_login.LoginGoogleAccount(action_runner, 'googletest',
+                                    self.credentials_path)
+
+  def _NavigateToMedia(self, action_runner):
+    # Clicks on Today's top hits.
+    self._WaitForAndClickElement(action_runner, self.SEARCH_ELEMENT)
+    # Clicks on playlist.
+    self._WaitForAndClickElement(action_runner, self.NAVIGATE_IDENTIFIER)
+
+  def _GetTimeInSeconds(self, action_runner):

[petrcermak, 2016/09/22 09:50:56]

No need to redefine the method again.

[rnephew (Reviews Here), 2016/09/22 16:40:52]

Done.

+    minutes, seconds = action_runner.EvaluateJavaScript(
+        self.TIME_ELEMENT).split(':')
+    return int(minutes * 60 + seconds)
+
+
+class SoundCloudDesktopStory(_MediaStory):
+  NAME = 'play:media:soundcloud'
+  URL = 'https://soundcloud.com'
+
+  SEARCH_ELEMENT = 'document.getElementsByClassName("headerSearch")[0]'
+  SEARCH_QUERY = 'SSmooth Jazz' # First S for some reason gets ommited.
+  PLAY_ELEMENT = ('document.getElementsByClassName("sc-button-play'
+                  ' playButton sc-button sc-button-xlarge")[0]')
+  STOP_ELEMENT = ('document.getElementsByClassName("playControl '
+                  'playControls__icon sc-ir playing")[0]')
+  TIME_ELEMENT = ('document.getElementsByClassName('
+                  '"playbackTimeline__timePassed")[0].innerHTML')
+
+  def _NavigateToMedia(self, action_runner):
+    self._WaitForAndClickElement(action_runner, self.SEARCH_ELEMENT)
+    action_runner.Wait(1) # Add 1 second wait to make the browsing realistic.
+    action_runner.EnterText(self.SEARCH_QUERY)
+    action_runner.PressKey('Return')
+
+  def _GetTimeInSeconds(self, action_runner):
+    # Format of returned value is:

[petrcermak, 2016/09/22 09:50:56]

Instead of doing this in python, change your TIME_ELEMENT to:

document.querySelector(".playbackTimeline__timePassed >
span[aria-hidden=true]").textContent

You can then reuse the existing implementation

[rnephew (Reviews Here), 2016/09/22 16:40:52]

Done.

+    # <span class="sc-visuallyhidden">Current time: 19 seconds</span>
+    # <span aria-hidden="true">0:19</span>
+    minutes, seconds = action_runner.EvaluateJavaScript(
+        self.TIME_ELEMENT).split(">")[3].split('<')[0].split(':')
+    return int(minutes * 60 + seconds)
+
+
+class PandoraDesktopStory(_MediaStory):
+  NAME = 'play:media:pandora'
+  URL = 'https://pandora.com'
+
+  SEARCH_ELEMENT = 'document.getElementsByClassName("searchInput")[0]'
+  SEARCH_QUERY = None

[petrcermak, 2016/09/22 09:50:56]

no need to define SEARCH_QUERY

[rnephew (Reviews Here), 2016/09/22 16:40:51]

Done.

+  PLAY_ELEMENT = None
+  STOP_ELEMENT = 'document.getElementsByClassName("pauseButton")[0]'
+  TIME_ELEMENT = 'document.getElementsByClassName("elapsedTime")[0].innerHTML'
+
+  def _Login(self, action_runner):
+    pandora_login.LoginAccount(action_runner, 'pandora', self.credentials_path)
+
+  def _NavigateToMedia(self, action_runner):
+    pass # Audio autoplays on Pandora, no need to search.