test: 添加插件依赖机制自动化回归测试

- 新增 7 个测试用例固化插件依赖关系
- 验证 http 插件依赖 video
- 验证 ble/wifi/video/screen 插件无依赖
- 验证所有插件 ID 唯一性
- 验证拓扑排序正确性（依赖项先初始化）
- 所有 31 个测试通过

防止依赖关系漂移，确保架构稳定性。

TEAM_CHAT.md

@@ -2008,3 +2008,58 @@ cargo check
 
 ## 结论
 BLE GATT notify 功能已完整实现，符合 BlueZ GATT 规范。WiFi 状态变更时会主动推送 PropertiesChanged 信号给已订阅的 BLE 客户端。无需修改代码。
+
+---
+
+## 周雅婷 (测试工程师) - 2026-03-12
+
+### 任务：插件依赖机制自动化回归测试
+
+根据架构师王思远的要求，为插件依赖声明机制编写自动化回归测试，防止依赖关系漂移。
+
+### 测试实现
+
+在 `src/core/tests.rs` 中新增 7 个测试用例：
+
+#### 1. 依赖关系固化测试
+- `http_plugin_must_depend_on_video`: 验证 http 插件必须依赖 video (line 324-329)
+- `ble_plugin_must_have_no_dependencies`: 验证 ble 插件无依赖 (line 331-336)
+- `wifi_plugin_must_have_no_dependencies`: 验证 wifi 插件无依赖 (line 338-343)
+- `video_plugin_must_have_no_dependencies`: 验证 video 插件无依赖 (line 345-350)
+- `screen_plugin_must_have_no_dependencies`: 验证 screen 插件无依赖 (line 352-357)
+
+#### 2. 插件 ID 唯一性测试
+- `all_plugin_ids_must_be_unique`: 验证所有插件 ID 不重复 (line 359-385)
+  - 测试所有 5 个插件：ble, http, screen, video, wifi
+  - 使用 HashSet 检测重复 ID
+
+#### 3. 拓扑排序验证测试
+- `topological_sort_places_http_after_video`: 验证依赖拓扑排序正确 (line 387-413)
+  - 使用 TestPlugin 模拟 http 依赖 video
+  - 验证 video 在 http 之前初始化
+
+### 测试结果
+```bash
+export PATH=/home/showen/.rustup/toolchains/stable-aarch64-unknown-linux-gnu/bin:$PATH
+cargo test --lib
+```
+
+✅ **所有 31 个测试通过**（包括新增的 7 个测试）
+- 编译时间：46.75s
+- 测试执行时间：0.17s
+- 0 个失败，0 个忽略
+
+### 测试覆盖
+- ✅ http 插件依赖 video
+- ✅ ble/wifi/video/screen 插件无依赖
+- ✅ 所有插件 ID 唯一
+- ✅ 拓扑排序正确（依赖项先初始化）
+
+### 技术细节
+- 直接调用各插件的 `dependencies()` 方法验证返回值
+- 使用 `assert_eq!` 和 `assert!` 进行断言
+- 拓扑排序测试通过检查事件日志中的初始化顺序验证
+
+### 价值
+这些测试固化了当前的插件依赖关系，任何未经审查的依赖变更都会导致测试失败，防止依赖漂移。
+

src/core/tests.rs

@@ -319,3 +319,101 @@ fn wifi_result_sent_to_manager_is_broadcast_to_plugins() {
     assert!(has_event(&events, "msg:alpha:wifi_result:connected"));
     assert!(has_event(&events, "msg:beta:wifi_result:connected"));
 }
+
+#[test]
+fn http_plugin_must_depend_on_video() {
+    use crate::plugins::http::HttpPlugin;
+    let plugin = HttpPlugin::new();
+    let deps = plugin.dependencies();
+    assert_eq!(deps, vec!["video"], "http plugin must depend on video");
+}
+
+#[test]
+fn ble_plugin_must_have_no_dependencies() {
+    use crate::plugins::ble::BlePlugin;
+    let plugin = BlePlugin::new();
+    let deps = plugin.dependencies();
+    assert!(deps.is_empty(), "ble plugin must have no dependencies");
+}
+
+#[test]
+fn wifi_plugin_must_have_no_dependencies() {
+    use crate::plugins::wifi::WifiPlugin;
+    let plugin = WifiPlugin::new();
+    let deps = plugin.dependencies();
+    assert!(deps.is_empty(), "wifi plugin must have no dependencies");
+}
+
+#[test]
+fn video_plugin_must_have_no_dependencies() {
+    use crate::plugins::video::VideoPlugin;
+    let plugin = VideoPlugin::new();
+    let deps = plugin.dependencies();
+    assert!(deps.is_empty(), "video plugin must have no dependencies");
+}
+
+#[test]
+fn screen_plugin_must_have_no_dependencies() {
+    use crate::plugins::screen::ScreenPlugin;
+    let plugin = ScreenPlugin::new();
+    let deps = plugin.dependencies();
+    assert!(deps.is_empty(), "screen plugin must have no dependencies");
+}
+
+#[test]
+fn all_plugin_ids_must_be_unique() {
+    use crate::plugins::ble::BlePlugin;
+    use crate::plugins::http::HttpPlugin;
+    use crate::plugins::screen::ScreenPlugin;
+    use crate::plugins::video::VideoPlugin;
+    use crate::plugins::wifi::WifiPlugin;
+    use std::collections::HashSet;
+
+    let plugins: Vec<Box<dyn Plugin>> = vec![
+        Box::new(BlePlugin::new()),
+        Box::new(HttpPlugin::new()),
+        Box::new(ScreenPlugin::new()),
+        Box::new(VideoPlugin::new()),
+        Box::new(WifiPlugin::new()),
+    ];
+
+    let mut ids = HashSet::new();
+    for plugin in plugins {
+        let id = plugin.id();
+        assert!(ids.insert(id), "duplicate plugin id detected: '{}'", id);
+    }
+}
+
+#[test]
+fn topological_sort_places_http_after_video() {
+    let events = Arc::new(Mutex::new(Vec::new()));
+    let mut manager = ServiceManager::new(test_config());
+
+    manager.register(Box::new(TestPlugin::new(
+        "http",
+        vec!["video"],
+        events.clone(),
+    )));
+    manager.register(Box::new(TestPlugin::new("video", vec![], events.clone())));
+
+    manager
+        .start_all()
+        .expect("start_all should succeed with http depending on video");
+
+    let event_log = lock_events(&events).clone();
+    let http_init_pos = event_log
+        .iter()
+        .position(|e| e == "init:http")
+        .expect("http should be initialized");
+    let video_init_pos = event_log
+        .iter()
+        .position(|e| e == "init:video")
+        .expect("video should be initialized");
+
+    assert!(
+        video_init_pos < http_init_pos,
+        "video must be initialized before http (video at {}, http at {})",
+        video_init_pos,
+        http_init_pos
+    );
+}