Add unittests for action_runner.BeginInteraction and action_runner.EndInteraction.

tools/telemetry/telemetry/page/actions/action_runner_unittest.py

Index: tools/telemetry/telemetry/page/actions/action_runner_unittest.py
diff --git a/tools/telemetry/telemetry/page/actions/action_runner_unittest.py b/tools/telemetry/telemetry/page/actions/action_runner_unittest.py
new file mode 100644
index 0000000000000000000000000000000000000000..71980709cf86ca6a46682af504864617b216f1a3
--- /dev/null
+++ b/tools/telemetry/telemetry/page/actions/action_runner_unittest.py
@@ -0,0 +1,34 @@
+# Copyright (c) 2014 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.backends.chrome import tracing_backend
+from telemetry.core.timeline import model
+from telemetry.page.actions import action_runner as action_runner_module
+# pylint: disable=W0401,W0614
+from telemetry.page.actions.all_page_actions import *
+from telemetry.unittest import tab_test_case
+from telemetry.web_perf import timeline_interaction_record as tir_module
+
+
+class ActionRunnerTest(tab_test_case.TabTestCase):
+  def testIssuingInteractionRecord(self):
+    action_runner = action_runner_module.ActionRunner(self._tab)
+    self.Navigate('interaction_enabled_page.html')
+    action_runner.RunAction(WaitAction({'seconds': 1}))
+    self._browser.StartTracing(tracing_backend.DEFAULT_TRACE_CATEGORIES)
+    action_runner.BeginInteraction('TestInteraction', [tir_module.IS_SMOOTH])
+    action_runner.EndInteraction('TestInteraction', [tir_module.IS_SMOOTH])
+    trace_data = self._browser.StopTracing()
+    timeline_model = model.TimelineModel(trace_data)
+
+    records = []
+    renderer_thread = timeline_model.GetRendererThreadFromTab(self._tab)
+    for event in renderer_thread.async_slices:
+      if not tir_module.IsTimelineInteractionRecord(event.name):
+        continue
+      records.append(tir_module.TimelineInteractionRecord.FromEvent(event))
+    self.assertEqual(1, len(records),
+                     'Fail to issue the interaction record on tracing timeline.'
+                     ' Trace data:\n%s' % repr(trace_data.EventData()))
+    self.assertEqual('TestInteraction', records[0].logical_name)
+    self.assertTrue(records[0].is_smooth)