test: Improve test case for not coping payment terms

erpnext/buying/doctype/purchase_order/purchase_order.py

@@ -471,6 +471,7 @@ def get_mapped_purchase_invoice(source_name, target_doc=None, ignore_permissions
 				"party_account_currency": "party_account_currency",
 				"supplier_warehouse":"supplier_warehouse"
 			},
+			"field_no_map" : ["payment_terms_template"],
 			"validation": {
 				"docstatus": ["=", 1],
 			}

erpnext/buying/doctype/purchase_order/test_purchase_order.py

@@ -633,13 +633,17 @@ class TestPurchaseOrder(unittest.TestCase):
 				raise Exception
 
 	def test_terms_are_not_copied_if_automatically_fetch_payment_terms_is_unchecked(self):
-		po = create_purchase_order()
+		po = create_purchase_order(do_not_save=1)
-
+		po.payment_terms_template = '_Test Payment Term Template'
-		self.assertTrue(po.get('payment_schedule'))
+		po.save()
+		po.submit()
 
+		company = frappe.get_doc('Company', '_Test Company', 'payment_terms', '_Test Payment Term Template 1')
 		pi = make_pi_from_po(po.name)
+		pi.save()
 
-		self.assertFalse(pi.get('payment_schedule'))
+		self.assertEqual(pi.get('payment_terms_template'), '_Test Payment Term Template 1')
+		frappe.db.set_value('Company', '_Test Company', 'payment_terms', '')
 
 	def test_terms_copied(self):
 		po = create_purchase_order(do_not_save=1)

erpnext/selling/doctype/sales_order/sales_order.py

@@ -670,6 +670,7 @@ def make_sales_invoice(source_name, target_doc=None, ignore_permissions=False):
 				"party_account_currency": "party_account_currency",
 				"payment_terms_template": "payment_terms_template"
 			},
+			"field_no_map": ["payment_terms_template"],
 			"validation": {
 				"docstatus": ["=", 1]
 			}