Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1051 insertions, 0 deletions

diff --git a/gfx/layers/apz/test/gtest/APZTestCommon.h b/gfx/layers/apz/test/gtest/APZTestCommon.h
new file mode 100644
index 0000000000..e4552bdd11
--- /dev/null
+++ b/gfx/layers/apz/test/gtest/APZTestCommon.h
@@ -0,0 +1,1051 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_layers_APZTestCommon_h
+#define mozilla_layers_APZTestCommon_h
+
+/**
+ * Defines a set of mock classes and utility functions/classes for
+ * writing APZ gtests.
+ */
+
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/layers/GeckoContentController.h"
+#include "mozilla/layers/CompositorBridgeParent.h"
+#include "mozilla/layers/APZThreadUtils.h"
+#include "mozilla/layers/MatrixMessage.h"
+#include "mozilla/StaticPrefs_layout.h"
+#include "mozilla/TypedEnumBits.h"
+#include "mozilla/UniquePtr.h"
+#include "apz/src/APZCTreeManager.h"
+#include "apz/src/AsyncPanZoomController.h"
+#include "apz/src/HitTestingTreeNode.h"
+#include "base/task.h"
+#include "gfxPlatform.h"
+#include "TestWRScrollData.h"
+#include "UnitTransforms.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+using namespace mozilla::layers;
+using ::testing::_;
+using ::testing::AtLeast;
+using ::testing::AtMost;
+using ::testing::InSequence;
+using ::testing::MockFunction;
+using ::testing::NiceMock;
+typedef mozilla::layers::GeckoContentController::TapType TapType;
+
+inline TimeStamp GetStartupTime() {
+  static TimeStamp sStartupTime = TimeStamp::Now();
+  return sStartupTime;
+}
+
+inline uint32_t MillisecondsSinceStartup(TimeStamp aTime) {
+  return (aTime - GetStartupTime()).ToMilliseconds();
+}
+
+// Some helper functions for constructing input event objects suitable to be
+// passed either to an APZC (which expects an transformed point), or to an APZTM
+// (which expects an untransformed point). We handle both cases by setting both
+// the transformed and untransformed fields to the same value.
+inline SingleTouchData CreateSingleTouchData(int32_t aIdentifier,
+                                             const ScreenIntPoint& aPoint) {
+  SingleTouchData touch(aIdentifier, aPoint, ScreenSize(0, 0), 0, 0);
+  touch.mLocalScreenPoint = ParentLayerPoint(aPoint.x, aPoint.y);
+  return touch;
+}
+
+// Convenience wrapper for CreateSingleTouchData() that takes loose coordinates.
+inline SingleTouchData CreateSingleTouchData(int32_t aIdentifier,
+                                             ScreenIntCoord aX,
+                                             ScreenIntCoord aY) {
+  return CreateSingleTouchData(aIdentifier, ScreenIntPoint(aX, aY));
+}
+
+inline PinchGestureInput CreatePinchGestureInput(
+    PinchGestureInput::PinchGestureType aType, const ScreenPoint& aFocus,
+    float aCurrentSpan, float aPreviousSpan, TimeStamp timestamp) {
+  ParentLayerPoint localFocus(aFocus.x, aFocus.y);
+  PinchGestureInput result(aType, PinchGestureInput::UNKNOWN, timestamp,
+                           ExternalPoint(0, 0), aFocus, aCurrentSpan,
+                           aPreviousSpan, 0);
+  return result;
+}
+
+template <class SetArg, class Storage>
+class ScopedGfxSetting {
+ public:
+  ScopedGfxSetting(const std::function<SetArg(void)>& aGetPrefFunc,
+                   const std::function<void(SetArg)>& aSetPrefFunc, SetArg aVal)
+      : mSetPrefFunc(aSetPrefFunc) {
+    mOldVal = aGetPrefFunc();
+    aSetPrefFunc(aVal);
+  }
+
+  ~ScopedGfxSetting() { mSetPrefFunc(mOldVal); }
+
+ private:
+  std::function<void(SetArg)> mSetPrefFunc;
+  Storage mOldVal;
+};
+
+static inline constexpr auto kDefaultTouchBehavior =
+    AllowedTouchBehavior::VERTICAL_PAN | AllowedTouchBehavior::HORIZONTAL_PAN |
+    AllowedTouchBehavior::PINCH_ZOOM | AllowedTouchBehavior::ANIMATING_ZOOM;
+
+#define FRESH_PREF_VAR_PASTE(id, line) id##line
+#define FRESH_PREF_VAR_EXPAND(id, line) FRESH_PREF_VAR_PASTE(id, line)
+#define FRESH_PREF_VAR FRESH_PREF_VAR_EXPAND(pref, __LINE__)
+
+#define SCOPED_GFX_PREF_BOOL(prefName, prefValue)                           \
+  ScopedGfxSetting<bool, bool> FRESH_PREF_VAR(                              \
+      [=]() { return Preferences::GetBool(prefName); },                     \
+      [=](bool aPrefValue) { Preferences::SetBool(prefName, aPrefValue); }, \
+      prefValue)
+
+#define SCOPED_GFX_PREF_INT(prefName, prefValue)                              \
+  ScopedGfxSetting<int32_t, int32_t> FRESH_PREF_VAR(                          \
+      [=]() { return Preferences::GetInt(prefName); },                        \
+      [=](int32_t aPrefValue) { Preferences::SetInt(prefName, aPrefValue); }, \
+      prefValue)
+
+#define SCOPED_GFX_PREF_FLOAT(prefName, prefValue)                            \
+  ScopedGfxSetting<float, float> FRESH_PREF_VAR(                              \
+      [=]() { return Preferences::GetFloat(prefName); },                      \
+      [=](float aPrefValue) { Preferences::SetFloat(prefName, aPrefValue); }, \
+      prefValue)
+
+class MockContentController : public GeckoContentController {
+ public:
+  MOCK_METHOD1(NotifyLayerTransforms, void(nsTArray<MatrixMessage>&&));
+  MOCK_METHOD1(RequestContentRepaint, void(const RepaintRequest&));
+  MOCK_METHOD5(HandleTap, void(TapType, const LayoutDevicePoint&, Modifiers,
