diff --git a/erpnext/subcontracting/doctype/subcontracting_order/test_subcontracting_order.py b/erpnext/subcontracting/doctype/subcontracting_order/test_subcontracting_order.py
index f58c830..5644045 100644
--- a/erpnext/subcontracting/doctype/subcontracting_order/test_subcontracting_order.py
+++ b/erpnext/subcontracting/doctype/subcontracting_order/test_subcontracting_order.py
@@ -1,8 +1,530 @@
 # Copyright (c) 2022, Frappe Technologies Pvt. Ltd. and Contributors
 # See license.txt
 
-# import frappe
+import copy
+
+import frappe
 from frappe.tests.utils import FrappeTestCase
 
+from erpnext.buying.doctype.purchase_order.purchase_order import get_mapped_subcontracting_order
+from erpnext.controllers.tests.test_subcontracting_controller import (
+	get_rm_items,
+	get_subcontracting_order,
+	make_bom_for_subcontracted_items,
+	make_raw_materials,
+	make_service_items,
+	make_stock_in_entry,
+	make_stock_transfer_entry,
+	make_subcontracted_item,
+	make_subcontracted_items,
+	set_backflush_based_on,
+)
+from erpnext.stock.doctype.item.test_item import make_item
+from erpnext.stock.doctype.stock_entry.test_stock_entry import make_stock_entry
+from erpnext.subcontracting.doctype.subcontracting_order.subcontracting_order import (
+	make_rm_stock_entry,
+	make_subcontracting_receipt,
+)
+
+
 class TestSubcontractingOrder(FrappeTestCase):
-	pass
\ No newline at end of file
+	def setUp(self):
+		make_subcontracted_items()
+		make_raw_materials()
+		make_service_items()
+		make_bom_for_subcontracted_items()
+
+	def test_populate_items_table(self):
+		sco = get_subcontracting_order()
+		sco.items = None
+		sco.populate_items_table()
+		self.assertEqual(len(sco.service_items), len(sco.items))
+
+	def test_set_missing_values(self):
+		sco = get_subcontracting_order()
+		before = {sco.total_qty, sco.total, sco.total_additional_costs}
+		sco.total_qty = sco.total = sco.total_additional_costs = 0
+		sco.set_missing_values()
+		after = {sco.total_qty, sco.total, sco.total_additional_costs}
+		self.assertSetEqual(before, after)
+
+	def test_update_status(self):
+		# Draft
+		sco = get_subcontracting_order(do_not_submit=1)
+		self.assertEqual(sco.status, "Draft")
+
+		# Open
+		sco.submit()
+		sco.load_from_db()
+		self.assertEqual(sco.status, "Open")
+
+		# Partial Material Transferred
+		rm_items = get_rm_items(sco.supplied_items)
+		rm_items[0]["qty"] -= 1
+		itemwise_details = make_stock_in_entry(rm_items=rm_items)
+		make_stock_transfer_entry(
+			sco_no=sco.name,
+			rm_items=rm_items,
+			itemwise_details=copy.deepcopy(itemwise_details),
+		)
+		sco.load_from_db()
+		self.assertEqual(sco.status, "Partial Material Transferred")
+
+		# Material Transferred
+		rm_items[0]["qty"] = 1
+		itemwise_details = make_stock_in_entry(rm_items=rm_items)
+		make_stock_transfer_entry(
+			sco_no=sco.name,
+			rm_items=rm_items,
+			itemwise_details=copy.deepcopy(itemwise_details),
+		)
+		sco.load_from_db()
+		self.assertEqual(sco.status, "Material Transferred")
+
+		# Partially Received
+		scr = make_subcontracting_receipt(sco.name)
+		scr.items[0].qty -= 1
+		scr.save()
+		scr.submit()
+		sco.load_from_db()
+		self.assertEqual(sco.status, "Partially Received")
+
+		# Completed
+		scr = make_subcontracting_receipt(sco.name)
+		scr.save()
+		scr.submit()
+		sco.load_from_db()
+		self.assertEqual(sco.status, "Completed")
+
+	def test_make_rm_stock_entry(self):
+		sco = get_subcontracting_order()
+		rm_items = get_rm_items(sco.supplied_items)
+		itemwise_details = make_stock_in_entry(rm_items=rm_items)
+		ste = make_stock_transfer_entry(
+			sco_no=sco.name,
+			rm_items=rm_items,
+			itemwise_details=copy.deepcopy(itemwise_details),
+		)
+		self.assertEqual(len(ste.items), len(rm_items))
+
+	def test_make_rm_stock_entry_for_serial_items(self):
+		service_items = [
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 2",
+				"qty": 5,
+				"rate": 100,
+				"fg_item": "Subcontracted Item SA2",
