Add testcase for __ne__ method

moreal · moreal · commit 5aff28ba70a9 · 2024-04-14T12:01:58.000+09:00
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
@@ -610,6 +610,11 @@ def __dir__(self):
         # test that object has a __dir__()
         self.assertEqual(sorted([].__dir__()), dir([]))
 
+    def test___ne__(self):
+        self.assertFalse(None.__ne__(None))
+        self.assertIs(None.__ne__(0), NotImplemented)
+        self.assertIs(None.__ne__("abc"), NotImplemented)
+
     def test_divmod(self):
         self.assertEqual(divmod(12, 7), (1, 5))
         self.assertEqual(divmod(-12, 7), (-2, 2))
