Introduce new basic playback test.

chrome/test/functional/media/media_basic_playback.py

+#!/usr/bin/env python
+# Copyright (c) 2012 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.
+
+"""Basic playback test.  Checks playback, seek, and replay based on events.
+
+This test uses the bear videos from the test matrix in h264, vp8, and theora
+formats.
+"""
+import logging
+import os
+
+import pyauto_media
+
+
+# HTML test path; relative to src/chrome/test/data.
+_TEST_HTML_PATH = os.path.join('media', 'html', 'media_basic_playback.html')
+
+
+class MediaConstrainedNetworkPerfTest(pyauto_media.MediaTestBase):
+  """PyAuto test container.  See file doc string for more information."""

[Ami GONE FROM CHROMIUM, 2012/01/25 17:58:48]

Does this comment buy anything?

[DaleCurtis, 2012/01/25 23:59:25]

Just keeps gpylint from complaining.

+
+  def testBasicPlaybackMatrix(self):
+    """Launches HTML test which plays a video until end, seeks, and replays.
+
+    Specifically ensures that after the above sequence of events, the following
+    is true:
+
+        1. 2x playing, 2x ended, 1x seeked, 0x error, and 0x abort events.
+        2. video.currentTime == video.duration.
+    """
+    # Find all bear media w/o video.

[Ami GONE FROM CHROMIUM, 2012/01/25 17:58:48]

Wat?

[DaleCurtis, 2012/01/25 23:59:25]

Done.

+    media_files = self.FindMedia(name='bear', video=True)
+    for media in media_files:
+      logging.debug('Running basic playback test for %s', media)
+
+      self.NavigateToURL('%s?media=%s' % (
+          self.GetFileURLForDataPath(_TEST_HTML_PATH), media))
+
+      # Block until the test finishes and notifies us.  Upon return the value of
+      # video.currentTime == video.duration is provided.
+      self.assertTrue(self.ExecuteJavascript('true;'))

[shadi, 2012/01/25 19:30:04]

Does this wait for the test to end? (I am just familiar with WaitUntil()...)
Is there a time-out?

[DaleCurtis, 2012/01/25 23:59:25]

Yes, the normal PyAuto automation call timeout applies. Every ExecuteJavascript
invocation requires a subsequent window.domAutomationController.send() call.
Here we're waiting for the test to respond back that it's completed.

+
+      events = self.GetDOMValue('events').split(',')
+      counts = [(item, events.count(item)) for item in sorted(set(events))]
+      self.assertEqual(counts, [('ended', 2), ('playing', 2), ('seeked', 1)])
+
+
+if __name__ == '__main__':
+  pyauto_media.Main()