bpo-22859: deprecate unittest.main.TestProgram.usageExit (GH-30293)

Co-authored-by: Kumar Aditya <[email protected]>
Co-authored-by: Jelle Zijlstra <[email protected]>

Author: 3 people

Lib/unittest/main.py

@@ -3,6 +3,7 @@
 import sys
 import argparse
 import os
+import warnings
 
 from . import loader, runner
 from .signals import installHandler
@@ -101,6 +102,8 @@ def __init__(self, module='__main__', defaultTest=None, argv=None,
         self.runTests()
 
     def usageExit(self, msg=None):
+        warnings.warn("TestProgram.usageExit() is deprecated and will be"
+                      " removed in Python 3.13", DeprecationWarning)
         if msg:
             print(msg)
         if self._discovery_parser is None:

Misc/NEWS.d/next/Library/2021-12-29-19-37-49.bpo-22859.AixHW7.rst

@@ -0,0 +1 @@
+:meth:`~unittest.TestProgram.usageExit` is marked deprecated, to be removed in 3.13.