content/browser/renderer_host/input/scroll_latency_browsertest.cc - chromium/src - Git at Google

 // Copyright 2017 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 "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/test/histogram_tester.h"
 #include "content/browser/renderer_host/input/synthetic_gesture.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 #include "content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/input/synthetic_gesture_params.h"
 #include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/shell/browser/shell.h"

 namespace {

 const char kDataURL[] =
     "data:text/html;charset=utf-8,"
     "<!DOCTYPE html>"
     "<html>"
     "<head>"
     "<title>Mouse wheel latency histograms reported.</title>"
     "<script src=\"../../resources/testharness.js\"></script>"
     "<script src=\"../../resources/testharnessreport.js\"></script>"
     "<style>"
     "body {"
     "  height:3000px;"
     "}"
     "</style>"
     "</head>"
     "<body>"
     "</body>"
     "</html>";

 }  // namespace

 namespace content {

 class ScrollLatencyBrowserTest : public ContentBrowserTest {
  public:
   ScrollLatencyBrowserTest() : loop_(base::MessageLoop::TYPE_UI) {}
   ~ScrollLatencyBrowserTest() override {}

   RenderWidgetHostImpl* GetWidgetHost() {
     return RenderWidgetHostImpl::From(
         shell()->web_contents()->GetRenderViewHost()->GetWidget());
   }

   // TODO(tdresser): Find a way to avoid sleeping like this. See
   // crbug.com/405282 for details.
   void GiveItSomeTime() {
     base::RunLoop run_loop;
     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
         FROM_HERE, run_loop.QuitClosure(),
         base::TimeDelta::FromMillisecondsD(10));
     run_loop.Run();
   }

   void WaitAFrame() {
     while (!GetWidgetHost()->ScheduleComposite())
       GiveItSomeTime();
     frame_observer_->Wait();
   }

  protected:
   void LoadURL() {
     const GURL data_url(kDataURL);
     NavigateToURL(shell(), data_url);

     RenderWidgetHostImpl* host = GetWidgetHost();
     host->GetView()->SetSize(gfx::Size(400, 400));

     frame_observer_ = base::MakeUnique<MainThreadFrameObserver>(
         shell()->web_contents()->GetRenderViewHost()->GetWidget());

     // Wait a frame to make sure the page has renderered.
     WaitAFrame();
     frame_observer_.reset();
   }

   // Generate a single wheel tick, scrolling by |distance|. This will perform a
   // smooth scroll on platforms which support it.
   void DoSmoothWheelScroll(const gfx::Vector2d& distance) {
     blink::WebGestureEvent event =
         SyntheticWebGestureEventBuilder::BuildScrollBegin(
             distance.x(), -distance.y(),
             blink::WebGestureDevice::kWebGestureDeviceTouchpad, 1);
     event.data.scroll_begin.delta_hint_units =
         blink::WebGestureEvent::ScrollUnits::kPixels;
     GetWidgetHost()->ForwardGestureEvent(event);

     blink::WebGestureEvent event2 =
         SyntheticWebGestureEventBuilder::BuildScrollUpdate(
             distance.x(), -distance.y(), 0,
             blink::WebGestureDevice::kWebGestureDeviceTouchpad);
     event2.data.scroll_update.delta_units =
         blink::WebGestureEvent::ScrollUnits::kPixels;
     GetWidgetHost()->ForwardGestureEvent(event2);
   }

  private:
   base::MessageLoop loop_;
   base::RunLoop runner_;
   std::unique_ptr<MainThreadFrameObserver> frame_observer_;

   DISALLOW_COPY_AND_ASSIGN(ScrollLatencyBrowserTest);
 };

 // Perform a smooth wheel scroll, and verify that our end-to-end wheel latency
 // metric is recorded. See crbug.com/599910 for details.
 IN_PROC_BROWSER_TEST_F(ScrollLatencyBrowserTest, SmoothWheelScroll) {
   LoadURL();

   base::HistogramTester histogram_tester;
   DoSmoothWheelScroll(gfx::Vector2d(0, 100));

   size_t num_samples = 0;

   while (num_samples == 0) {
     num_samples =
         histogram_tester
             .GetAllSamples(
                 "Event.Latency.ScrollBegin.Wheel.TimeToScrollUpdateSwapBegin2")
             .size();
     GiveItSomeTime();
   }
 }

