composited_scrolling_browsertest.cc

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <tuple>
#include <utility>

#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/numerics/angle_conversions.h"
#include "base/run_loop.h"
#include "base/strings/utf_string_conversions.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/scoped_feature_list.h"
#include "build/build_config.h"
#include "cc/base/features.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.h"
#include "content/common/input/synthetic_gesture_params.h"
#include "content/common/input/synthetic_smooth_scroll_gesture.h"
#include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/common/content_switches.h"
#include "content/public/test/browser_test.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/public/test/hit_test_region_observer.h"
#include "content/public/test/test_utils.h"
#include "content/shell/browser/shell.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/public/common/switches.h"

namespace {

const char kCompositedScrollingDataURL[] = …;

}  // namespace

namespace content {


class CompositedScrollingBrowserTest : public ContentBrowserTest { … };

// Verify transforming a scroller doesn't prevent it from scrolling. See
// crbug.com/543655 for a case where this was broken.
// Disabled on MacOS because it doesn't support touch input.
// Disabled on Android due to flakiness, see https://crbug.com/376668.
// Flaky on Windows: crbug.com/804009
#if BUILDFLAG(IS_MAC) || BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_WIN)
#define MAYBE_Scroll3DTransformedScroller …
#else
#define MAYBE_Scroll3DTransformedScroller …
#endif
IN_PROC_BROWSER_TEST_F(CompositedScrollingBrowserTest,
                       MAYBE_Scroll3DTransformedScroller) { … }

static constexpr unsigned kCompositedScroll = …;
static constexpr unsigned kRasterInducingScroll = …;

class CompositedScrollingMetricTest
    : public CompositedScrollingBrowserTest,
      public testing::WithParamInterface<unsigned> { … };

INSTANTIATE_TEST_SUITE_P(…);

// Tests the functionality of the histogram tracking composited vs main thread
// scrolls.
IN_PROC_BROWSER_TEST_P(CompositedScrollingMetricTest,
                       RecordCorrectScrollingThread) { … }

// Tests the composited vs main thread scrolling histogram in the presence of
// blocking event handlers.
IN_PROC_BROWSER_TEST_P(CompositedScrollingMetricTest, BlockingEventHandlers) { … }

// Tests the composited vs main thread scrolling histogram in the presence of
// passive event handlers. These should behave the same as the case without any
// event handlers at all.

// TODO(crbug.com/335028963): Re-enable this test
#if BUILDFLAG(IS_MAC)
#define MAYBE_PassiveEventHandlers …
#else
#define MAYBE_PassiveEventHandlers …
#endif
IN_PROC_BROWSER_TEST_P(CompositedScrollingMetricTest,
                       MAYBE_PassiveEventHandlers) { … }

}  // namespace content
chromium/content/browser/renderer_host/input/composited_scrolling_browsertest.cc
