Add Telemetry media loop action.

tools/telemetry/telemetry/page/actions/loop_unittest.py

Index: tools/telemetry/telemetry/page/actions/loop_unittest.py
diff --git a/tools/telemetry/telemetry/page/actions/loop_unittest.py b/tools/telemetry/telemetry/page/actions/loop_unittest.py
new file mode 100644
index 0000000000000000000000000000000000000000..2b0ae881d79e9d0f10ee774951702a862e40d26f
--- /dev/null
+++ b/tools/telemetry/telemetry/page/actions/loop_unittest.py
@@ -0,0 +1,60 @@
+# Copyright 2013 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 telemetry.core import util
+from telemetry.page.actions import loop
+from telemetry.unittest import tab_test_case
+
+AUDIO_1_LOOP_CHECK = 'window.__hasEventCompleted("#audio_1", "loop");'
+VIDEO_1_LOOP_CHECK = 'window.__hasEventCompleted("#video_1", "loop");'
+
+
+class LoopActionTest(tab_test_case.TabTestCase):
+
+  def setUp(self):
+    tab_test_case.TabTestCase.setUp(self)
+    self._browser.SetHTTPServerDirectories(util.GetUnittestDataDir())
+    self._tab.Navigate(self._browser.http_server.UrlOf('video_test.html'))
+    self._tab.WaitForDocumentReadyStateToBeComplete()
+
+  def testLoopWithNoSelector(self):
+    """Tests that with no selector Loop action loops first media element."""
+    data = {'selector': '#video_1', 'loop_count': 2}
+    action = loop.LoopAction(data)
+    action.WillRunAction(None, self._tab)
+    action.RunAction(None, self._tab, None)
+    # Assert only first video has played.
+    self.assertTrue(self._tab.EvaluateJavaScript(VIDEO_1_LOOP_CHECK))
+    self.assertFalse(self._tab.EvaluateJavaScript(AUDIO_1_LOOP_CHECK))
+
+  def testLoopWithAllSelector(self):
+    """Tests that Loop action loops all video elements with selector='all'."""
+    data = {'selector': 'all', 'loop_count': 2}
+    action = loop.LoopAction(data)
+    action.WillRunAction(None, self._tab)
+    # Both videos not playing before running action.
+    self.assertFalse(self._tab.EvaluateJavaScript(VIDEO_1_LOOP_CHECK))
+    self.assertFalse(self._tab.EvaluateJavaScript(AUDIO_1_LOOP_CHECK))
+    action.RunAction(None, self._tab, None)
+    # Assert all media elements played.
+    self.assertTrue(self._tab.EvaluateJavaScript(VIDEO_1_LOOP_CHECK))
+    self.assertTrue(self._tab.EvaluateJavaScript(AUDIO_1_LOOP_CHECK))
+
+  def testLoopWaitForLoopTimeout(self):
+    """Tests that wait_for_loop timeouts if video does not loop."""
+    data = {'selector': '#video_1',
+            'wait_timeout': 1,
+            'loop_count': 2}
+    action = loop.LoopAction(data)
+    action.WillRunAction(None, self._tab)
+    self.assertFalse(self._tab.EvaluateJavaScript(VIDEO_1_LOOP_CHECK))
+    self.assertRaises(util.TimeoutException, action.RunAction, None, self._tab,
+                      None)
+
+  def testLoopWithoutLoopCount(self):
+    """Tests that loop action fails with no loop count."""
+    data = {}
+    action = loop.LoopAction(data)
+    action.WillRunAction(None, self._tab)
+    self.assertRaises(AssertionError, action.RunAction, None, self._tab, None)