+				"fg_item_qty": 5,
+			},
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 5",
+				"qty": 6,
+				"rate": 100,
+				"fg_item": "Subcontracted Item SA5",
+				"fg_item_qty": 6,
+			},
+		]
+
+		sco = get_subcontracting_order(service_items=service_items)
+		rm_items = get_rm_items(sco.supplied_items)
+		itemwise_details = make_stock_in_entry(rm_items=rm_items)
+		ste = make_stock_transfer_entry(
+			sco_no=sco.name,
+			rm_items=rm_items,
+			itemwise_details=copy.deepcopy(itemwise_details),
+		)
+		self.assertEqual(len(ste.items), len(rm_items))
+
+	def test_make_rm_stock_entry_for_batch_items(self):
+		service_items = [
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 4",
+				"qty": 5,
+				"rate": 100,
+				"fg_item": "Subcontracted Item SA4",
+				"fg_item_qty": 5,
+			},
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 6",
+				"qty": 6,
+				"rate": 100,
+				"fg_item": "Subcontracted Item SA6",
+				"fg_item_qty": 6,
+			},
+		]
+
+		sco = get_subcontracting_order(service_items=service_items)
+		rm_items = get_rm_items(sco.supplied_items)
+		itemwise_details = make_stock_in_entry(rm_items=rm_items)
+		ste = make_stock_transfer_entry(
+			sco_no=sco.name,
+			rm_items=rm_items,
+			itemwise_details=copy.deepcopy(itemwise_details),
+		)
+		self.assertEqual(len(ste.items), len(rm_items))
+
+	def test_update_reserved_qty_for_subcontracting(self):
+		# Make stock available for raw materials
+		make_stock_entry(target="_Test Warehouse - _TC", qty=10, basic_rate=100)
+		make_stock_entry(
+			target="_Test Warehouse - _TC", item_code="_Test Item Home Desktop 100", qty=20, basic_rate=100
+		)
+		make_stock_entry(
+			target="_Test Warehouse 1 - _TC", item_code="_Test Item", qty=30, basic_rate=100
+		)
+		make_stock_entry(
+			target="_Test Warehouse 1 - _TC",
+			item_code="_Test Item Home Desktop 100",
+			qty=30,
+			basic_rate=100,
+		)
+
+		bin1 = frappe.db.get_value(
+			"Bin",
+			filters={"warehouse": "_Test Warehouse - _TC", "item_code": "_Test Item"},
+			fieldname=["reserved_qty_for_sub_contract", "projected_qty", "modified"],
+			as_dict=1,
+		)
+
+		# Create SCO
+		service_items = [
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 1",
+				"qty": 10,
+				"rate": 100,
+				"fg_item": "_Test FG Item",
+				"fg_item_qty": 10,
+			},
+		]
+		sco = get_subcontracting_order(service_items=service_items)
+
+		bin2 = frappe.db.get_value(
+			"Bin",
+			filters={"warehouse": "_Test Warehouse - _TC", "item_code": "_Test Item"},
+			fieldname=["reserved_qty_for_sub_contract", "projected_qty", "modified"],
+			as_dict=1,
+		)
+
+		self.assertEqual(bin2.reserved_qty_for_sub_contract, bin1.reserved_qty_for_sub_contract + 10)
+		self.assertEqual(bin2.projected_qty, bin1.projected_qty - 10)
+		self.assertNotEqual(bin1.modified, bin2.modified)
+
+		# Create stock transfer
+		rm_items = [
+			{
+				"item_code": "_Test FG Item",
+				"rm_item_code": "_Test Item",
+				"item_name": "_Test Item",
+				"qty": 6,
+				"warehouse": "_Test Warehouse - _TC",
+				"rate": 100,
+				"amount": 600,
+				"stock_uom": "Nos",
+			}
+		]
+		ste = frappe.get_doc(make_rm_stock_entry(sco.name, rm_items))
+		ste.to_warehouse = "_Test Warehouse 1 - _TC"
+		ste.save()
+		ste.submit()
+
+		bin3 = frappe.db.get_value(
+			"Bin",
+			filters={"warehouse": "_Test Warehouse - _TC", "item_code": "_Test Item"},
+			fieldname="reserved_qty_for_sub_contract",
+			as_dict=1,
+		)
+
+		self.assertEqual(bin3.reserved_qty_for_sub_contract, bin2.reserved_qty_for_sub_contract - 6)
+
+		make_stock_entry(
+			target="_Test Warehouse 1 - _TC", item_code="_Test Item", qty=40, basic_rate=100
+		)
+		make_stock_entry(
+			target="_Test Warehouse 1 - _TC",
+			item_code="_Test Item Home Desktop 100",
+			qty=40,
+			basic_rate=100,
+		)
+
+		# Make SCR against the SCO
+		scr = make_subcontracting_receipt(sco.name)
+		scr.save()
+		scr.submit()
+
+		bin4 = frappe.db.get_value(
+			"Bin",