+                               const ScrollableLayerGuid&, uint64_t));
+  MOCK_METHOD5(NotifyPinchGesture,
+               void(PinchGestureInput::PinchGestureType,
+                    const ScrollableLayerGuid&, const LayoutDevicePoint&,
+                    LayoutDeviceCoord, Modifiers));
+  // Can't use the macros with already_AddRefed :(
+  void PostDelayedTask(already_AddRefed<Runnable> aTask, int aDelayMs) {
+    RefPtr<Runnable> task = aTask;
+  }
+  bool IsRepaintThread() { return NS_IsMainThread(); }
+  void DispatchToRepaintThread(already_AddRefed<Runnable> aTask) {
+    NS_DispatchToMainThread(std::move(aTask));
+  }
+  MOCK_METHOD4(NotifyAPZStateChange,
+               void(const ScrollableLayerGuid& aGuid, APZStateChange aChange,
+                    int aArg, Maybe<uint64_t> aInputBlockId));
+  MOCK_METHOD0(NotifyFlushComplete, void());
+  MOCK_METHOD3(NotifyAsyncScrollbarDragInitiated,
+               void(uint64_t, const ScrollableLayerGuid::ViewID&,
+                    ScrollDirection aDirection));
+  MOCK_METHOD1(NotifyAsyncScrollbarDragRejected,
+               void(const ScrollableLayerGuid::ViewID&));
+  MOCK_METHOD1(NotifyAsyncAutoscrollRejected,
+               void(const ScrollableLayerGuid::ViewID&));
+  MOCK_METHOD1(CancelAutoscroll, void(const ScrollableLayerGuid&));
+  MOCK_METHOD2(NotifyScaleGestureComplete,
+               void(const ScrollableLayerGuid&, float aScale));
+  MOCK_METHOD4(UpdateOverscrollVelocity,
+               void(const ScrollableLayerGuid&, float, float, bool));
+  MOCK_METHOD4(UpdateOverscrollOffset,
+               void(const ScrollableLayerGuid&, float, float, bool));
+};
+
+class MockContentControllerDelayed : public MockContentController {
+ public:
+  MockContentControllerDelayed()
+      : mTime(SampleTime::FromTest(GetStartupTime())) {}
+
+  const TimeStamp& Time() { return mTime.Time(); }
+  const SampleTime& GetSampleTime() { return mTime; }
+
+  void AdvanceByMillis(int aMillis) {
+    AdvanceBy(TimeDuration::FromMilliseconds(aMillis));
+  }
+
+  void AdvanceBy(const TimeDuration& aIncrement) {
+    SampleTime target = mTime + aIncrement;
+    while (mTaskQueue.Length() > 0 && mTaskQueue[0].second <= target) {
+      RunNextDelayedTask();
+    }
+    mTime = target;
+  }
+
+  void PostDelayedTask(already_AddRefed<Runnable> aTask, int aDelayMs) {
+    RefPtr<Runnable> task = aTask;
+    SampleTime runAtTime = mTime + TimeDuration::FromMilliseconds(aDelayMs);
+    int insIndex = mTaskQueue.Length();
+    while (insIndex > 0) {
+      if (mTaskQueue[insIndex - 1].second <= runAtTime) {
+        break;
+      }
+      insIndex--;
+    }
+    mTaskQueue.InsertElementAt(insIndex, std::make_pair(task, runAtTime));
+  }
+
+  // Run all the tasks in the queue, returning the number of tasks
+  // run. Note that if a task queues another task while running, that
+  // new task will not be run. Therefore, there may be still be tasks
+  // in the queue after this function is called. Only when the return
+  // value is 0 is the queue guaranteed to be empty.
+  int RunThroughDelayedTasks() {
+    nsTArray<std::pair<RefPtr<Runnable>, SampleTime>> runQueue =
+        std::move(mTaskQueue);
+    int numTasks = runQueue.Length();
+    for (int i = 0; i < numTasks; i++) {
+      mTime = runQueue[i].second;
+      runQueue[i].first->Run();
+
+      // Deleting the task is important in order to release the reference to
+      // the callee object.
+      runQueue[i].first = nullptr;
+    }
+    return numTasks;
+  }
+
+ private:
+  void RunNextDelayedTask() {
+    std::pair<RefPtr<Runnable>, SampleTime> next = mTaskQueue[0];
+    mTaskQueue.RemoveElementAt(0);
+    mTime = next.second;
+    next.first->Run();
+    // Deleting the task is important in order to release the reference to
+    // the callee object.
+    next.first = nullptr;
+  }
+
+  // The following array is sorted by timestamp (tasks are inserted in order by
+  // timestamp).
+  nsTArray<std::pair<RefPtr<Runnable>, SampleTime>> mTaskQueue;
+  SampleTime mTime;
+};
+
+class TestAPZCTreeManager : public APZCTreeManager {
+ public:
+  explicit TestAPZCTreeManager(MockContentControllerDelayed* aMcc,
+                               UniquePtr<IAPZHitTester> aHitTester = nullptr)
+      : APZCTreeManager(LayersId{0}, std::move(aHitTester)), mcc(aMcc) {}
+
+  RefPtr<InputQueue> GetInputQueue() const { return mInputQueue; }
+
+  void ClearContentController() { mcc = nullptr; }
+
+  /**
+   * This function is not currently implemented.
+   * See bug 1468804 for more information.
+   **/
+  void CancelAnimation() { EXPECT_TRUE(false); }
+
+  APZEventResult ReceiveInputEvent(
+      InputData& aEvent,
+      InputBlockCallback&& aCallback = InputBlockCallback()) override {
+    APZEventResult result =
+        APZCTreeManager::ReceiveInputEvent(aEvent, std::move(aCallback));
+    if (aEvent.mInputType == PANGESTURE_INPUT &&
+        // In the APZCTreeManager::ReceiveInputEvent some type of pan gesture
+        // events are marked as `mHandledByAPZ = false` (e.g. with Ctrl key
+        // modifier which causes reflow zoom), in such cases the events will
+        // never be processed by InputQueue so we shouldn't try to invoke
+        // AllowsSwipe() here.
