Record the fraction of the time without user input - Aura only

ui/aura/window_event_dispatcher_unittest.cc

 // 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.
 
 #include "ui/aura/window_event_dispatcher.h"
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/test/histogram_tester.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/client/event_client.h"
 #include "ui/aura/client/focus_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/mus/window_tree_client.h"
 #include "ui/aura/test/aura_test_base.h"
 #include "ui/aura/test/env_test_helper.h"
 #include "ui/aura/test/test_cursor_client.h"
 #include "ui/aura/test/test_screen.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/test/test_windows.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tracker.h"
 #include "ui/base/hit_test.h"
 #include "ui/display/screen.h"
 #include "ui/events/event.h"
 #include "ui/events/event_handler.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/gesture_detection/gesture_configuration.h"
+#include "ui/events/keycodes/dom/dom_code.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/events/test/test_event_handler.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/transform.h"
 
 namespace aura {
 namespace {
 
@@ skipping 2639 matching lines @@
   // The cursor should not be over |w| after changing the device scale factor to
   // 2x. A ET_MOUSE_EXITED event should have been sent to |w|.
   test_screen()->SetDeviceScaleFactor(2.f);
   dispatcher->OnCursorMovedToRootLocation(gfx::Point(11, 11));
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(recorder.HasReceivedEvent(ui::ET_MOUSE_EXITED));
 
   w->RemovePreTargetHandler(&recorder);
 }
 
+// Tests that we correctly report the fraction of time without user input via
+// UMA.
+TEST_P(WindowEventDispatcherTest, FractionOfTimeWithoutUserInputRecorded) {
+  const char* kHistogram = "Event.FractionOfTimeWithoutUserInput";
+  base::HistogramTester tester;
+
+  std::unique_ptr<aura::Window> window(
+      test::CreateTestWindowWithId(1234, root_window()));
+
+  ui::MouseEvent mouse1(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
+                        gfx::Point(10, 10), ui::EventTimeStampFromSeconds(4), 0,
+                        0);
+
+  // To flush the idle fraction reporter, we need to dispatch two events. The
+  // first event causes us to record the previous active period, and the second
+  // flushes the previous active period.
+  ui::MouseEvent mouse2(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
+                        gfx::Point(10, 10), ui::EventTimeStampFromSeconds(16),
+                        0, 0);
+
+  ui::MouseEvent mouse3(ui::ET_MOUSE_MOVED, gfx::Point(10, 10),
+                        gfx::Point(10, 10), ui::EventTimeStampFromSeconds(30),
+                        0, 0);
+
+  DispatchEventUsingWindowDispatcher(&mouse1);
+  DispatchEventUsingWindowDispatcher(&mouse2);
+  DispatchEventUsingWindowDispatcher(&mouse3);
+
+  tester.ExpectTotalCount(kHistogram, 1);
+}
+
 INSTANTIATE_TEST_CASE_P(/* no prefix */,
                         WindowEventDispatcherTest,
                         ::testing::Values(test::BackendType::CLASSIC,
                                           test::BackendType::MUS));
 
 INSTANTIATE_TEST_CASE_P(/* no prefix */,
                         WindowEventDispatcherTestWithMessageLoop,
                         ::testing::Values(test::BackendType::CLASSIC,
                                           test::BackendType::MUS));
 
@@ skipping 175 matching lines @@
   EXPECT_EQ(1, last_event_location_delegate.mouse_event_count());
   EXPECT_EQ(1, last_event_location_delegate.nested_message_loop_count());
   EXPECT_EQ(mouse_location, last_event_location_delegate.last_mouse_location());
 
   // After dispatch the location should fallback to that of the
   // WindowTreeClient, which defaults to 0,0.
   EXPECT_EQ(gfx::Point(0, 0), Env::GetInstance()->last_mouse_location());
 }
 
 }  // namespace aura