fix: added test for drop ship partial order

erpnext/selling/doctype/sales_order/test_sales_order.py

@@ -772,6 +772,56 @@ class TestSalesOrder(unittest.TestCase):
 		so.load_from_db()
 		so.cancel()
 
+	def test_drop_shipping_partial_order(self):
+		from erpnext.selling.doctype.sales_order.sales_order import make_purchase_order_for_default_supplier, \
+			update_status as so_update_status
+
+		# make items
+		po_item1 = make_item("_Test Item for Drop Shipping 1", {"is_stock_item": 1, "delivered_by_supplier": 1})
+		po_item2 = make_item("_Test Item for Drop Shipping 2", {"is_stock_item": 1, "delivered_by_supplier": 1})
+
+		so_items = [
+			{
+				"item_code": po_item1.item_code,
+				"warehouse": "",
+				"qty": 2,
+				"rate": 400,
+				"delivered_by_supplier": 1,
+				"supplier": '_Test Supplier'
+			},
+			{
+				"item_code": po_item2.item_code,
+				"warehouse": "_Test Warehouse - _TC",
+				"qty": 2,
+				"rate": 300,
+				"conversion_factor": 1.0
+			}
+		]
+
+		# create so and po
+		so = make_sales_order(item_list=so_items, do_not_submit=True)
+		so.submit()
+
+		# create po for only one item
+		po = make_purchase_order_for_default_supplier(so.name, selected_items=[so_items[0]])
+		po.submit()
+
+		self.assertEqual(so.customer, po.customer)
+		self.assertEqual(po.items[0].sales_order, so.name)
+		self.assertEqual(po.items[0].item_code, po_item.item_code)
+		#test po_item length
+		self.assertEqual(len(po.items), 1)
+
+		# create po for remaining item
+		po = make_purchase_order_for_default_supplier(so.name, selected_items=[so_items[1]])
+		po.submit()
+
+		# teardown
+		so_update_status("Draft", so.name)
+		po.cancel()
+		so.load_from_db()
+		so.cancel()
+
 	def test_reserved_qty_for_closing_so(self):
 		bin = frappe.get_all("Bin", filters={"item_code": "_Test Item", "warehouse": "_Test Warehouse - _TC"},
 			fields=["reserved_qty"])