[IMP] base: Clear precommits on test cleanup

Precommit hooks would stock data until a call to ``cr.flush`` was made.
Notably, this happens when the ``assertRaises`` method is called.
Functions were applied on records already cleared from the cache.

This change adds a cleanup call for `TransactionCase` as it keeps
the same cursor for all tests. Cursor precommits can now
be safely executed inside tests.

Task-2834304

Forward port of #117555

closes odoo/odoo#118290

X-original-commit: ff5d0c75fcea5842c5236b1b3f7480ef5a3dc415
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>
Signed-off-by: Thiry Renaud (reth) <reth@odoo.com>

odoo/tests/common.py

@@ -28,7 +28,7 @@ import time
 import unittest
 from . import case
 import warnings
-from collections import defaultdict
+from collections import defaultdict, deque
 from concurrent.futures import Future, CancelledError, wait
 try:
     from concurrent.futures import InvalidStateError
@@ -735,6 +735,17 @@ class TransactionCase(BaseCase):
 
         self.addCleanup(self.registry.clear_caches)
 
+        # This prevents precommit functions and data from piling up
+        # until cr.flush is called in 'assertRaises' clauses
+        # (these are not cleared in self.env.clear or envs.clear)
+        cr = self.env.cr
+
+        def _reset(cb, funcs, data):
+            cb._funcs = funcs
+            cb.data = data
+        for callback in [cr.precommit, cr.postcommit, cr.prerollback, cr.postrollback]:
+            self.addCleanup(_reset, callback, deque(callback._funcs), dict(callback.data))
+
         # flush everything in setUpClass before introducing a savepoint
         self.env.flush_all()