fix for provider overriding in litestar

tests/integrations/test_litestar_di.py

@@ -71,3 +71,34 @@ def test_litestar_di() -> None:
             "local_dependency": 1,
             "router_dependency": "",
         }
+
+
+def test_litestar_di_override_fail_on_provider_override() -> None:
+    mock = 12345364758999
+    with TestClient(app=app) as client, DIContainer.int_fn.override_context(mock):
+        response = client.get("/router/controller/handler")
+
+    assert response.status_code == HTTP_200_OK, response.text
+    assert response.json() == {
+        "app_dependency": False,
+        "controller_dependency": ["some"],
+        "local_dependency": mock,
+        "router_dependency": "",
+    }
+
+
+def test_litestar_di_override_fail_on_override_providers() -> None:
+    mock = 12345364758999
+    overrides = {
+        "int_fn": mock,
+    }
+    with TestClient(app=app) as client, DIContainer.override_providers(overrides):
+        response = client.get("/router/controller/handler")
+
+    assert response.status_code == HTTP_200_OK, response.text
+    assert response.json() == {
+        "app_dependency": False,
+        "controller_dependency": ["some"],
+        "local_dependency": mock,
+        "router_dependency": "",
+    }

that_depends/providers/base.py

@@ -5,6 +5,8 @@
 from contextlib import contextmanager
 from operator import attrgetter
 
+import typing_extensions
+
 from that_depends.entities.resource_context import ResourceContext
 
 
@@ -22,6 +24,9 @@ def __init__(self) -> None:
         super().__init__()
         self._override: typing.Any = None
 
+    def __deepcopy__(self, *_: object, **__: object) -> typing_extensions.Self:
+        return self
+
     def __getattr__(self, attr_name: str) -> typing.Any:  # noqa: ANN401
         if attr_name.startswith("_"):
             msg = f"'{type(self)}' object has no attribute '{attr_name}'"