+        aEvent.AsPanGestureInput().mHandledByAPZ &&
+        aEvent.AsPanGestureInput().AllowsSwipe()) {
+      SetBrowserGestureResponse(result.mInputBlockId,
+                                BrowserGestureResponse::NotConsumed);
+    }
+    return result;
+  }
+
+ protected:
+  AsyncPanZoomController* NewAPZCInstance(
+      LayersId aLayersId, GeckoContentController* aController) override;
+
+  SampleTime GetFrameTime() override { return mcc->GetSampleTime(); }
+
+ private:
+  RefPtr<MockContentControllerDelayed> mcc;
+};
+
+class TestAsyncPanZoomController : public AsyncPanZoomController {
+ public:
+  TestAsyncPanZoomController(LayersId aLayersId,
+                             MockContentControllerDelayed* aMcc,
+                             TestAPZCTreeManager* aTreeManager,
+                             GestureBehavior aBehavior = DEFAULT_GESTURES)
+      : AsyncPanZoomController(aLayersId, aTreeManager,
+                               aTreeManager->GetInputQueue(), aMcc, aBehavior),
+        mWaitForMainThread(false),
+        mcc(aMcc) {}
+
+  APZEventResult ReceiveInputEvent(
+      InputData& aEvent,
+      const Maybe<nsTArray<uint32_t>>& aTouchBehaviors = Nothing()) {
+    // This is a function whose signature matches exactly the ReceiveInputEvent
+    // on APZCTreeManager. This allows us to templates for functions like
+    // TouchDown, TouchUp, etc so that we can reuse the code for dispatching
+    // events into both APZC and APZCTM.
+    APZEventResult result = GetInputQueue()->ReceiveInputEvent(
+        this, TargetConfirmationFlags{!mWaitForMainThread}, aEvent,
+        aTouchBehaviors);
+
+    if (aEvent.mInputType == PANGESTURE_INPUT &&
+        aEvent.AsPanGestureInput().AllowsSwipe()) {
+      GetInputQueue()->SetBrowserGestureResponse(
+          result.mInputBlockId, BrowserGestureResponse::NotConsumed);
+    }
+    return result;
+  }
+
+  void ContentReceivedInputBlock(uint64_t aInputBlockId, bool aPreventDefault) {
+    GetInputQueue()->ContentReceivedInputBlock(aInputBlockId, aPreventDefault);
+  }
+
+  void ConfirmTarget(uint64_t aInputBlockId) {
+    RefPtr<AsyncPanZoomController> target = this;
+    GetInputQueue()->SetConfirmedTargetApzc(aInputBlockId, target);
+  }
+
+  void SetAllowedTouchBehavior(uint64_t aInputBlockId,
+                               const nsTArray<TouchBehaviorFlags>& aBehaviors) {
+    GetInputQueue()->SetAllowedTouchBehavior(aInputBlockId, aBehaviors);
+  }
+
+  void SetFrameMetrics(const FrameMetrics& metrics) {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    Metrics() = metrics;
+  }
+
+  void SetScrollMetadata(const ScrollMetadata& aMetadata) {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    mScrollMetadata = aMetadata;
+  }
+
+  FrameMetrics& GetFrameMetrics() {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    return mScrollMetadata.GetMetrics();
+  }
+
+  ScrollMetadata& GetScrollMetadata() {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    return mScrollMetadata;
+  }
+
+  const FrameMetrics& GetFrameMetrics() const {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    return mScrollMetadata.GetMetrics();
+  }
+
+  using AsyncPanZoomController::GetOverscrollAmount;
+  using AsyncPanZoomController::GetVelocityVector;
+
+  void AssertStateIsReset() const {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    EXPECT_EQ(NOTHING, mState);
+  }
+
+  void AssertStateIsFling() const {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    EXPECT_EQ(FLING, mState);
+  }
+
+  void AssertStateIsSmoothScroll() const {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    EXPECT_EQ(SMOOTH_SCROLL, mState);
+  }
+
+  void AssertStateIsSmoothMsdScroll() const {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    EXPECT_EQ(SMOOTHMSD_SCROLL, mState);
+  }
+
+  void AssertStateIsPanningLockedY() {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    EXPECT_EQ(PANNING_LOCKED_Y, mState);
+  }
+
+  void AssertStateIsPanningLockedX() {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    EXPECT_EQ(PANNING_LOCKED_X, mState);
+  }
+
+  void AssertStateIsPanning() {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    EXPECT_EQ(PANNING, mState);
+  }
+
+  void AssertStateIsPanMomentum() {
+    RecursiveMutexAutoLock lock(mRecursiveMutex);
+    EXPECT_EQ(PAN_MOMENTUM, mState);
+  }
+
+  void SetAxisLocked(ScrollDirections aDirections, bool aLockValue) {
+    if (aDirections.contains(ScrollDirection::eVertical)) {
+      mY.SetAxisLocked(aLockValue);
+    }
+    if (aDirections.contains(ScrollDirection::eHorizontal)) {
+      mX.SetAxisLocked(aLockValue);
+    }
+  }
+
+  void AssertNotAxisLocked() const {
+    EXPECT_FALSE(mY.IsAxisLocked());
+    EXPECT_FALSE(mX.IsAxisLocked());
+  }
+
