[FIX] Monkeypatch TestCursor in auth_brute_force's tests

By implementing nestable savepoints in the TestCursor (courtesy of
Holger Brunn), the failed login attempts are preserved during the test.

auth_brute_force/tests/test_brute_force.py

@@ -94,9 +94,68 @@ class BruteForceCase(HttpCase):
         ])
         return set(addons) - set(found.mapped("name"))
 
+    def patch_cursor(self):
+        """ Monkeypatch Holger's https://github.com/odoo/odoo/pull/20033
+        onto the current TestCursor so that we can fully test this module's
+        functionality """
+
+        def acquire(cursor):
+            cursor._depth += 1
+            cursor._lock.acquire()
+            cursor.execute("SAVEPOINT test_cursor%d" % cursor._depth)
+
+        def release(cursor):
+            cursor.execute("RELEASE SAVEPOINT test_cursor%d" % cursor._depth)
+            cursor._depth -= 1
+            cursor._lock.release()
+
+        def close(cursor):
+            # Do not rollback the cursor on close
+            cursor.release()
+
+        def commit(cursor):
+            cursor.execute("RELEASE SAVEPOINT test_cursor%d" % cursor._depth)
+            cursor.execute("SAVEPOINT test_cursor%d" % cursor._depth)
+
+        def rollback(cursor):
+            cursor.execute(
+                "ROLLBACK TO SAVEPOINT test_cursor%d" % cursor._depth)
+            cursor.execute("SAVEPOINT test_cursor%d" % cursor._depth)
+
+        with self.cursor() as cursor:
+            cursor.execute("SAVEPOINT test_cursor0")
+            cursor._depth = 1
+            cursor.execute("SAVEPOINT test_cursor%d" % cursor._depth)
+
+            cursor.__acquire = cursor.acquire
+            cursor.__release = cursor.release
+            cursor.__commit = cursor.commit
+            cursor.__rollback = cursor.rollback
+            cursor.__close = cursor.close
+            cursor.acquire = lambda: acquire(cursor)
+            cursor.release = lambda: release(cursor)
+            cursor.commit = lambda: commit(cursor)
+            cursor.rollback = lambda: rollback(cursor)
+            cursor.close = lambda: close(cursor)
+
+    def unpatch_cursor(self):
+        with self.cursor() as cursor:
+            cursor.acquire = cursor.__acquire
+            cursor.release = cursor.__release
+            cursor.commit = cursor.__commit
+            cursor.rollback = cursor.__rollback
+            cursor.close = cursor.__close
+
     @skip_unless_addons_installed("web")
     @mute_logger(*GARBAGE_LOGGERS)
     def test_web_login_existing(self, *args):
+        self.patch_cursor()
+        try:
+            self._test_web_login_existing(*args)
+        finally:
+            self.unpatch_cursor()
+
+    def _test_web_login_existing(self, *args):
         """Remote is banned with real user on web login form."""
         data1 = {
             "login": "admin",
@@ -166,6 +225,13 @@ class BruteForceCase(HttpCase):
     @skip_unless_addons_installed("web")
     @mute_logger(*GARBAGE_LOGGERS)
     def test_web_login_unexisting(self, *args):
+        self.patch_cursor()
+        try:
+            self._test_web_login_unexisting(*args)
+        finally:
+            self._unpatch_cursor()
+
+    def _test_web_login_unexisting(self, *args):
         """Remote is banned with fake user on web login form."""
         data1 = {
             "login": "administrator",  # Wrong
@@ -226,6 +292,14 @@ class BruteForceCase(HttpCase):
 
     @mute_logger(*GARBAGE_LOGGERS)
     def test_xmlrpc_login_existing(self, *args):
+        self.patch_cursor()
+        try:
+            self._test_xmlrpc_login_existing(*args)
+        finally:
+            self.unpatch_cursor()
+
+    @mute_logger(*GARBAGE_LOGGERS)
+    def _test_xmlrpc_login_existing(self, *args):
         """Remote is banned with real user on XML-RPC login."""
         data1 = {
             "login": "admin",
@@ -285,6 +359,13 @@ class BruteForceCase(HttpCase):
 
     @mute_logger(*GARBAGE_LOGGERS)
     def test_xmlrpc_login_unexisting(self, *args):
+        self.patch_cursor()
+        try:
+            self._test_xmlrpc_login_unexisting(*args)
+        finally:
+            self.unpatch_cursor()
+
+    def _test_xmlrpc_login_unexisting(self, *args):
         """Remote is banned with fake user on XML-RPC login."""
         data1 = {
             "login": "administrator",  # Wrong