Add maturity date

modules/purchase_trade/tests/test_module.py

@@ -3293,6 +3293,21 @@ class PurchaseTradeTestCase(ModuleTestCase):
             'CH36 0021 5215 2487 7461 D')
         self.assertEqual(invoice.report_melya_bank_swift, 'UBSWCHZH80A')
 
+    def test_invoice_melya_maturity_date_uses_lines_to_pay(self):
+        'invoice_melya maturity date uses the earliest line to pay maturity'
+        Invoice = Pool().get('account.invoice')
+
+        invoice = Invoice()
+        invoice.lines_to_pay = [
+            Mock(maturity_date=datetime.date(2026, 9, 9)),
+            Mock(maturity_date=datetime.date(2026, 8, 9)),
+            Mock(maturity_date=None),
+        ]
+
+        self.assertEqual(
+            invoice.report_melya_maturity_date,
+            datetime.date(2026, 8, 9))
+
     def test_sale_report_deal_uses_purchase_and_sale_numbers(self):
         'sale deal number includes the linked purchase number'
         Sale = Pool().get('sale.sale')