+  void AssertAxisLocked(ScrollDirection aDirection) const {
+    switch (aDirection) {
+      case ScrollDirection::eHorizontal:
+        EXPECT_TRUE(mY.IsAxisLocked());
+        EXPECT_FALSE(mX.IsAxisLocked());
+        break;
+      case ScrollDirection::eVertical:
+        EXPECT_TRUE(mX.IsAxisLocked());
+        EXPECT_FALSE(mY.IsAxisLocked());
+        break;
+      default:
+        FAIL() << "input direction must be either vertical or horizontal";
+    }
+  }
+
+  void AdvanceAnimationsUntilEnd(
+      const TimeDuration& aIncrement = TimeDuration::FromMilliseconds(10)) {
+    while (AdvanceAnimations(mcc->GetSampleTime())) {
+      mcc->AdvanceBy(aIncrement);
+    }
+  }
+
+  bool SampleContentTransformForFrame(
+      AsyncTransform* aOutTransform, ParentLayerPoint& aScrollOffset,
+      const TimeDuration& aIncrement = TimeDuration::FromMilliseconds(0)) {
+    mcc->AdvanceBy(aIncrement);
+    bool ret = AdvanceAnimations(mcc->GetSampleTime());
+    if (aOutTransform) {
+      *aOutTransform =
+          GetCurrentAsyncTransform(AsyncPanZoomController::eForHitTesting);
+    }
+    aScrollOffset =
+        GetCurrentAsyncScrollOffset(AsyncPanZoomController::eForHitTesting);
+    return ret;
+  }
+
+  CSSPoint GetCompositedScrollOffset() const {
+    return GetCurrentAsyncScrollOffset(
+               AsyncPanZoomController::eForCompositing) /
+           GetFrameMetrics().GetZoom();
+  }
+
+  void SetWaitForMainThread() { mWaitForMainThread = true; }
+
+  bool IsOverscrollAnimationRunning() const {
+    return mState == PanZoomState::OVERSCROLL_ANIMATION;
+  }
+
+ private:
+  bool mWaitForMainThread;
+  MockContentControllerDelayed* mcc;
+};
+
+class APZCTesterBase : public ::testing::Test {
+ public:
+  APZCTesterBase() { mcc = new NiceMock<MockContentControllerDelayed>(); }
+
+  void SetUp() override {
+    gfxPlatform::GetPlatform();
+    // This pref is changed in Pan() without using SCOPED_GFX_PREF
+    // because the modified value needs to be in place until the touch
+    // events are processed, which may not happen until the input queue
+    // is flushed in TearDown(). So, we save and restore its value here.
+    mTouchStartTolerance = StaticPrefs::apz_touch_start_tolerance();
+  }
+
+  void TearDown() override {
+    Preferences::SetFloat("apz.touch_start_tolerance", mTouchStartTolerance);
+  }
+
+  enum class PanOptions {
+    None = 0,
+    KeepFingerDown = 0x1,
+    /*
+     * Do not adjust the touch-start coordinates to overcome the touch-start
+     * tolerance threshold. If this option is passed, it's up to the caller
+     * to pass in coordinates that are sufficient to overcome the touch-start
+     * tolerance *and* cause the desired amount of scrolling.
+     */
+    ExactCoordinates = 0x2,
+    NoFling = 0x4
+  };
+
+  enum class PinchOptions {
+    None = 0,
+    LiftFinger1 = 0x1,
+    LiftFinger2 = 0x2,
+    /*
+     * The bitwise OR result of (LiftFinger1 | LiftFinger2).
+     * Defined explicitly here because it is used as the default
+     * argument for PinchWithTouchInput which is defined BEFORE the
+     * definition of operator| for this class.
+     */
+    LiftBothFingers = 0x3
+  };
+
+  template <class InputReceiver>
+  APZEventResult Tap(const RefPtr<InputReceiver>& aTarget,
+                     const ScreenIntPoint& aPoint, TimeDuration aTapLength,
+                     nsEventStatus (*aOutEventStatuses)[2] = nullptr,
+                     uint64_t* aOutInputBlockId = nullptr);
+
+  template <class InputReceiver>
+  void TapAndCheckStatus(const RefPtr<InputReceiver>& aTarget,
+                         const ScreenIntPoint& aPoint, TimeDuration aTapLength);
+
+  template <class InputReceiver>
+  void Pan(const RefPtr<InputReceiver>& aTarget,
+           const ScreenIntPoint& aTouchStart, const ScreenIntPoint& aTouchEnd,
+           PanOptions aOptions = PanOptions::None,
+           nsTArray<uint32_t>* aAllowedTouchBehaviors = nullptr,
+           nsEventStatus (*aOutEventStatuses)[4] = nullptr,
+           uint64_t* aOutInputBlockId = nullptr);
+
+  /*
+   * A version of Pan() that only takes y coordinates rather than (x, y) points
+   * for the touch start and end points, and uses 10 for the x coordinates.
+   * This is for convenience, as most tests only need to pan in one direction.
+   */
+  template <class InputReceiver>
+  void Pan(const RefPtr<InputReceiver>& aTarget, int aTouchStartY,
+           int aTouchEndY, PanOptions aOptions = PanOptions::None,
+           nsTArray<uint32_t>* aAllowedTouchBehaviors = nullptr,
+           nsEventStatus (*aOutEventStatuses)[4] = nullptr,
+           uint64_t* aOutInputBlockId = nullptr);
+
+  /*
+   * Dispatches mock touch events to the apzc and checks whether apzc properly
+   * consumed them and triggered scrolling behavior.
