From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Fri, 19 Jul 2024 08:03:43 +0000 (+0200)
Subject: [3.13] gh-65453: Docs - clarify AttributeError behaviour on PropertyMock (GH-121666... 
X-Git-Tag: v3.13.0rc1~103
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=7f632419ffc69a226d8a9e7fa3aa7ac5a3a9f93e;p=thirdparty%2FPython%2Fcpython.git

[3.13] gh-65453: Docs - clarify AttributeError behaviour on PropertyMock (GH-121666) (GH-121968)

Fixed at EuroPython 24 sprints.
(cherry picked from commit 94e6644584d9cb08a4edcd1027e288386184816b)

Co-authored-by: Vlastimil Zíma <ziima@users.noreply.github.com>
---

diff --git a/Doc/library/unittest.mock.rst b/Doc/library/unittest.mock.rst
index d8ba24c3146c..2e0e062c64d8 100644
--- a/Doc/library/unittest.mock.rst
+++ b/Doc/library/unittest.mock.rst
@@ -860,6 +860,20 @@ object::
     3
     >>> p.assert_called_once_with()
 
+.. caution::
+
+    If an :exc:`AttributeError` is raised by :class:`PropertyMock`,
+    it will be interpreted as a missing descriptor and
+    :meth:`~object.__getattr__` will be called on the parent mock::
+
+        >>> m = MagicMock()
+        >>> no_attribute = PropertyMock(side_effect=AttributeError)
+        >>> type(m).my_property = no_attribute
+        >>> m.my_property
+        <MagicMock name='mock.my_property' id='140165240345424'>
+
+    See :meth:`~object.__getattr__` for details.
+
 
 .. class:: AsyncMock(spec=None, side_effect=None, return_value=DEFAULT, wraps=None, name=None, spec_set=None, unsafe=False, **kwargs)