[IMP] mail: tests: add a new simple base model for testing

Purpose: have simple test models to use in various modules and be
independent from standard models behavior / tweaking.

addons/mail/security/ir.model.access.csv

@@ -35,6 +35,7 @@ access_mail_shortcode,mail.shortcode,model_mail_shortcode,base.group_user,1,1,1,
 access_mail_shortcode_portal,mail.shortcode.portal,model_mail_shortcode,base.group_portal,1,0,0,0
 access_mail_test_user,mail.test.all,model_mail_test,base.group_user,1,1,1,1
 access_mail_test_portal,mail.test.all,model_mail_test,base.group_portal,1,1,0,0
+access_mail_test_simple,mail.test.simple.all,model_mail_test_simple,base.group_user,1,1,1,1
 access_mail_activity_all,mail.activity.all,model_mail_activity,,1,0,0,0
 access_mail_activity_user,mail.activity.user,model_mail_activity,base.group_user,1,1,1,1
 access_mail_activity_type_all,mail.activity.type.all,model_mail_activity_type,,1,0,0,0

addons/mail/tests/test_mail_model.py

@@ -1,16 +1,23 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import api, fields, models
+from odoo import fields, models
+
+
+class MailTestSimple(models.Model):
+    _description = 'Test Simple Chatter Record'
+    _name = 'mail.test.simple'
+    _inherit = ['mail.thread']
+
+    name = fields.Char()
+    email_from = fields.Char()
+    description = fields.Text()
 
 
 class MailTest(models.Model):
-    """ A mail.channel is a discussion group that may behave like a listener
-    on documents. """
     _description = 'Test Mail Model'
     _name = 'mail.test'
     _mail_post_access = 'read'
-    # _mail_flat_thread = False
     _inherit = ['mail.thread', 'mail.alias.mixin']
 
     name = fields.Char()