+   */
+  template <class InputReceiver>
+  void PanAndCheckStatus(const RefPtr<InputReceiver>& aTarget, int aTouchStartY,
+                         int aTouchEndY, bool aExpectConsumed,
+                         nsTArray<uint32_t>* aAllowedTouchBehaviors,
+                         uint64_t* aOutInputBlockId = nullptr);
+
+  template <class InputReceiver>
+  void DoubleTap(const RefPtr<InputReceiver>& aTarget,
+                 const ScreenIntPoint& aPoint,
+                 nsEventStatus (*aOutEventStatuses)[4] = nullptr,
+                 uint64_t (*aOutInputBlockIds)[2] = nullptr);
+
+  template <class InputReceiver>
+  void DoubleTapAndCheckStatus(const RefPtr<InputReceiver>& aTarget,
+                               const ScreenIntPoint& aPoint,
+                               uint64_t (*aOutInputBlockIds)[2] = nullptr);
+
+  template <class InputReceiver>
+  void PinchWithTouchInput(
+      const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aFocus,
+      const ScreenIntPoint& aSecondFocus, float aScale, int& inputId,
+      nsTArray<uint32_t>* aAllowedTouchBehaviors = nullptr,
+      nsEventStatus (*aOutEventStatuses)[4] = nullptr,
+      uint64_t* aOutInputBlockId = nullptr,
+      PinchOptions aOptions = PinchOptions::LiftBothFingers,
+      bool aVertical = false);
+
+  // Pinch with one focus point. Zooms in place with no panning
+  template <class InputReceiver>
+  void PinchWithTouchInput(
+      const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aFocus,
+      float aScale, int& inputId,
+      nsTArray<uint32_t>* aAllowedTouchBehaviors = nullptr,
+      nsEventStatus (*aOutEventStatuses)[4] = nullptr,
+      uint64_t* aOutInputBlockId = nullptr,
+      PinchOptions aOptions = PinchOptions::LiftBothFingers,
+      bool aVertical = false);
+
+  template <class InputReceiver>
+  void PinchWithTouchInputAndCheckStatus(
+      const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aFocus,
+      float aScale, int& inputId, bool aShouldTriggerPinch,
+      nsTArray<uint32_t>* aAllowedTouchBehaviors);
+
+  template <class InputReceiver>
+  void PinchWithPinchInput(const RefPtr<InputReceiver>& aTarget,
+                           const ScreenIntPoint& aFocus,
+                           const ScreenIntPoint& aSecondFocus, float aScale,
+                           nsEventStatus (*aOutEventStatuses)[3] = nullptr);
+
+  template <class InputReceiver>
+  void PinchWithPinchInputAndCheckStatus(const RefPtr<InputReceiver>& aTarget,
+                                         const ScreenIntPoint& aFocus,
+                                         float aScale,
+                                         bool aShouldTriggerPinch);
+
+ protected:
+  RefPtr<MockContentControllerDelayed> mcc;
+
+ private:
+  float mTouchStartTolerance;
+};
+
+MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(APZCTesterBase::PanOptions)
+MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(APZCTesterBase::PinchOptions)
+
+template <class InputReceiver>
+APZEventResult APZCTesterBase::Tap(const RefPtr<InputReceiver>& aTarget,
+                                   const ScreenIntPoint& aPoint,
+                                   TimeDuration aTapLength,
+                                   nsEventStatus (*aOutEventStatuses)[2],
+                                   uint64_t* aOutInputBlockId) {
+  APZEventResult touchDownResult = TouchDown(aTarget, aPoint, mcc->Time());
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[0] = touchDownResult.GetStatus();
+  }
+  if (aOutInputBlockId) {
+    *aOutInputBlockId = touchDownResult.mInputBlockId;
+  }
+  mcc->AdvanceBy(aTapLength);
+
+  // If touch-action is enabled then simulate the allowed touch behaviour
+  // notification that the main thread is supposed to deliver.
+  if (touchDownResult.GetStatus() != nsEventStatus_eConsumeNoDefault) {
+    SetDefaultAllowedTouchBehavior(aTarget, touchDownResult.mInputBlockId);
+  }
+
+  APZEventResult touchUpResult = TouchUp(aTarget, aPoint, mcc->Time());
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[1] = touchUpResult.GetStatus();
+  }
+  return touchDownResult;
+}
+
+template <class InputReceiver>
+void APZCTesterBase::TapAndCheckStatus(const RefPtr<InputReceiver>& aTarget,
+                                       const ScreenIntPoint& aPoint,
+                                       TimeDuration aTapLength) {
+  nsEventStatus statuses[2];
+  Tap(aTarget, aPoint, aTapLength, &statuses);
+  EXPECT_EQ(nsEventStatus_eConsumeDoDefault, statuses[0]);
+  EXPECT_EQ(nsEventStatus_eConsumeDoDefault, statuses[1]);
+}
+
+template <class InputReceiver>
+void APZCTesterBase::Pan(const RefPtr<InputReceiver>& aTarget,
+                         const ScreenIntPoint& aTouchStart,
+                         const ScreenIntPoint& aTouchEnd, PanOptions aOptions,
+                         nsTArray<uint32_t>* aAllowedTouchBehaviors,
+                         nsEventStatus (*aOutEventStatuses)[4],
+                         uint64_t* aOutInputBlockId) {
+  // Reduce the move tolerance to a tiny value.
+  // We can't use a scoped pref because this value might be read at some later
+  // time when the events are actually processed, rather than when we deliver
+  // them.
+  const float touchStartTolerance = 0.1f;
+  const float panThreshold = touchStartTolerance * aTarget->GetDPI();
+  Preferences::SetFloat("apz.touch_start_tolerance", touchStartTolerance);
+  Preferences::SetFloat("apz.touch_move_tolerance", 0.0f);
+  int overcomeTouchToleranceX = 0;
+  int overcomeTouchToleranceY = 0;
+  if (!(aOptions & PanOptions::ExactCoordinates)) {
+    // Have the direction of the adjustment to overcome the touch tolerance
+    // match the direction of the entire gesture, otherwise we run into
+    // trouble such as accidentally activating the axis lock.
+    if (aTouchStart.x != aTouchEnd.x && aTouchStart.y != aTouchEnd.y) {
+      // Tests that need to avoid rounding error here can arrange for
+      // panThreshold to be 10 (by setting the DPI to 100), which makes sure
+      // that these are the legs in a Pythagorean triple where panThreshold is
+      // the hypotenuse. Watch out for changes of APZCPinchTester::mDPI.
+      overcomeTouchToleranceX = panThreshold / 10 * 6;
+      overcomeTouchToleranceY = panThreshold / 10 * 8;
+    } else if (aTouchStart.x != aTouchEnd.x) {
+      overcomeTouchToleranceX = panThreshold;
+    } else if (aTouchStart.y != aTouchEnd.y) {
+      overcomeTouchToleranceY = panThreshold;
+    }
+  }
+
+  const TimeDuration TIME_BETWEEN_TOUCH_EVENT =
+      TimeDuration::FromMilliseconds(20);
+
+  // Even if the caller doesn't care about the block id, we need it to set the
+  // allowed touch behaviour below, so make sure aOutInputBlockId is non-null.
