Add and fix tests

Author: Jesse205

stdlib/@tests/test_cases/check_tkinter.py

@@ -13,8 +13,14 @@ def custom_handler(exc: type[BaseException], val: BaseException, tb: types.Trace
 
 
 root = tkinter.Tk()
-root.report_callback_exception = traceback.print_exception
-root.report_callback_exception = custom_handler
+root.report_callback_exception = traceback.print_exception  # type: ignore[method-assign]
+root.report_callback_exception = custom_handler  # type: ignore[method-assign]
+root.report_callback_exception(TypeError, TypeError("no"), None)
+
+
+class App(tkinter.Tk):
+    def report_callback_exception(self, exc: type[BaseException], val: BaseException, tb: types.TracebackType | None) -> None:
+        print("oh no")
 
 
 def foo(x: int, y: str) -> None:

stdlib/tkinter/__init__.pyi

@@ -1063,7 +1063,8 @@ class Tk(Misc, Wm):
     config = configure
     def destroy(self) -> None: ...
     def readprofile(self, baseName: str, className: str) -> None: ...
-    def report_callback_exception(self, exc: type[BaseException], val: BaseException, tb: TracebackType | None) -> object: ...
+    def report_callback_exception(self, exc: type[BaseException], val: BaseException, tb: TracebackType | None, /) -> object: ...
+
     # Tk has __getattr__ so that tk_instance.foo falls back to tk_instance.tk.foo
     # Please keep in sync with _tkinter.TkappType.
     # Some methods are intentionally missing because they are inherited from Misc instead.