test: 共享测试 harness 入 app/testing（网络守卫 + 引导）并统一 sys.modules 打桩原语 (#5888)

tests/test_testing_bootstrap.py

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+"""共享测试引导工具的回归用例。"""
+from __future__ import annotations
+
+import builtins
+import types
+from pathlib import Path
+
+from app.testing import bootstrap
+
+
+def test_isolate_config_cleanup_uses_loaded_db_module_without_late_import(monkeypatch):
+    """清理回调只读取已加载模块，避免解释器关停期触发二次导入。"""
+    captured = {}
+    import_calls = []
+
+    def fake_import(name, *args, **kwargs):
+        """记录清理回调是否试图重新导入数据库模块。"""
+        if name == "app.db":
+            import_calls.append(name)
+        return original_import(name, *args, **kwargs)
+
+    def fake_register(func):
+        """截获 atexit 回调，便于直接验证清理行为。"""
+        captured["cleanup"] = func
+
+    monkeypatch.setattr(bootstrap, "_isolated_config_dir", None)
+    monkeypatch.delenv("CONFIG_DIR", raising=False)
+    monkeypatch.setattr(bootstrap.tempfile, "mkdtemp", lambda prefix: "/tmp/mp-test-config-demo")
+    monkeypatch.setattr(bootstrap.shutil, "rmtree", lambda *args, **kwargs: None)
+    monkeypatch.setattr(bootstrap.atexit, "register", fake_register)
+
+    original_import = builtins.__import__
+    monkeypatch.setattr(builtins, "__import__", fake_import)
+
+    bootstrap.isolate_config_dir()
+    captured["cleanup"]()
+
+    assert import_calls == []
+
+
+def test_mark_plugin_generation_prefers_pathlib_item_path():
+    """pytest 新版 item.path 可独立驱动 v1/v2 marker 标记。"""
+
+    class FakeItem:
+        """只暴露 pytest 7+ 的 path 属性，模拟新版收集对象。"""
+
+        def __init__(self, value: str):
+            self.path = Path(value)
+            self.markers = []
+
+        def add_marker(self, marker):
+            """记录被添加的 marker。"""
+            self.markers.append(marker)
+
+    pytest_module = types.SimpleNamespace(mark=types.SimpleNamespace(v1="v1", v2="v2"))
+    v2_item = FakeItem("/repo/tests/v2/test_demo.py")
+    v1_item = FakeItem("/repo/tests/v1/test_demo.py")
+
+    bootstrap.mark_plugin_generation([v2_item, v1_item], pytest_module)
+
+    assert v2_item.markers == ["v2"]
+    assert v1_item.markers == ["v1"]