+  uint64_t blockId;
+  if (!aOutInputBlockId) {
+    aOutInputBlockId = &blockId;
+  }
+
+  // Make sure the move is large enough to not be handled as a tap
+  APZEventResult result =
+      TouchDown(aTarget,
+                ScreenIntPoint(aTouchStart.x + overcomeTouchToleranceX,
+                               aTouchStart.y + overcomeTouchToleranceY),
+                mcc->Time());
+  if (aOutInputBlockId) {
+    *aOutInputBlockId = result.mInputBlockId;
+  }
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[0] = result.GetStatus();
+  }
+
+  mcc->AdvanceBy(TIME_BETWEEN_TOUCH_EVENT);
+
+  // Allowed touch behaviours must be set after sending touch-start.
+  if (result.GetStatus() != nsEventStatus_eConsumeNoDefault) {
+    if (aAllowedTouchBehaviors) {
+      EXPECT_EQ(1UL, aAllowedTouchBehaviors->Length());
+      aTarget->SetAllowedTouchBehavior(*aOutInputBlockId,
+                                       *aAllowedTouchBehaviors);
+    } else {
+      SetDefaultAllowedTouchBehavior(aTarget, *aOutInputBlockId);
+    }
+  }
+
+  result = TouchMove(aTarget, aTouchStart, mcc->Time());
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[1] = result.GetStatus();
+  }
+
+  mcc->AdvanceBy(TIME_BETWEEN_TOUCH_EVENT);
+
+  const int numSteps = 3;
+  auto stepVector = (aTouchEnd - aTouchStart) / numSteps;
+  for (int k = 1; k < numSteps; k++) {
+    auto stepPoint = aTouchStart + stepVector * k;
+    Unused << TouchMove(aTarget, stepPoint, mcc->Time());
+
+    mcc->AdvanceBy(TIME_BETWEEN_TOUCH_EVENT);
+  }
+
+  result = TouchMove(aTarget, aTouchEnd, mcc->Time());
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[2] = result.GetStatus();
+  }
+
+  mcc->AdvanceBy(TIME_BETWEEN_TOUCH_EVENT);
+
+  if (!(aOptions & PanOptions::KeepFingerDown)) {
+    result = TouchUp(aTarget, aTouchEnd, mcc->Time());
+  } else {
+    result.SetStatusAsIgnore();
+  }
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[3] = result.GetStatus();
+  }
+
+  if ((aOptions & PanOptions::NoFling)) {
+    aTarget->CancelAnimation();
+  }
+
+  // Don't increment the time here. Animations started on touch-up, such as
+  // flings, are affected by elapsed time, and we want to be able to sample
+  // them immediately after they start, without time having elapsed.
+}
+
+template <class InputReceiver>
+void APZCTesterBase::Pan(const RefPtr<InputReceiver>& aTarget, int aTouchStartY,
+                         int aTouchEndY, PanOptions aOptions,
+                         nsTArray<uint32_t>* aAllowedTouchBehaviors,
+                         nsEventStatus (*aOutEventStatuses)[4],
+                         uint64_t* aOutInputBlockId) {
+  Pan(aTarget, ScreenIntPoint(10, aTouchStartY), ScreenIntPoint(10, aTouchEndY),
+      aOptions, aAllowedTouchBehaviors, aOutEventStatuses, aOutInputBlockId);
+}
+
+template <class InputReceiver>
+void APZCTesterBase::PanAndCheckStatus(
+    const RefPtr<InputReceiver>& aTarget, int aTouchStartY, int aTouchEndY,
+    bool aExpectConsumed, nsTArray<uint32_t>* aAllowedTouchBehaviors,
+    uint64_t* aOutInputBlockId) {
+  nsEventStatus statuses[4];  // down, move, move, up
+  Pan(aTarget, aTouchStartY, aTouchEndY, PanOptions::None,
+      aAllowedTouchBehaviors, &statuses, aOutInputBlockId);
+
+  EXPECT_EQ(nsEventStatus_eConsumeDoDefault, statuses[0]);
+
+  nsEventStatus touchMoveStatus;
+  if (aExpectConsumed) {
+    touchMoveStatus = nsEventStatus_eConsumeDoDefault;
+  } else {
+    touchMoveStatus = nsEventStatus_eIgnore;
+  }
+  EXPECT_EQ(touchMoveStatus, statuses[1]);
+  EXPECT_EQ(touchMoveStatus, statuses[2]);
+}
+
+template <class InputReceiver>
+void APZCTesterBase::DoubleTap(const RefPtr<InputReceiver>& aTarget,
+                               const ScreenIntPoint& aPoint,
+                               nsEventStatus (*aOutEventStatuses)[4],
+                               uint64_t (*aOutInputBlockIds)[2]) {
+  APZEventResult result = TouchDown(aTarget, aPoint, mcc->Time());
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[0] = result.GetStatus();
+  }
+  if (aOutInputBlockIds) {
+    (*aOutInputBlockIds)[0] = result.mInputBlockId;
+  }
+  mcc->AdvanceByMillis(10);
+
+  // If touch-action is enabled then simulate the allowed touch behaviour
+  // notification that the main thread is supposed to deliver.