+			filters={"warehouse": "_Test Warehouse - _TC", "item_code": "_Test Item"},
+			fieldname="reserved_qty_for_sub_contract",
+			as_dict=1,
+		)
+
+		self.assertEqual(bin4.reserved_qty_for_sub_contract, bin1.reserved_qty_for_sub_contract)
+
+		# Cancel SCR
+		scr.reload()
+		scr.cancel()
+		bin5 = frappe.db.get_value(
+			"Bin",
+			filters={"warehouse": "_Test Warehouse - _TC", "item_code": "_Test Item"},
+			fieldname="reserved_qty_for_sub_contract",
+			as_dict=1,
+		)
+
+		self.assertEqual(bin5.reserved_qty_for_sub_contract, bin2.reserved_qty_for_sub_contract - 6)
+
+		# Cancel Stock Entry
+		ste.cancel()
+		bin6 = frappe.db.get_value(
+			"Bin",
+			filters={"warehouse": "_Test Warehouse - _TC", "item_code": "_Test Item"},
+			fieldname="reserved_qty_for_sub_contract",
+			as_dict=1,
+		)
+
+		self.assertEqual(bin6.reserved_qty_for_sub_contract, bin1.reserved_qty_for_sub_contract + 10)
+
+		# Cancel PO
+		sco.reload()
+		sco.cancel()
+		bin7 = frappe.db.get_value(
+			"Bin",
+			filters={"warehouse": "_Test Warehouse - _TC", "item_code": "_Test Item"},
+			fieldname="reserved_qty_for_sub_contract",
+			as_dict=1,
+		)
+
+		self.assertEqual(bin7.reserved_qty_for_sub_contract, bin1.reserved_qty_for_sub_contract)
+
+	def test_exploded_items(self):
+		item_code = "_Test Subcontracted FG Item 11"
+		make_subcontracted_item(item_code=item_code)
+
+		service_items = [
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 1",
+				"qty": 1,
+				"rate": 100,
+				"fg_item": item_code,
+				"fg_item_qty": 1,
+			},
+		]
+
+		sco1 = get_subcontracting_order(service_items=service_items, include_exploded_items=1)
+		item_name = frappe.db.get_value("BOM", {"item": item_code}, "name")
+		bom = frappe.get_doc("BOM", item_name)
+		exploded_items = sorted([item.item_code for item in bom.exploded_items])
+		supplied_items = sorted([item.rm_item_code for item in sco1.supplied_items])
+		self.assertEqual(exploded_items, supplied_items)
+
+		sco2 = get_subcontracting_order(service_items=service_items, include_exploded_items=0)
+		supplied_items1 = sorted([item.rm_item_code for item in sco2.supplied_items])
+		bom_items = sorted([item.item_code for item in bom.items])
+		self.assertEqual(supplied_items1, bom_items)
+
+	def test_backflush_based_on_stock_entry(self):
+		item_code = "_Test Subcontracted FG Item 1"
+		make_subcontracted_item(item_code=item_code)
+		make_item("Sub Contracted Raw Material 1", {"is_stock_item": 1, "is_sub_contracted_item": 1})
+
+		set_backflush_based_on("Material Transferred for Subcontract")
+
+		order_qty = 5
+		service_items = [
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 1",
+				"qty": order_qty,
+				"rate": 100,
+				"fg_item": item_code,
+				"fg_item_qty": order_qty,
+			},
+		]
+
+		sco = get_subcontracting_order(service_items=service_items)
+
+		make_stock_entry(
+			target="_Test Warehouse - _TC", item_code="_Test Item Home Desktop 100", qty=20, basic_rate=100
+		)
+		make_stock_entry(
+			target="_Test Warehouse - _TC", item_code="Test Extra Item 1", qty=100, basic_rate=100
+		)
+		make_stock_entry(
+			target="_Test Warehouse - _TC", item_code="Test Extra Item 2", qty=10, basic_rate=100
+		)
+		make_stock_entry(
+			target="_Test Warehouse - _TC",
+			item_code="Sub Contracted Raw Material 1",
+			qty=10,
+			basic_rate=100,
+		)
+
+		rm_items = [
+			{
+				"item_code": item_code,
+				"rm_item_code": "Sub Contracted Raw Material 1",
+				"item_name": "_Test Item",
+				"qty": 10,
+				"warehouse": "_Test Warehouse - _TC",
+				"stock_uom": "Nos",
+			},
+			{
+				"item_code": item_code,
+				"rm_item_code": "_Test Item Home Desktop 100",
+				"item_name": "_Test Item Home Desktop 100",
+				"qty": 20,
+				"warehouse": "_Test Warehouse - _TC",
+				"stock_uom": "Nos",
+			},
+			{
+				"item_code": item_code,
+				"rm_item_code": "Test Extra Item 1",
+				"item_name": "Test Extra Item 1",
+				"qty": 10,
+				"warehouse": "_Test Warehouse - _TC",
