1 files changed, 38 insertions, 0 deletions
diff --git a/gfx/layers/apz/test/gtest/MockHitTester.cpp b/gfx/layers/apz/test/gtest/MockHitTester.cpp
new file mode 100644
index 0000000000..025866ca65
--- /dev/null
+++ b/gfx/layers/apz/test/gtest/MockHitTester.cpp
@@ -0,0 +1,38 @@
+/* -*- 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/. */
+
+#include "MockHitTester.h"
+#include "apz/src/AsyncPanZoomController.h"
+#include "mozilla/layers/ScrollableLayerGuid.h"
+
+namespace mozilla::layers {
+
+IAPZHitTester::HitTestResult MockHitTester::GetAPZCAtPoint(
+    const ScreenPoint& aHitTestPoint,
+    const RecursiveMutexAutoLock& aProofOfTreeLock) {
+  MOZ_ASSERT(!mQueuedResults.empty());
+  HitTestResult result = std::move(mQueuedResults.front());
+  mQueuedResults.pop();
+  return result;
+}
+
+void MockHitTester::QueueHitResult(ScrollableLayerGuid::ViewID aScrollId,
+                                   gfx::CompositorHitTestInfo aHitInfo) {
+  LayersId layersId = GetRootLayersId();  // currently this is all the tests use
+  RefPtr<HitTestingTreeNode> node =
+      GetTargetNode(ScrollableLayerGuid(layersId, 0, aScrollId),
+                    ScrollableLayerGuid::EqualsIgnoringPresShell);
+  MOZ_ASSERT(node);
+  AsyncPanZoomController* apzc = node->GetApzc();
+  MOZ_ASSERT(apzc);
+  HitTestResult result;
+  result.mTargetApzc = apzc;
+  result.mHitResult = aHitInfo;
+  result.mLayersId = layersId;
+  mQueuedResults.push(std::move(result));
+}
+
+}  // namespace mozilla::layers