[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, 4 insertions, 0 deletions

diff --git a/addons/hr_holidays/tests/test_automatic_leave_dates.py b/addons/hr_holidays/tests/test_automatic_leave_dates.py
index a709be09f9a..cacb1975b7d 100644
--- a/addons/hr_holidays/tests/test_automatic_leave_dates.py
+++ b/addons/hr_holidays/tests/test_automatic_leave_dates.py
@@ -154,6 +154,7 @@ class TestAutomaticLeaveDates(TestHrHolidaysBase):
             self.assertEqual(leave_form.number_of_hours_display, 8)
 
     def test_attendance_next_day(self):
+        self.env.user.tz = 'Europe/Brussels'
         calendar = self.env['resource.calendar'].create({
             'name': 'auto next day',
             'attendance_ids': [(5, 0, 0),
@@ -183,6 +184,7 @@ class TestAutomaticLeaveDates(TestHrHolidaysBase):
             self.assertEqual(leave_form.date_to, datetime(2019, 9, 2, 10, 0, 0))
 
     def test_attendance_previous_day(self):
+        self.env.user.tz = 'Europe/Brussels'
         calendar = self.env['resource.calendar'].create({
             'name': 'auto next day',
             'attendance_ids': [(5, 0, 0),
@@ -212,6 +214,7 @@ class TestAutomaticLeaveDates(TestHrHolidaysBase):
             self.assertEqual(leave_form.date_to, datetime(2019, 9, 3, 10, 0, 0))
 
     def test_2weeks_calendar(self):
+        self.env.user.tz = 'Europe/Brussels'
         calendar = self.env['resource.calendar'].create({
             'name': 'auto next day',
             'two_weeks_calendar': True,
@@ -265,6 +268,7 @@ class TestAutomaticLeaveDates(TestHrHolidaysBase):
             self.assertEqual(leave_form.date_to, datetime(2019, 9, 9, 10, 0, 0))
 
     def test_2weeks_calendar_next_week(self):
+        self.env.user.tz = 'Europe/Brussels'
         calendar = self.env['resource.calendar'].create({
             'name': 'auto next day',
             'two_weeks_calendar': True,