cc: Emulate BeginFrame in OutputSurfaces that don't support it natively

cc/scheduler/vsync_time_source_unittest.cc

-// Copyright 2013 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 "cc/scheduler/vsync_time_source.h"
-
-#include "cc/test/scheduler_test_common.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace cc {
-namespace {
-
-class FakeVSyncProvider : public VSyncProvider {
- public:
-  FakeVSyncProvider() : client_(NULL) {}
-
-  // VSyncProvider implementation.
-  virtual void RequestVSyncNotification(VSyncClient* client) OVERRIDE {
-    client_ = client;
-  }
-
-  bool IsVSyncNotificationEnabled() const { return client_ != NULL; }
-
-  void Trigger(base::TimeTicks frame_time) {
-    if (client_)
-      client_->DidVSync(frame_time);
-  }
-
- private:
-  VSyncClient* client_;
-};
-
-class VSyncTimeSourceTest : public testing::Test {
- public:
-  VSyncTimeSourceTest()
-      : timer_(VSyncTimeSource::Create(
-          &provider_, VSyncTimeSource::DISABLE_ON_NEXT_TICK)) {
-    timer_->SetClient(&client_);
-  }
-
- protected:
-  FakeTimeSourceClient client_;
-  FakeVSyncProvider provider_;
-  scoped_refptr<VSyncTimeSource> timer_;
-};
-
-TEST_F(VSyncTimeSourceTest, TaskPostedAndTickCalled) {
-  EXPECT_FALSE(provider_.IsVSyncNotificationEnabled());
-
-  timer_->SetActive(true);
-  EXPECT_TRUE(provider_.IsVSyncNotificationEnabled());
-
-  base::TimeTicks frame_time = base::TimeTicks::Now();
-  provider_.Trigger(frame_time);
-  EXPECT_TRUE(client_.TickCalled());
-  EXPECT_EQ(timer_->LastTickTime(), frame_time);
-}
-
-TEST_F(VSyncTimeSourceTest, NotificationDisabledLazily) {
-  base::TimeTicks frame_time = base::TimeTicks::Now();
-
-  // Enable timer and trigger sync once.
-  timer_->SetActive(true);
-  EXPECT_TRUE(provider_.IsVSyncNotificationEnabled());
-  provider_.Trigger(frame_time);
-  EXPECT_TRUE(client_.TickCalled());
-
-  // Disabling the timer should not disable vsync notification immediately.
-  client_.Reset();
-  timer_->SetActive(false);
-  EXPECT_TRUE(provider_.IsVSyncNotificationEnabled());
-
-  // At the next vsync the notification is disabled, but the timer isn't ticked.
-  provider_.Trigger(frame_time);
-  EXPECT_FALSE(provider_.IsVSyncNotificationEnabled());
-  EXPECT_FALSE(client_.TickCalled());
-
-  // The notification should not be disabled multiple times.
-  provider_.RequestVSyncNotification(timer_.get());
-  provider_.Trigger(frame_time);
-  EXPECT_TRUE(provider_.IsVSyncNotificationEnabled());
-  EXPECT_FALSE(client_.TickCalled());
-}
-
-TEST_F(VSyncTimeSourceTest, NotificationDisabledImmediatelyForSetting) {
-  timer_ = VSyncTimeSource::Create(&provider_,
-                                   VSyncTimeSource::DISABLE_SYNCHRONOUSLY);
-  timer_->SetClient(&client_);
-  base::TimeTicks frame_time = base::TimeTicks::Now();
-
-  // Enable timer and trigger sync once.
-  timer_->SetActive(true);
-  EXPECT_TRUE(provider_.IsVSyncNotificationEnabled());
-  provider_.Trigger(frame_time);
-  EXPECT_TRUE(client_.TickCalled());
-
-  // Disable timer should disable vsync notification immediately.
-  timer_->SetActive(false);
-  EXPECT_FALSE(provider_.IsVSyncNotificationEnabled());
-
-  // Enable again and timer can be ticked again.
-  client_.Reset();
-  timer_->SetActive(true);
-  EXPECT_TRUE(provider_.IsVSyncNotificationEnabled());
-  provider_.Trigger(frame_time);
-  EXPECT_TRUE(client_.TickCalled());
-}
-
-TEST_F(VSyncTimeSourceTest, ValidNextTickTime) {
-  base::TimeTicks frame_time = base::TimeTicks::Now();
-  base::TimeDelta interval = base::TimeDelta::FromSeconds(1);
-
-  ASSERT_EQ(timer_->NextTickTime(), base::TimeTicks());
-
-  timer_->SetActive(true);
-  provider_.Trigger(frame_time);
-  ASSERT_EQ(timer_->NextTickTime(), frame_time);
-
-  timer_->SetTimebaseAndInterval(frame_time, interval);
-  ASSERT_EQ(timer_->NextTickTime(), frame_time + interval);
-}
-
-}  // namespace
-}  // namespace cc