Do not override methods without patching (#886)

src/dependency_injector/wiring.py

@@ -523,6 +523,10 @@ def _patch_method(
 
     _bind_injections(fn, providers_map)
 
+    if fn is method:
+        # Hotfix, see: https://github.com/ets-labs/python-dependency-injector/issues/884
+        return
+
     if isinstance(method, (classmethod, staticmethod)):
         fn = type(method)(fn)
 

tests/unit/wiring/test_no_interference.py

@@ -0,0 +1,40 @@
+from typing import Any, Iterator
+
+from pytest import fixture
+
+from dependency_injector.containers import DeclarativeContainer
+from dependency_injector.providers import Object
+from dependency_injector.wiring import Provide, inject
+
+
+class A:
+    @inject
+    def foo(self, value: str = Provide["value"]) -> str:
+        return "A" + value
+
+
+class B(A): ...
+
+
+class C(A):
+    def foo(self, *args: Any, **kwargs: Any) -> str:
+        return "C" + super().foo()
+
+
+class D(B, C): ...
+
+
+class Container(DeclarativeContainer):
+    value = Object("X")
+
+
+@fixture
+def container() -> Iterator[Container]:
+    c = Container()
+    c.wire(modules=[__name__])
+    yield c
+    c.unwire()
+
+
+def test_preserve_mro(container: Container) -> None:
+    assert D().foo() == "CAX"