Function wait_test

tests/system_test/wait_test.cpp:332–382

* @brief Wait 系统测试入口 */

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

  g_tests_completed = 0;
  g_tests_failed = 0;

  auto& task_mgr = TaskManagerSingleton::instance();

  // 测试 1: 基本 wait 功能
  auto test1 = kstd::make_unique<TaskControlBlock>("TestWaitBasic", 10,
                                                   test_wait_basic, nullptr);
  task_mgr.AddTask(std::move(test1));

  // 测试 2: 等待任意子进程
  auto test2 = kstd::make_unique<TaskControlBlock>(
      "TestWaitAnyChild", 10, test_wait_any_child, nullptr);
  task_mgr.AddTask(std::move(test2));

  // 测试 3: 非阻塞 wait
  auto test3 = kstd::make_unique<TaskControlBlock>("TestWaitNoHang", 10,
                                                   test_wait_no_hang, nullptr);
  task_mgr.AddTask(std::move(test3));

  // 测试 4: 进程组 wait
  auto test4 = kstd::make_unique<TaskControlBlock>(
      "TestWaitProcessGroup", 10, test_wait_process_group, nullptr);
  task_mgr.AddTask(std::move(test4));

  // 测试 5: 僵尸进程回收
  auto test5 = kstd::make_unique<TaskControlBlock>(
      "TestWaitZombieReap", 10, test_wait_zombie_reap, nullptr);
  task_mgr.AddTask(std::move(test5));

  // 同步等待所有测试完成
  constexpr int kExpectedTests = 5;
  int timeout = 400;
  while (timeout > 0) {
    (void)sys_sleep(50);
    if (g_tests_completed >= kExpectedTests) {
      break;
    }
    timeout--;
  }

  EXPECT_EQ(g_tests_completed.load(), kExpectedTests,
            "All wait tests should complete");
  EXPECT_EQ(g_tests_failed.load(), 0, "No wait tests should fail");

  klog::Info("Wait System Test Suite: COMPLETED");
  return true;
}