[FIX] mail: activities in lost opportunities should appear

Before this commit:
Activities made on the archived record are not shown in the activity
system-tray menu.

After this commit:
Activities made on the archived record are shown in the system-tray
activity menu.

task-3458597

closes odoo/odoo#146462

X-original-commit: d6d91b4f86d3d0ef954160a9de6e42a1bc4e184f
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/test_mail/tests/test_mail_activity.py

@@ -743,6 +743,27 @@ class TestActivityMixin(TestActivityCommon):
             self.assertEqual(test_record_1, record)
 
 
+@tests.tagged('mail_activity')
+class TestActivitySystray(TestActivityCommon):
+    """Test for systray_get_activities"""
+
+    def test_systray_activities_for_archived_records(self):
+        """Check that activities made on archived records are shown in the
+        systray activities. """
+        test_record = self.test_record.with_user(self.user_employee)
+        test_record.action_archive()
+        test_record.activity_schedule(
+            'test_mail.mail_act_test_todo',
+            user_id=self.env.user.id,
+        )
+
+        total_count = sum(
+            record['total_count'] for record in self.env.user.systray_get_activities()
+            if record.get('model') == test_record._name
+        )
+        self.assertEqual(total_count, 1)
+
+
 @tests.tagged('mail_activity')
 class TestActivityViewHelpers(TestActivityCommon):
     @classmethod