This commits is a bit a followup of odoo/odoo#62061 where new composer tests
were added. This commit finalize this work by merging all composer related
tests within the same file. It also backports some of tooling update done
in odoo/odoo#64459 or odoo/odoo#63677 in order to have coherent naming
through 14+ versions.

Some additional or deeper tests are added. Notably it now more cleanly
uses asserts for created mail.mail and sent emails.

Task ID-2500615
COM PR odoo/odoo#68874

Purpose
=======
Before, by default, if a user create a channel, he will not be member
of this channel.

After, the current user will always be member of the new channel.

Task 1963414

Purpose is to have some low level tests for composer itself allowing to
ensure its behavior. We add tests notably about default values computation
in mass mailing mode as well as template_id change and values synchronization
in composer model.

In a near future composer will probably be improved (use computed fields,
rewrite part of its logic to improve performances). Having tests done before
those tasks ensure we notice every change that might happen.

Task ID-2390314
PR odoo/odoo#62061

task-2313321

closes odoo/odoo#58778

X-original-commit: f6a561a7e21772c6a25785c8b2428954d4bd152e
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

PURPOSE

Have a cleaner test_mail addons

SPECIFICATIONS

Keep only mail-related tests, move odoobot in test mail full, send "update
notification" tests in mail (specific to mail). Merge some test files to
lessen number of files, perform light file renaming.

Split test mail models file to prepare some cleaning in those models and tests.

LINKS

Prepares Task ID 2238597 (clean notification models)
Prepares Task ID 2083854 (improve mass mailing technical flows)
PR #49891

PURPOSE

In order to rewrite some tests, remove low-level tests and add coverage
first step is to reorganize a bit test_mail content. Several tests cases
are spread among several files and finding back some feature coverage
tests is not easy.

SPECIFICATIONS

Split cc tests to either discuss or mail gateway tests. It allows to remove an
unnecessary file.

LINKS

Task 1958697

PURPOSE

In order to rewrite some tests, remove low-level tests and add coverage
first step is to reorganize a bit test_mail content. Several tests cases
are spread among several files and finding back some feature coverage
tests is not easy.

SPECIFICATIONS

Reorganize tests, notably

  * put message_post related test in test_message_post;
  * have only composer related test in test_message_compose(r);
  * put alias tests in test_mail_gateway;
  * move some discuss tests to post tests as they are linked to notification
    details, not really Discuss features.

LINKS

Task 1958697

PURPOSE

In order to rewrite some tests, remove low-level tests and add coverage
first step is to reorganize a bit test_mail content. Several tests cases
are spread among several files and finding back some feature coverage
tests is not easy.

SPECIFICATIONS

  * put channel moderation tests in test_mail_channel;
  * rename resend to message management;
  * rename multi company test to redirect tests:

LINKS

Task 1958697

PURPOSE

In order to rewrite some tests, remove low-level tests and add coverage
first step is to reorganize a bit test_mail content. Several tests cases
are spread among several files and finding back some feature coverage
tests is not easy.

SPECIFICATIONS

Quickly clean common class and lessen data creation by default. Offer some
tool methods, notably to create portal users used in some tests but not
all, or to create mail templates.

LINKS

Task 1958697