vsync_waiter_unittests.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#define FML_USED_ON_EMBEDDER
 
#include <initializer_list>
 
#include "flutter/common/settings.h"
#include "flutter/common/task_runners.h"
#include "flutter/shell/common/switches.h"
 
#include "gtest/gtest.h"
#include "thread_host.h"
#include "vsync_waiter.h"
 
namespace flutter {
namespace testing {
 
class TestVsyncWaiter : public VsyncWaiter {
 public:
  explicit TestVsyncWaiter(const TaskRunners& task_runners)
      : VsyncWaiter(task_runners) {}
 
  int await_vsync_call_count_ = 0;
 
 protected:
  void AwaitVSync() override { await_vsync_call_count_++; }
};
 
TEST(VsyncWaiterTest, NoUnneededAwaitVsync) {
  using flutter::ThreadHost;
  std::string prefix = "vsync_waiter_test";
 
  fml::MessageLoop::EnsureInitializedForCurrentThread();
  auto task_runner = fml::MessageLoop::GetCurrent().GetTaskRunner();
 
  const flutter::TaskRunners task_runners(prefix, task_runner, task_runner,
                                          task_runner, task_runner);
 
  TestVsyncWaiter vsync_waiter(task_runners);
 
  vsync_waiter.ScheduleSecondaryCallback(1, [] {});
  EXPECT_EQ(vsync_waiter.await_vsync_call_count_, 1);
 
  vsync_waiter.ScheduleSecondaryCallback(2, [] {});
  EXPECT_EQ(vsync_waiter.await_vsync_call_count_, 1);
}
 
}  // namespace testing
}  // namespace flutter