+  if (result.GetStatus() != nsEventStatus_eConsumeNoDefault) {
+    SetDefaultAllowedTouchBehavior(aTarget, result.mInputBlockId);
+  }
+
+  result = TouchUp(aTarget, aPoint, mcc->Time());
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[1] = result.GetStatus();
+  }
+  mcc->AdvanceByMillis(10);
+  result = TouchDown(aTarget, aPoint, mcc->Time());
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[2] = result.GetStatus();
+  }
+  if (aOutInputBlockIds) {
+    (*aOutInputBlockIds)[1] = result.mInputBlockId;
+  }
+  mcc->AdvanceByMillis(10);
+
+  if (result.GetStatus() != nsEventStatus_eConsumeNoDefault) {
+    SetDefaultAllowedTouchBehavior(aTarget, result.mInputBlockId);
+  }
+
+  result = TouchUp(aTarget, aPoint, mcc->Time());
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[3] = result.GetStatus();
+  }
+}
+
+template <class InputReceiver>
+void APZCTesterBase::DoubleTapAndCheckStatus(
+    const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aPoint,
+    uint64_t (*aOutInputBlockIds)[2]) {
+  nsEventStatus statuses[4];
+  DoubleTap(aTarget, aPoint, &statuses, aOutInputBlockIds);
+  EXPECT_EQ(nsEventStatus_eConsumeDoDefault, statuses[0]);
+  EXPECT_EQ(nsEventStatus_eConsumeDoDefault, statuses[1]);
+  EXPECT_EQ(nsEventStatus_eConsumeDoDefault, statuses[2]);
+  EXPECT_EQ(nsEventStatus_eConsumeDoDefault, statuses[3]);
+}
+
+template <class InputReceiver>
+void APZCTesterBase::PinchWithTouchInput(
+    const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aFocus,
+    float aScale, int& inputId, nsTArray<uint32_t>* aAllowedTouchBehaviors,
+    nsEventStatus (*aOutEventStatuses)[4], uint64_t* aOutInputBlockId,
+    PinchOptions aOptions, bool aVertical) {
+  // Perform a pinch gesture with the same start & end focus point
+  PinchWithTouchInput(aTarget, aFocus, aFocus, aScale, inputId,
+                      aAllowedTouchBehaviors, aOutEventStatuses,
+                      aOutInputBlockId, aOptions, aVertical);
+}
+
+template <class InputReceiver>
+void APZCTesterBase::PinchWithTouchInput(
+    const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aFocus,
+    const ScreenIntPoint& aSecondFocus, float aScale, int& inputId,
+    nsTArray<uint32_t>* aAllowedTouchBehaviors,
+    nsEventStatus (*aOutEventStatuses)[4], uint64_t* aOutInputBlockId,
+    PinchOptions aOptions, bool aVertical) {
+  // Having pinch coordinates in float type may cause problems with
+  // high-precision scale values since SingleTouchData accepts integer value.
+  // But for trivial tests it should be ok.
+  const float pinchLength = 100.0;
+  const float pinchLengthScaled = pinchLength * aScale;
+
+  const float pinchLengthX = aVertical ? 0 : pinchLength;
+  const float pinchLengthScaledX = aVertical ? 0 : pinchLengthScaled;
+  const float pinchLengthY = aVertical ? pinchLength : 0;
+  const float pinchLengthScaledY = aVertical ? pinchLengthScaled : 0;
+
+  // Even if the caller doesn't care about the block id, we need it to set the
+  // allowed touch behaviour below, so make sure aOutInputBlockId is non-null.
+  uint64_t blockId;
+  if (!aOutInputBlockId) {
+    aOutInputBlockId = &blockId;
+  }
+
+  const TimeDuration TIME_BETWEEN_TOUCH_EVENT =
+      TimeDuration::FromMilliseconds(20);
+
+  MultiTouchInput mtiStart =
+      MultiTouchInput(MultiTouchInput::MULTITOUCH_START, 0, mcc->Time(), 0);
+  mtiStart.mTouches.AppendElement(CreateSingleTouchData(inputId, aFocus));
+  mtiStart.mTouches.AppendElement(CreateSingleTouchData(inputId + 1, aFocus));
+  APZEventResult result;
+  result = aTarget->ReceiveInputEvent(mtiStart);
+  if (aOutInputBlockId) {
+    *aOutInputBlockId = result.mInputBlockId;
+  }
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[0] = result.GetStatus();
+  }
+
+  mcc->AdvanceBy(TIME_BETWEEN_TOUCH_EVENT);
+
+  if (aAllowedTouchBehaviors) {
+    EXPECT_EQ(2UL, aAllowedTouchBehaviors->Length());
+    aTarget->SetAllowedTouchBehavior(*aOutInputBlockId,
+                                     *aAllowedTouchBehaviors);
+  } else {
+    SetDefaultAllowedTouchBehavior(aTarget, *aOutInputBlockId, 2);
+  }
+
+  ScreenIntPoint pinchStartPoint1(aFocus.x - int32_t(pinchLengthX),
+                                  aFocus.y - int32_t(pinchLengthY));
+  ScreenIntPoint pinchStartPoint2(aFocus.x + int32_t(pinchLengthX),
+                                  aFocus.y + int32_t(pinchLengthY));
+
+  MultiTouchInput mtiMove1 =
+      MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, 0, mcc->Time(), 0);
+  mtiMove1.mTouches.AppendElement(
+      CreateSingleTouchData(inputId, pinchStartPoint1));
+  mtiMove1.mTouches.AppendElement(
+      CreateSingleTouchData(inputId + 1, pinchStartPoint2));
+  result = aTarget->ReceiveInputEvent(mtiMove1);
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[1] = result.GetStatus();
+  }
+
+  mcc->AdvanceBy(TIME_BETWEEN_TOUCH_EVENT);
+
+  // Pinch instantly but move in steps.
