Misleading DeprecationWarning in unittest: It is deprecated to return a value!=None #97837
Description
In python != and is not are two different things.
Right now the deprecation warning says !=, let's see if that's true:
from unittest import TestCase, main class Nothing: def __eq__(self, o): return o is None class TestExample(TestCase): def test_method(self): n = Nothing() self.assertEqual(n, None) return n main()It still raises this:
/Users/sobolev/Desktop/cpython/Lib/unittest/case.py:678: DeprecationWarning: It is deprecated to return a value!=None from a test case (<bound method TestExample.test_method of <__main__.TestExample testMethod=test_method>>) return self.run(*args, **kwds) . ---------------------------------------------------------------------- Ran 1 test in 0.003s OK I believe that this is misleading. The proper message should say: It is deprecated to return a value that is not None from a test case
I will send a PR with the fix.