Function exit_test

tests/system_test/exit_test.cpp:450–506

* @brief Exit 系统测试入口 */

 * @brief Exit 系统测试入口
 */
auto exit_test() -> bool {
  klog::Info("===== Exit System Test Start =====");

  // 重置全局计数器
  g_tests_completed = 0;
  g_tests_failed = 0;
  g_exit_test_counter = 0;

  auto& task_mgr = TaskManagerSingleton::instance();

  // 测试 1: Normal exit
  auto test1 = kstd::make_unique<TaskControlBlock>("TestExitNormal", 10,
                                                   test_exit_normal, nullptr);
  task_mgr.AddTask(std::move(test1));

  // 测试 2: Exit with error
  auto test2 = kstd::make_unique<TaskControlBlock>(
      "TestExitWithError", 10, test_exit_with_error, nullptr);
  task_mgr.AddTask(std::move(test2));

  // 测试 3: Thread exit
  auto test3 = kstd::make_unique<TaskControlBlock>("TestThreadExit", 10,
                                                   test_thread_exit, nullptr);
  task_mgr.AddTask(std::move(test3));

  // 测试 4: Orphan exit
  auto test4 = kstd::make_unique<TaskControlBlock>("TestOrphanExit", 10,
                                                   test_orphan_exit, nullptr);
  task_mgr.AddTask(std::move(test4));

  // 测试 5: Zombie process
  auto test5 = kstd::make_unique<TaskControlBlock>(
      "TestZombieProcess", 10, test_zombie_process, nullptr);
  task_mgr.AddTask(std::move(test5));

  klog::Info("Waiting for all 5 sub-tests to complete...");

  // 等待所有子测试完成（每个子测试在退出前会增加 g_tests_completed）
  // 超时: 200 * 50ms = 10s
  int timeout = 200;
  while (timeout > 0) {
    (void)sys_sleep(50);
    if (g_tests_completed.load() >= 5) {
      break;
    }
    timeout--;
  }

  klog::Info("Exit System Test: completed={}, failed={}",
             g_tests_completed.load(), g_tests_failed.load());

  EXPECT_EQ(g_tests_completed, 5, "All 5 sub-tests completed");
  EXPECT_EQ(g_tests_failed, 0, "No sub-tests failed");

  klog::Info("===== Exit System Test End =====");
  return true;
}