[FIX] mail: fix user preference test

This commit mocks the "preference_save" action on the res.users model during
the test that checks that the user can modify its own preferences.

This allows to ease the testing as a context reload in the middle of test steps
was not handled correctly by the test runner.

Task-3246086

closes odoo/odoo#116800

Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>

addons/mail/tests/test_user_modify_own_profile.py

@@ -2,6 +2,9 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from odoo.tests import HttpCase, tagged
+from odoo.addons.base.models.res_users import Users
+
+from unittest.mock import patch
 
 
 @tagged('-at_install', 'post_install')
@@ -11,5 +14,7 @@ class TestUserModifyOwnProfile(HttpCase):
         """" A user should be able to modify their own profile.
         Even if that user does not have access rights to write on the res.users model. """
 
-        self.start_tour("/web", "mail/static/tests/tours/user_modify_own_profile_tour.js", login="demo")
+        # avoid 'reload_context' action in the middle of the tour to ease steps and form save checks
+        with patch.object(Users, 'preference_save', lambda self: True):
+            self.start_tour("/web", "mail/static/tests/tours/user_modify_own_profile_tour.js", login="demo")
         self.assertEqual(self.env.ref('base.user_demo').email, "updatedemail@example.com")