[ADD] testing the 'reserve document number on picking' feature

l10n_br_stock_account/tests/test_invoicing_picking.py

@@ -569,3 +569,24 @@ def test_simples_nacional(self):
             invoice.fiscal_document_id,
             "Simples Nacional case should has Fiscal Document.",
         )
+
+    def test_generate_document_number_on_validate(self):
+        """Test Invoicing Picking"""
+        self._change_user_company(self.env.ref("base.main_company"))
+        picking = self.env.ref("l10n_br_stock_account.main_company-picking_1")
+        self._run_fiscal_onchanges(picking)
+        # Testa os Impostos Dedutiveis
+        picking.fiscal_operation_id.deductible_taxes = True
+        picking.picking_type_id.pre_generate_fiscal_document_number = "pack"
+
+        self._run_fiscal_onchanges(picking)
+        picking.action_confirm()
+        picking.action_assign()
+        for move in picking.move_ids_without_package:
+            self._run_fiscal_line_onchanges(move)
+            move.quantity_done = move.product_uom_qty
+
+        picking.action_put_in_pack()
+        picking.button_validate()
+        picking.set_to_be_invoiced()
+        self.assertTrue(picking.document_number)