fix: test case

Author: mihir-kandoi

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -112,7 +112,7 @@ def setUpClass(cls):
 	def tearDownClass(self):
 		unlink_payment_on_cancel_of_invoice(0)
 
-	def test_payment_date_recalculate(self):
+	def test_payment_date_recalculation(self):
 		posting_date = getdate()
 		new_posting_date = add_days(posting_date, 5)
 
@@ -123,29 +123,25 @@ def test_payment_date_recalculate(self):
 				"invoice_portion": 100,
 				"credit_days": 2,
 			}
-		).insert()
+		).save()
 
 		ptt = frappe.get_doc(
 			{
 				"doctype": "Payment Terms Template",
 				"template_name": "Test Template Recalc",
 				"terms": [{"payment_term": payment_term.name, "invoice_portion": 100, "credit_days": 2}],
 			}
-		).insert()
+		).save()
 
 		si = create_sales_invoice(do_not_save=1)
+		si.set_posting_time = 1
 		si.posting_date = posting_date
 		si.payment_terms_template = ptt.name
-		si.set_missing_values()
-		si.set_payment_schedule()
-		si.set_due_date()
-		si.insert()
-
+		si.save()
 		self.assertEqual(si.payment_schedule[0].due_date, add_days(posting_date, 2))
 
-		si = frappe.get_doc("Sales Invoice", si.name)
-
-		recalculate_payment_due_date(new_posting_date, si.payment_schedule)
+		si.update({"posting_date": new_posting_date})
+		si.save()
 
 		self.assertEqual(si.payment_schedule[0].due_date, add_days(new_posting_date, 2))