+				"stock_uom": "Nos",
+			},
+			{
+				"item_code": item_code,
+				"rm_item_code": "Test Extra Item 2",
+				"stock_uom": "Nos",
+				"qty": 10,
+				"warehouse": "_Test Warehouse - _TC",
+				"item_name": "Test Extra Item 2",
+			},
+		]
+
+		ste = frappe.get_doc(make_rm_stock_entry(sco.name, rm_items))
+		ste.submit()
+
+		scr = make_subcontracting_receipt(sco.name)
+		received_qty = 2
+
+		# partial receipt
+		scr.get("items")[0].qty = received_qty
+		scr.save()
+		scr.submit()
+
+		transferred_items = sorted(
+			[item.item_code for item in ste.get("items") if ste.subcontracting_order == sco.name]
+		)
+		issued_items = sorted([item.rm_item_code for item in scr.get("supplied_items")])
+
+		self.assertEqual(transferred_items, issued_items)
+		self.assertEqual(scr.get_supplied_items_cost(scr.get("items")[0].name), 2000)
+
+		transferred_rm_map = frappe._dict()
+		for item in rm_items:
+			transferred_rm_map[item.get("rm_item_code")] = item
+
+		set_backflush_based_on("BOM")
+
+	def test_supplied_qty(self):
+		item_code = "_Test Subcontracted FG Item 5"
+		make_item("Sub Contracted Raw Material 4", {"is_stock_item": 1, "is_sub_contracted_item": 1})
+
+		make_subcontracted_item(item_code=item_code, raw_materials=["Sub Contracted Raw Material 4"])
+
+		set_backflush_based_on("Material Transferred for Subcontract")
+
+		order_qty = 250
+		service_items = [
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 1",
+				"qty": order_qty,
+				"rate": 100,
+				"fg_item": item_code,
+				"fg_item_qty": order_qty,
+			},
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Service Item 1",
+				"qty": order_qty,
+				"rate": 100,
+				"fg_item": item_code,
+				"fg_item_qty": order_qty,
+			},
+		]
+
+		sco = get_subcontracting_order(service_items=service_items)
+
+		# Material receipt entry for the raw materials which will be send to supplier
+		make_stock_entry(
+			target="_Test Warehouse - _TC",
+			item_code="Sub Contracted Raw Material 4",
+			qty=500,
+			basic_rate=100,
+		)
+
+		rm_items = [
+			{
+				"item_code": item_code,
+				"rm_item_code": "Sub Contracted Raw Material 4",
+				"item_name": "_Test Item",
+				"qty": 250,
+				"warehouse": "_Test Warehouse - _TC",
+				"stock_uom": "Nos",
+				"name": sco.supplied_items[0].name,
+			},
+			{
+				"item_code": item_code,
+				"rm_item_code": "Sub Contracted Raw Material 4",
+				"item_name": "_Test Item",
+				"qty": 250,
+				"warehouse": "_Test Warehouse - _TC",
+				"stock_uom": "Nos",
+			},
+		]
+
+		# Raw Materials transfer entry from stores to supplier's warehouse
+		ste = frappe.get_doc(make_rm_stock_entry(sco.name, rm_items))
+		ste.submit()
+
+		# Test sco_rm_detail field has value or not
+		for item_row in ste.items:
+			self.assertEqual(item_row.sco_rm_detail, sco.supplied_items[item_row.idx - 1].name)
+
+		sco.load_from_db()
+		for row in sco.supplied_items:
+			# Valid that whether transferred quantity is matching with supplied qty or not in the subcontracting order
+			self.assertEqual(row.supplied_qty, 250.0)
+
+		set_backflush_based_on("BOM")
+
+
+def create_subcontracting_order(**args):
+	args = frappe._dict(args)
+	sco = get_mapped_subcontracting_order(source_name=args.po_name)
+
+	for item in sco.items:
+		item.include_exploded_items = args.get("include_exploded_items", 1)
+
+	if args.get("warehouse"):
+		for item in sco.items:
+			item.warehouse = args.warehouse
+	else:
+		warehouse = frappe.get_value("Purchase Order", args.po_name, "set_warehouse")
+		if warehouse:
+			for item in sco.items:
+				item.warehouse = warehouse
+		else:
+			po = frappe.get_doc("Purchase Order", args.po_name)
+			warehouses = []
+			for item in po.items:
+				warehouses.append(item.warehouse)
+			else:
+				for idx, val in enumerate(sco.items):
+					val.warehouse = warehouses[idx]
+
+	if not args.do_not_save:
+		sco.insert()
+		if not args.do_not_submit:
+			sco.submit()
+
+	return sco
\ No newline at end of file