mus: Forward user activity from window server to detector.

ui/base/user_activity/user_activity_detector_unittest.cc

 // Copyright 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.
 
 #include "ui/base/user_activity/user_activity_detector.h"
 
 #include <memory>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
@@ skipping 190 matching lines @@
   ui::MouseEvent mouse_event(ui::ET_MOUSE_MOVED, gfx::Point(), gfx::Point(),
                              ui::EventTimeForNow(), ui::EF_IS_SYNTHESIZED,
                              ui::EF_NONE);
   OnEvent(&mouse_event);
   EXPECT_FALSE(mouse_event.handled());
   EXPECT_EQ(base::TimeTicks().ToInternalValue(),
             detector_->last_activity_time().ToInternalValue());
   EXPECT_EQ(0, observer_->num_invocations());
 }
 
+// Checks that observers are notified about externally-reported user activity.
+TEST_F(UserActivityDetectorTest, HandleExternalUserActivity) {
+  detector_->HandleExternalUserActivity();
+  EXPECT_EQ(1, observer_->num_invocations());
+  observer_->reset_stats();
+
+  base::TimeDelta advance_delta = base::TimeDelta::FromMilliseconds(
+      UserActivityDetector::kNotifyIntervalMs);
+  AdvanceTime(advance_delta);
+  detector_->HandleExternalUserActivity();
+  EXPECT_EQ(1, observer_->num_invocations());
+  observer_->reset_stats();
+
+  base::TimeDelta half_advance_delta = base::TimeDelta::FromMilliseconds(
+      UserActivityDetector::kNotifyIntervalMs / 2);
+  AdvanceTime(half_advance_delta);
+  detector_->HandleExternalUserActivity();
+  EXPECT_EQ(0, observer_->num_invocations());
+
+  AdvanceTime(half_advance_delta);
+  detector_->HandleExternalUserActivity();
+  EXPECT_EQ(1, observer_->num_invocations());
+}
+
 }  // namespace ui