[MERGE] various: Make the test suite demo data independant

Purpose
=======

This is the first huge step to improve the test suite in several ways:

- Make them demo data independent, allowing to modify the demo data without having to adapt the tests depending on it. It also allows to have a beautiful + convenient demo dataset to make a demonstration, and to configure complex data in the tests to manage the corner cases.
- Improve the test performances by converting them into SavepointCase. Each test will be rollbacked to it's initial state, after the setUpClass call. That way the different data are not re-created at each test for nothing.
- Introduce several test classes in base/tests/common.py to launch a TransactionCase, HttpCase or SavepointCase test with an available demo user, portal user or a large set of partners.
- This is the first step to tend to a rolling release process, allowing to execute the tests (or a subset of the tests) on a migrated base, for example.

closes odoo/odoo#39868

Taskid: 2075739
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/odoo/addons/base/tests/test_cache.py b/odoo/addons/base/tests/test_cache.py
index d6c18dd4132..0efa36ca48a 100644
--- a/odoo/addons/base/tests/test_cache.py
+++ b/odoo/addons/base/tests/test_cache.py
@@ -6,11 +6,12 @@ import platform
 import psutil
 import unittest
 
+from odoo.addons.base.tests.common import TransactionCaseWithUserDemo
 from odoo.exceptions import CacheMiss
 from odoo.tests.common import TransactionCase
 
 
-class TestRecordCache(TransactionCase):
+class TestRecordCache(TransactionCaseWithUserDemo):
 
     def test_cache(self):
         """ Check the record cache object. """
@@ -37,7 +38,7 @@ class TestRecordCache(TransactionCase):
             check1(record, ref, ref_val)
 
         foo1, bar1 = Model.browse([1, 2])
-        foo2, bar2 = Model.with_user(self.env.ref('base.user_demo')).browse([1, 2])
+        foo2, bar2 = Model.with_user(self.user_demo).browse([1, 2])
         self.assertNotEqual(foo1.env.uid, foo2.env.uid)
 
         # cache is empty