https://github.com/python/cpython/commit/683697a93be9a67bbd93b4e42b9f4bd9a5092587
commit: 683697a93be9a67bbd93b4e42b9f4bd9a5092587
branch: 3.14
author: Serhiy Storchaka <[email protected]>
committer: serhiy-storchaka <[email protected]>
date: 2026-07-05T08:42:33Z
summary:

[3.14] gh-66335: Test uppercase IMAP4 command names (GH-152876) (GH-153081)

(cherry picked from commit 3cd6b7406442ad976c6651b9fba6f078971cdf10)

Co-authored-by: Milan Oberkirch <[email protected]>
Co-authored-by: Claude Opus 4.8 (1M context) <[email protected]>

files:
M Lib/test/test_imaplib.py

diff --git a/Lib/test/test_imaplib.py b/Lib/test/test_imaplib.py
index 7bab5f5bcb02bc..febedd4b325a18 100644
--- a/Lib/test/test_imaplib.py
+++ b/Lib/test/test_imaplib.py
@@ -1731,6 +1731,16 @@ def test_xatom(self):
         self.assertEqual(data, [b'MYCOMMAND completed'])
         self.assertEqual(server.args, ['arg1', 'arg2'])
 
+    def test_uppercase_command_names(self):
+        client, server = self._setup(SimpleIMAPHandler)
+        client.login('user', 'pass')
+        self.assertEqual(client.CAPABILITY, client.capability)
+        self.assertEqual(client.SELECT, client.select)
+        typ, data = client.CAPABILITY()
+        self.assertEqual(typ, 'OK')
+        with self.assertRaises(AttributeError):
+            client.NONEXISTENT
+
     # property tests
 
     def test_file_property_should_not_be_accessed(self):

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