refactor: 推进后端分层架构治理

tests/test_chain_runtime_context.py

@@ -0,0 +1,47 @@
+"""Chain 运行上下文注入和无参兼容 provider 测试。"""
+
+from unittest.mock import Mock
+
+from app.application.chain.context import ChainRuntimeContext
+from app.application.chain import context as chain_context
+from app.chain import ChainBase
+
+
+def _context() -> ChainRuntimeContext:
+    """构造不连接数据库、不启动线程的最小 Chain 上下文。"""
+    return ChainRuntimeContext(
+        module_manager=Mock(),
+        plugin_manager=Mock(),
+        event_manager=Mock(),
+        message_oper=Mock(),
+        message_helper=Mock(),
+        file_cache=Mock(),
+        async_file_cache=Mock(),
+        message_queue_factory=Mock(return_value=Mock()),
+    )
+
+
+def test_chain_accepts_explicit_runtime_context() -> None:
+    """新代码应能显式注入最小运行时依赖而不创建真实管理器。"""
+    context = _context()
+
+    chain = ChainBase(context)
+
+    assert chain.modulemanager is context.module_manager
+    assert chain.pluginmanager is context.plugin_manager
+    assert chain.eventmanager is context.event_manager
+    assert chain.messagehelper is context.message_helper
+    context.message_queue_factory.assert_called_once_with(chain.run_module)
+
+
+def test_no_arg_chain_uses_compatibility_context_provider(monkeypatch) -> None:
+    """V3 兼容期内无参 Chain() 应从组合根 provider 获取相同上下文。"""
+    context = _context()
+    provider = Mock(return_value=context)
+    monkeypatch.setattr(chain_context, "_context_provider", provider)
+
+    chain = ChainBase()
+
+    provider.assert_called_once_with()
+    assert chain.modulemanager is context.module_manager
+    assert chain.pluginmanager is context.plugin_manager