 }  // namespace content
	// Copyright 2017 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 "base/bind.h"
	#include "base/message_loop/message_loop.h"
	#include "base/run_loop.h"
	#include "base/test/histogram_tester.h"
	#include "content/browser/renderer_host/input/synthetic_gesture.h"
	#include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
	#include "content/browser/renderer_host/input/synthetic_gesture_target.h"
	#include "content/browser/renderer_host/input/synthetic_smooth_scroll_gesture.h"
	#include "content/browser/renderer_host/render_widget_host_impl.h"
	#include "content/browser/web_contents/web_contents_impl.h"
	#include "content/common/input/synthetic_gesture_params.h"
	#include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
	#include "content/public/browser/render_view_host.h"
	#include "content/public/browser/render_widget_host_view.h"
	#include "content/public/test/browser_test_utils.h"
	#include "content/public/test/content_browser_test.h"
	#include "content/public/test/content_browser_test_utils.h"
	#include "content/shell/browser/shell.h"

	namespace {

	const char kDataURL[] =
	"data:text/html;charset=utf-8,"
	"<!DOCTYPE html>"
	"<html>"
	"<head>"
	"<title>Mouse wheel latency histograms reported.</title>"
	"<script src=\"../../resources/testharness.js\"></script>"
	"<script src=\"../../resources/testharnessreport.js\"></script>"
	"<style>"
	"body {"
	" height:3000px;"
	"}"
	"</style>"
	"</head>"
	"<body>"
	"</body>"
	"</html>";

	} // namespace

	namespace content {

	class ScrollLatencyBrowserTest : public ContentBrowserTest {
	public:
	ScrollLatencyBrowserTest() : loop_(base::MessageLoop::TYPE_UI) {}
	~ScrollLatencyBrowserTest() override {}

	RenderWidgetHostImpl* GetWidgetHost() {
	return RenderWidgetHostImpl::From(
	shell()->web_contents()->GetRenderViewHost()->GetWidget());
	}

	// TODO(tdresser): Find a way to avoid sleeping like this. See
	// crbug.com/405282 for details.
	void GiveItSomeTime() {
	base::RunLoop run_loop;
	base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
	FROM_HERE, run_loop.QuitClosure(),
	base::TimeDelta::FromMillisecondsD(10));
	run_loop.Run();
	}

	void WaitAFrame() {
	while (!GetWidgetHost()->ScheduleComposite())
	GiveItSomeTime();
	frame_observer_->Wait();
	}

	protected:
	void LoadURL() {
	const GURL data_url(kDataURL);
	NavigateToURL(shell(), data_url);

	RenderWidgetHostImpl* host = GetWidgetHost();
	host->GetView()->SetSize(gfx::Size(400, 400));

	frame_observer_ = base::MakeUnique<MainThreadFrameObserver>(
	shell()->web_contents()->GetRenderViewHost()->GetWidget());

	// Wait a frame to make sure the page has renderered.
	WaitAFrame();
	frame_observer_.reset();
	}

	// Generate a single wheel tick, scrolling by \|distance\|. This will perform a
	// smooth scroll on platforms which support it.
	void DoSmoothWheelScroll(const gfx::Vector2d& distance) {
	blink::WebGestureEvent event =
	SyntheticWebGestureEventBuilder::BuildScrollBegin(
	distance.x(), -distance.y(),
	blink::WebGestureDevice::kWebGestureDeviceTouchpad, 1);
	event.data.scroll_begin.delta_hint_units =
	blink::WebGestureEvent::ScrollUnits::kPixels;
	GetWidgetHost()->ForwardGestureEvent(event);

	blink::WebGestureEvent event2 =
	SyntheticWebGestureEventBuilder::BuildScrollUpdate(
	distance.x(), -distance.y(), 0,
	blink::WebGestureDevice::kWebGestureDeviceTouchpad);
	event2.data.scroll_update.delta_units =
	blink::WebGestureEvent::ScrollUnits::kPixels;
	GetWidgetHost()->ForwardGestureEvent(event2);
	}

	private:
	base::MessageLoop loop_;
	base::RunLoop runner_;
	std::unique_ptr<MainThreadFrameObserver> frame_observer_;

	DISALLOW_COPY_AND_ASSIGN(ScrollLatencyBrowserTest);
	};

	// Perform a smooth wheel scroll, and verify that our end-to-end wheel latency
	// metric is recorded. See crbug.com/599910 for details.
	IN_PROC_BROWSER_TEST_F(ScrollLatencyBrowserTest, SmoothWheelScroll) {
	LoadURL();

	base::HistogramTester histogram_tester;
	DoSmoothWheelScroll(gfx::Vector2d(0, 100));

	size_t num_samples = 0;

	while (num_samples == 0) {
	num_samples =
	histogram_tester
	.GetAllSamples(
	"Event.Latency.ScrollBegin.Wheel.TimeToScrollUpdateSwapBegin2")
	.size();
	GiveItSomeTime();
	}
	}

	} // namespace content