Fix return type checkers calls on ellipses functions (#5107)

Closes #4736

1 files changed, 44 insertions, 0 deletions

diff --git a/tests/functional/c/class_protocol_ellipsis.py b/tests/functional/c/class_protocol_ellipsis.py
new file mode 100644
index 000000000..ef5d3b34e
--- /dev/null
+++ b/tests/functional/c/class_protocol_ellipsis.py
@@ -0,0 +1,44 @@
+""""Tests for return type checkers for protocol methods with ellipsis function body"""
+# pylint: disable=missing-class-docstring
+from typing import Any, Iterator
+
+
+class MyClass:
+    """The "invalid-*-returned" messages shouldn't be emitted for stub functions
+    Original issue: https://github.com/PyCQA/pylint/issues/4736"""
+
+    def __len__(self) -> int:
+        ...
+
+    def __hash__(self) -> int:
+        ...
+
+    def __index__(self) -> int:
+        ...
+
+    def __iter__(self) -> Iterator[Any]:
+        ...
+
+    def __bool__(self) -> bool:
+        ...
+
+    def __repr__(self) -> object:
+        ...
+
+    def __str__(self) -> str:
+        ...
+
+    def __bytes__(self) -> bytes:
+        ...
+
+    def __length_hint__(self) -> int:
+        ...
+
+    def __format__(self, format_spec: str) -> str:
+        ...
+
+    def __getnewargs__(self) -> tuple:
+        ...
+
+    def __getnewargs_ex__(self) -> tuple:
+        ...