test: Test for mapped SE and fix for failing tests

- Remove `set_missing_values` from mapper util function since a lot of item data is set after this function is run
- `split_batch` can skip `set_missing_values` since no warehouses are set on mapping and relies on user input

erpnext/stock/doctype/batch/batch.py

@@ -244,7 +244,6 @@ def split_batch(batch_no, item_code, warehouse, qty, new_batch_id=None):
 		)
 	)
 	stock_entry.set_stock_entry_type()
-	stock_entry.set_missing_values()
 	stock_entry.insert()
 	stock_entry.submit()
 

erpnext/stock/doctype/stock_entry/stock_entry_utils.py

@@ -132,7 +132,6 @@ def make_stock_entry(**args):
 	)
 
 	s.set_stock_entry_type()
-	s.set_missing_values()
 
 	if not args.do_not_save:
 		s.insert()

erpnext/stock/doctype/stock_entry/test_stock_entry.py

@@ -1424,6 +1424,25 @@ class TestStockEntry(FrappeTestCase):
 
 		self.assertRaises(frappe.ValidationError, se.save)
 
+	def test_mapped_stock_entry(self):
+		"Check if rate and stock details are populated in mapped SE given warehouse."
+		from erpnext.stock.doctype.purchase_receipt.purchase_receipt import make_stock_entry
+		from erpnext.stock.doctype.purchase_receipt.test_purchase_receipt import make_purchase_receipt
+
+		item_code = "_TestMappedItem"
+		create_item(item_code, is_stock_item=True)
+
+		pr = make_purchase_receipt(
+			item_code=item_code, qty=2, rate=100, company="_Test Company", warehouse="Stores - _TC"
+		)
+
+		mapped_se = make_stock_entry(pr.name)
+
+		self.assertEqual(mapped_se.items[0].s_warehouse, "Stores - _TC")
+		self.assertEqual(mapped_se.items[0].actual_qty, 2)
+		self.assertEqual(mapped_se.items[0].basic_rate, 100)
+		self.assertEqual(mapped_se.items[0].basic_amount, 200)
+
 
 def make_serialized_item(**args):
 	args = frappe._dict(args)