fix(runtime): enforce main event loop ownership (#6424)

tests/test_global_event_loop.py

@@ -0,0 +1,60 @@
+import asyncio
+
+import pytest
+
+from app.runtime.config import GlobalVar
+
+
+def test_global_loop_requires_lifecycle_owner() -> None:
+    """启动前读取主循环不得隐式创建一个无法执行任务的循环。"""
+    runtime = GlobalVar()
+    runtime.CURRENT_EVENT_LOOP = None
+
+    with pytest.raises(RuntimeError, match="主事件循环尚未启动或已经停止"):
+        _ = runtime.loop
+
+    assert runtime.CURRENT_EVENT_LOOP is None
+
+
+def test_global_loop_rejects_closed_owner() -> None:
+    """已关闭的生命周期 owner 不得继续接收跨线程任务。"""
+    runtime = GlobalVar()
+    loop = asyncio.new_event_loop()
+    runtime.set_loop(loop)
+    loop.close()
+
+    with pytest.raises(RuntimeError, match="主事件循环尚未启动或已经停止"):
+        _ = runtime.loop
+
+
+def test_global_loop_rejects_owner_that_is_not_running() -> None:
+    """未运行的循环不得成为跨线程任务投递目标。"""
+    runtime = GlobalVar()
+    loop = asyncio.new_event_loop()
+    try:
+        runtime.set_loop(loop)
+
+        with pytest.raises(RuntimeError, match="主事件循环尚未启动或已经停止"):
+            _ = runtime.loop
+    finally:
+        loop.close()
+
+
+def test_clear_global_loop_preserves_new_owner() -> None:
+    """迟到的旧生命周期清理不得清除后来登记的循环。"""
+    runtime = GlobalVar()
+    previous = asyncio.new_event_loop()
+
+    async def verify() -> None:
+        current = asyncio.get_running_loop()
+        runtime.set_loop(current)
+        runtime.clear_loop(previous)
+        assert runtime.loop is current
+
+        runtime.clear_loop(current)
+        assert runtime.CURRENT_EVENT_LOOP is None
+
+    try:
+        asyncio.run(verify())
+    finally:
+        previous.close()