[REF] test_mass_mailing: update module to new common

PURPOSE

Currently tools and asserts for mail tests are located inside test_mail
module. It makes difficult to re-use them in apps tests or force them to
write custom quick and dirty tools and asserts.

SPECIFICATIONS

Update this module to new tools / asserts / helpers / classes defined in mail
and test_mail.

In this commit we remove the ``MassMailingCase`` and replace it by a fresh
``TestMailCommon`` that is simply updated to hold a marketing user by default.
That way all mocks and asserts are available in all sub test classes.

Coming from common update, we have notably

  * ``BaseFunctionalTest`` class is replaced by the new ``TestMailCommon``
    pimped one;
  * ``assertNotifications`` is replaced by ``assertSinglePostNotifications``
    (shortcut for a simple message_post) or ``assertPostNotifications``
    (complete asserts involving several messages and notifications);
  * correctly invoke ``mock_mail_gateway`` when mocking email sending;
  * replace manual check of sent emails or ``assertEmails`` by
    ``assertSentEmails``;
  * remove custom mocks / checks and replace them by now standard mocks
    and assertions (if any);

LINKS

Task ID 2068986
PR #38070

1 files changed, 4 insertions, 10 deletions

diff --git a/addons/test_mass_mailing/tests/test_composer.py b/addons/test_mass_mailing/tests/test_composer.py
index 4307bc95591..2b43e87e6d9 100644
--- a/addons/test_mass_mailing/tests/test_composer.py
+++ b/addons/test_mass_mailing/tests/test_composer.py
@@ -1,28 +1,22 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo.addons.test_mail.tests.common import mail_new_test_user
-from odoo.tests import common
+from odoo.addons.test_mass_mailing.tests import common
 
 
-class TestComposer(common.SavepointCase):
+class TestComposer(common.TestMailCommon):
 
     def test_body_responsive(self):
         """ Testing mail mailing responsive mail body """
-        test_user = mail_new_test_user(
-            self.env, login='geraldine',
-            groups='mass_mailing.group_mass_mailing_user,base.group_partner_manager'  # TDE FIXME: check if really necessary for mass mailing
-        )
-
         test_record = self.env['res.partner'].create({'name': 'Mass Mail Partner'})
-        mass_mail_record = self.env['mailing.mailing'].with_user(test_user).create({
+        mass_mail_record = self.env['mailing.mailing'].with_user(self.user_marketing).create({
             'name': 'Test',
             'subject': 'Test',
             'state': 'draft',
             'mailing_model_id': self.env.ref('base.model_res_partner').id,
         })
 
-        composer = self.env['mail.compose.message'].with_user(test_user).with_context({
+        composer = self.env['mail.compose.message'].with_user(self.user_marketing).with_context({
             'default_composition_mode': 'mass_mail',
             'default_model': 'res.partner',
             'default_res_id': test_record.id,