[IMP] test_mail: add tests for mail gateway and perform light cleaning

This commit add some tests related to the mail gateway: more bounce management
tests and some additional thread formation tests. Some test asserts about
bounce / blacklist management are commented as they are not completely working
currently. This will be improved in master soon.

Some cleaning in also done in all mail gateway tests. Notably some call to
tool methods are cleaned / simplified, duplicate tests are removed. Some
low-level checks are removed.

A new test model is added for mail gateway: mail.test.gateway. It is a
chatter model with blacklist enabled on it. It allows to tests the
various blacklist-related overrides and features as well as all basic
mail gateway features.

Sub-part of task 1853147 (pre-cleaning before implementing mail gateway
improvements)
Linked to PR #32974

1 files changed, 13 insertions, 0 deletions

diff --git a/addons/test_mail/models/test_mail_models.py b/addons/test_mail/models/test_mail_models.py
index 50de0aca07d..bdf9f164da8 100644
--- a/addons/test_mail/models/test_mail_models.py
+++ b/addons/test_mail/models/test_mail_models.py
@@ -15,6 +15,19 @@ class MailTestSimple(models.Model):
     email_from = fields.Char()
 
 
+class MailTestGateway(models.Model):
+    """ A very simple model only inheriting from mail.thread to test pure mass
+    mailing features and base performances. """
+    _description = 'Simple Chatter Model for Mail Gateway'
+    _name = 'mail.test.gateway'
+    _inherit = ['mail.blacklist.mixin', 'mail.thread']
+    _primary_email = 'email_from'
+
+    name = fields.Char()
+    email_from = fields.Char()
+    custom_field = fields.Char()
+
+
 class MailTestStandard(models.Model):
     """ This model can be used in tests when automatic subscription and simple
     tracking is necessary. Most features are present in a simple way. """