+  const int numSteps = 3;
+  auto stepVector = (aSecondFocus - aFocus) / numSteps;
+  for (int k = 1; k < numSteps; k++) {
+    ScreenIntPoint stepFocus = aFocus + stepVector * k;
+    ScreenIntPoint stepPoint1(stepFocus.x - int32_t(pinchLengthScaledX),
+                              stepFocus.y - int32_t(pinchLengthScaledY));
+    ScreenIntPoint stepPoint2(stepFocus.x + int32_t(pinchLengthScaledX),
+                              stepFocus.y + int32_t(pinchLengthScaledY));
+    MultiTouchInput mtiMoveStep =
+        MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, 0, mcc->Time(), 0);
+    mtiMoveStep.mTouches.AppendElement(
+        CreateSingleTouchData(inputId, stepPoint1));
+    mtiMoveStep.mTouches.AppendElement(
+        CreateSingleTouchData(inputId + 1, stepPoint2));
+    Unused << aTarget->ReceiveInputEvent(mtiMoveStep);
+
+    mcc->AdvanceBy(TIME_BETWEEN_TOUCH_EVENT);
+  }
+
+  ScreenIntPoint pinchEndPoint1(aSecondFocus.x - int32_t(pinchLengthScaledX),
+                                aSecondFocus.y - int32_t(pinchLengthScaledY));
+  ScreenIntPoint pinchEndPoint2(aSecondFocus.x + int32_t(pinchLengthScaledX),
+                                aSecondFocus.y + int32_t(pinchLengthScaledY));
+
+  MultiTouchInput mtiMove2 =
+      MultiTouchInput(MultiTouchInput::MULTITOUCH_MOVE, 0, mcc->Time(), 0);
+  mtiMove2.mTouches.AppendElement(
+      CreateSingleTouchData(inputId, pinchEndPoint1));
+  mtiMove2.mTouches.AppendElement(
+      CreateSingleTouchData(inputId + 1, pinchEndPoint2));
+  result = aTarget->ReceiveInputEvent(mtiMove2);
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[2] = result.GetStatus();
+  }
+
+  if (aOptions & (PinchOptions::LiftFinger1 | PinchOptions::LiftFinger2)) {
+    mcc->AdvanceBy(TIME_BETWEEN_TOUCH_EVENT);
+
+    MultiTouchInput mtiEnd =
+        MultiTouchInput(MultiTouchInput::MULTITOUCH_END, 0, mcc->Time(), 0);
+    if (aOptions & PinchOptions::LiftFinger1) {
+      mtiEnd.mTouches.AppendElement(
+          CreateSingleTouchData(inputId, pinchEndPoint1));
+    }
+    if (aOptions & PinchOptions::LiftFinger2) {
+      mtiEnd.mTouches.AppendElement(
+          CreateSingleTouchData(inputId + 1, pinchEndPoint2));
+    }
+    result = aTarget->ReceiveInputEvent(mtiEnd);
+    if (aOutEventStatuses) {
+      (*aOutEventStatuses)[3] = result.GetStatus();
+    }
+  }
+
+  inputId += 2;
+}
+
+template <class InputReceiver>
+void APZCTesterBase::PinchWithTouchInputAndCheckStatus(
+    const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aFocus,
+    float aScale, int& inputId, bool aShouldTriggerPinch,
+    nsTArray<uint32_t>* aAllowedTouchBehaviors) {
+  nsEventStatus statuses[4];  // down, move, move, up
+  PinchWithTouchInput(aTarget, aFocus, aScale, inputId, aAllowedTouchBehaviors,
+                      &statuses);
+
+  nsEventStatus expectedMoveStatus = aShouldTriggerPinch
+                                         ? nsEventStatus_eConsumeDoDefault
+                                         : nsEventStatus_eIgnore;
+  EXPECT_EQ(nsEventStatus_eConsumeDoDefault, statuses[0]);
+  EXPECT_EQ(expectedMoveStatus, statuses[1]);
+  EXPECT_EQ(expectedMoveStatus, statuses[2]);
+}
+
+template <class InputReceiver>
+void APZCTesterBase::PinchWithPinchInput(
+    const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aFocus,
+    const ScreenIntPoint& aSecondFocus, float aScale,
+    nsEventStatus (*aOutEventStatuses)[3]) {
+  const TimeDuration TIME_BETWEEN_PINCH_INPUT =
+      TimeDuration::FromMilliseconds(50);
+
+  auto event = CreatePinchGestureInput(PinchGestureInput::PINCHGESTURE_START,
+                                       aFocus, 10.0, 10.0, mcc->Time());
+  APZEventResult actual = aTarget->ReceiveInputEvent(event);
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[0] = actual.GetStatus();
+  }
+  mcc->AdvanceBy(TIME_BETWEEN_PINCH_INPUT);
+
+  event =
+      CreatePinchGestureInput(PinchGestureInput::PINCHGESTURE_SCALE,
+                              aSecondFocus, 10.0 * aScale, 10.0, mcc->Time());
+  actual = aTarget->ReceiveInputEvent(event);
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[1] = actual.GetStatus();
+  }
+  mcc->AdvanceBy(TIME_BETWEEN_PINCH_INPUT);
+
+  event =
+      CreatePinchGestureInput(PinchGestureInput::PINCHGESTURE_END, aSecondFocus,
+                              10.0 * aScale, 10.0 * aScale, mcc->Time());
+  actual = aTarget->ReceiveInputEvent(event);
+  if (aOutEventStatuses) {
+    (*aOutEventStatuses)[2] = actual.GetStatus();
+  }
+}
+
+template <class InputReceiver>
+void APZCTesterBase::PinchWithPinchInputAndCheckStatus(
+    const RefPtr<InputReceiver>& aTarget, const ScreenIntPoint& aFocus,
+    float aScale, bool aShouldTriggerPinch) {
+  nsEventStatus statuses[3];  // scalebegin, scale, scaleend
+  PinchWithPinchInput(aTarget, aFocus, aFocus, aScale, &statuses);
+
+  nsEventStatus expectedStatus = aShouldTriggerPinch
+                                     ? nsEventStatus_eConsumeDoDefault
+                                     : nsEventStatus_eIgnore;
+  EXPECT_EQ(expectedStatus, statuses[0]);
+  EXPECT_EQ(expectedStatus, statuses[1]);
+}
+
+inline FrameMetrics TestFrameMetrics() {
+  FrameMetrics fm;
+
+  fm.SetDisplayPort(CSSRect(0, 0, 10, 10));
+  fm.SetCompositionBounds(ParentLayerRect(0, 0, 10, 10));
+  fm.SetScrollableRect(CSSRect(0, 0, 100, 100));
+
+  return fm;
+}
+
+#endif  // mozilla_layers_APZTestCommon_h