Introduce animation frame tasks

third_party/WebKit/Source/core/dom/ScriptedAnimationControllerTest.cpp

Index: third_party/WebKit/Source/core/dom/ScriptedAnimationControllerTest.cpp
diff --git a/third_party/WebKit/Source/core/dom/ScriptedAnimationControllerTest.cpp b/third_party/WebKit/Source/core/dom/ScriptedAnimationControllerTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..1830b53f5dd203ce78ecb1454d9ddf26f6216fe8
--- /dev/null
+++ b/third_party/WebKit/Source/core/dom/ScriptedAnimationControllerTest.cpp
@@ -0,0 +1,184 @@
+// Copyright 2016 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 "core/dom/ScriptedAnimationController.h"
+
+#include "core/dom/Document.h"
+#include "core/dom/FrameRequestCallback.h"
+#include "core/events/Event.h"
+#include "core/events/EventListener.h"
+#include "core/events/EventTarget.h"
+#include "core/testing/DummyPageHolder.h"
+#include "platform/heap/Handle.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "wtf/Functional.h"
+#include <memory>
+
+namespace blink {
+
+class ScriptedAnimationControllerTest : public ::testing::Test {
+ protected:
+  void SetUp() override;
+
+  Document& document() const { return m_dummyPageHolder->document(); }
+  ScriptedAnimationController& controller() { return *m_controller; }
+
+ private:
+  std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
+  Persistent<ScriptedAnimationController> m_controller;
+};
+
+void ScriptedAnimationControllerTest::SetUp() {
+  m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
+
+  // Note: The document doesn't know about this ScriptedAnimationController
+  // instance, and will create another if
+  // Document::ensureScriptedAnimationController is called.
+  m_controller =
+      wrapPersistent(ScriptedAnimationController::create(&document()));
+}
+
+namespace {
+
+class TaskOrderObserver {
+ public:
+  std::unique_ptr<WTF::Closure> createTask(int id) {
+    return WTF::bind(&TaskOrderObserver::runTask, unretained(this), id);
+  }
+  const Vector<int>& order() const { return m_order; }
+
+ private:
+  void runTask(int id) { m_order.append(id); }
+  Vector<int> m_order;
+};
+
+}  // anonymous namespace
+
+TEST_F(ScriptedAnimationControllerTest, EnqueueOneTask) {
+  TaskOrderObserver observer;
+
+  controller().enqueueTask(observer.createTask(1));
+  EXPECT_EQ(0u, observer.order().size());
+
+  controller().serviceScriptedAnimations(0);
+  EXPECT_EQ(1u, observer.order().size());
+  EXPECT_EQ(1, observer.order()[0]);
+}
+
+TEST_F(ScriptedAnimationControllerTest, EnqueueTwoTasks) {
+  TaskOrderObserver observer;
+
+  controller().enqueueTask(observer.createTask(1));
+  controller().enqueueTask(observer.createTask(2));
+  EXPECT_EQ(0u, observer.order().size());
+
+  controller().serviceScriptedAnimations(0);
+  EXPECT_EQ(2u, observer.order().size());
+  EXPECT_EQ(1, observer.order()[0]);
+  EXPECT_EQ(2, observer.order()[1]);
+}
+
+namespace {
+
+void enqueueTask(ScriptedAnimationController* controller,
+                 TaskOrderObserver* observer,
+                 int id) {
+  controller->enqueueTask(observer->createTask(id));
+}
+
+}  // anonymous namespace
+
+// A task enqueued while running tasks should not be run immediately after, but
+// the next time tasks are run.
+TEST_F(ScriptedAnimationControllerTest, EnqueueWithinTask) {
+  TaskOrderObserver observer;
+
+  controller().enqueueTask(observer.createTask(1));
+  controller().enqueueTask(WTF::bind(
+      &enqueueTask, wrapPersistent(&controller()), unretained(&observer), 2));
+  controller().enqueueTask(observer.createTask(3));
+  EXPECT_EQ(0u, observer.order().size());
+
+  controller().serviceScriptedAnimations(0);
+  EXPECT_EQ(2u, observer.order().size());
+  EXPECT_EQ(1, observer.order()[0]);
+  EXPECT_EQ(3, observer.order()[1]);
+
+  controller().serviceScriptedAnimations(0);
+  EXPECT_EQ(3u, observer.order().size());
+  EXPECT_EQ(1, observer.order()[0]);
+  EXPECT_EQ(3, observer.order()[1]);
+  EXPECT_EQ(2, observer.order()[2]);
+}
+
+namespace {
+
+class RunTaskEventListener final : public EventListener {
+ public:
+  RunTaskEventListener(std::unique_ptr<WTF::Closure> task)
+      : EventListener(CPPEventListenerType), m_task(std::move(task)) {}
+  void handleEvent(ExecutionContext*, Event*) override { (*m_task)(); }
+  bool operator==(const EventListener& other) const override {
+    return this == &other;
+  }
+
+ private:
+  std::unique_ptr<WTF::Closure> m_task;
+};
+
+}  // anonymous namespace
+
+// Tasks should be run after events are dispatched, even if they were enqueued
+// first.
+TEST_F(ScriptedAnimationControllerTest, EnqueueTaskAndEvent) {
+  TaskOrderObserver observer;
+
+  controller().enqueueTask(observer.createTask(1));
+  document().addEventListener("test",
+                              new RunTaskEventListener(observer.createTask(2)));
+  Event* event = Event::create("test");
+  event->setTarget(&document());
+  controller().enqueueEvent(event);
+  EXPECT_EQ(0u, observer.order().size());
+
+  controller().serviceScriptedAnimations(0);
+  EXPECT_EQ(2u, observer.order().size());
+  EXPECT_EQ(2, observer.order()[0]);
+  EXPECT_EQ(1, observer.order()[1]);
+}
+
+namespace {
+
+class RunTaskCallback final : public FrameRequestCallback {
+ public:
+  RunTaskCallback(std::unique_ptr<WTF::Closure> task)
+      : m_task(std::move(task)) {}
+  void handleEvent(double) override { (*m_task)(); }
+
+ private:
+  std::unique_ptr<WTF::Closure> m_task;
+};
+
+}  // anonymous namespace
+
+// Animation frame callbacks should be run after tasks, even if they were
+// enqueued first.
+TEST_F(ScriptedAnimationControllerTest, RegisterCallbackAndEnqueueTask) {
+  TaskOrderObserver observer;
+
+  Event* event = Event::create("test");
+  event->setTarget(&document());
+
+  controller().registerCallback(new RunTaskCallback(observer.createTask(1)));
+  controller().enqueueTask(observer.createTask(2));
+  EXPECT_EQ(0u, observer.order().size());
+
+  controller().serviceScriptedAnimations(0);
+  EXPECT_EQ(2u, observer.order().size());
+  EXPECT_EQ(2, observer.order()[0]);
+  EXPECT_EQ(1, observer.order()[1]);
+}
+
+}  // namespace blink