[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, 5 insertions, 1 deletions

diff --git a/addons/purchase_stock/tests/test_purchase_order_process.py b/addons/purchase_stock/tests/test_purchase_order_process.py
index 5ea75e32d28..4689735882b 100644
--- a/addons/purchase_stock/tests/test_purchase_order_process.py
+++ b/addons/purchase_stock/tests/test_purchase_order_process.py
@@ -7,7 +7,11 @@ class TestPurchaseOrderProcess(TestPurchase):
         """ Test cancel purchase order with group user."""
 
         # In order to test the cancel flow,start it from canceling confirmed purchase order.
-        po_edit_with_user = self.env.ref('purchase.purchase_order_5').with_user(self.res_users_purchase_user)
+        purchase_order = self.env['purchase.order'].create({
+            'partner_id': self.env['res.partner'].create({'name': 'My Partner'}).id,
+            'state': 'draft',
+        })
+        po_edit_with_user = purchase_order.with_user(self.res_users_purchase_user)
 
         # Confirm the purchase order.
         po_edit_with_user.button_confirm()