Function TEST

tests/unit_test/cfs_scheduler_test.cpp:13–51

测试 CFS 调度器的基本入队出队功能

// 测试 CFS 调度器的基本入队出队功能
TEST(CfsSchedulerTest, BasicEnqueueDequeue) {
  CfsScheduler scheduler;

  // 创建测试任务
  TaskControlBlock task1("Task1", 1, nullptr, nullptr);
  task1.status = TaskStatus::kReady;
  task1.sched_data.cfs.weight = CfsScheduler::kDefaultWeight;
  task1.sched_data.cfs.vruntime = 0;

  TaskControlBlock task2("Task2", 2, nullptr, nullptr);
  task2.status = TaskStatus::kReady;
  task2.sched_data.cfs.weight = CfsScheduler::kDefaultWeight;
  task2.sched_data.cfs.vruntime = 0;

  // 测试空队列
  EXPECT_TRUE(scheduler.IsEmpty());
  EXPECT_EQ(scheduler.GetQueueSize(), 0);
  EXPECT_EQ(scheduler.PickNext(), nullptr);

  // 加入任务
  scheduler.Enqueue(&task1);
  EXPECT_FALSE(scheduler.IsEmpty());
  EXPECT_EQ(scheduler.GetQueueSize(), 1);

  scheduler.Enqueue(&task2);
  EXPECT_EQ(scheduler.GetQueueSize(), 2);

  // 选择任务（vruntime 相同时，按入队顺序）
  auto* next1 = scheduler.PickNext();
  EXPECT_NE(next1, nullptr);
  EXPECT_EQ(scheduler.GetQueueSize(), 1);

  auto* next2 = scheduler.PickNext();
  EXPECT_NE(next2, nullptr);
  EXPECT_EQ(scheduler.GetQueueSize(), 0);

  EXPECT_EQ(scheduler.PickNext(), nullptr);
  EXPECT_TRUE(scheduler.IsEmpty());
}

// 测试 vruntime 排序
TEST(CfsSchedulerTest, VruntimeOrdering) {