[FIX] stock_available_to_promise_release: normal outgoing are mergeable

outgoing moves from unreleasable pickings are mergeable by default. This fix is required to avoid to disalbe the merge of moves from outgoing picking when the module is installed but the associated stock.rule is not configured to defer the pull of not available qty

stock_available_to_promise_release/models/stock_move.py

@@ -787,7 +787,9 @@ def write(self, vals):
     def _is_mergeable(self):
         self.ensure_one()
         return self.state not in ("done", "cancel") and (
-            self.picking_type_id.code != "outgoing" or self.unrelease_allowed
+            self.picking_type_id.code != "outgoing"
+            or not self._is_unreleaseable()
+            or self.unrelease_allowed
         )
 
     def _update_candidate_moves_list(self, candidate_moves):

stock_available_to_promise_release/tests/test_merge_moves.py

@@ -136,3 +136,15 @@ def test_unrelease_at_move_merge_merged(self):
         self.assertEqual(1, len(move))
         self.assertEqual(2 + original_qty_1 + original_qty_2, move.product_uom_qty)
         self.assertEqual(2, move.move_line_ids.qty_done)
+
+    def test_default_merge(self):
+        # check that the merge is still working when the available_to_promise_defer_pull
+        # is False
+        self.wh.delivery_route_id.write(
+            {
+                "available_to_promise_defer_pull": False,
+            }
+        )
+        # run a new procurement for the same product in the shipment 1
+        self._procure(2)
+        self.assertEqual(1, len(self.shipping1.move_ids))