refactor: add bare unit test cases

mainly for LLMs to catch up with the convention

erpnext/subcontracting/doctype/subcontracting_bom/test_subcontracting_bom.py

@@ -2,7 +2,16 @@
 # See license.txt
 
 import frappe
-from frappe.tests import IntegrationTestCase
+from frappe.tests import IntegrationTestCase, UnitTestCase
+
+
+class UnitTestSubcontractingBom(UnitTestCase):
+	"""
+	Unit tests for SubcontractingBom.
+	Use this class for testing individual functions and methods.
+	"""
+
+	pass
 
 
 class TestSubcontractingBOM(IntegrationTestCase):

erpnext/subcontracting/doctype/subcontracting_order/test_subcontracting_order.py

@@ -5,7 +5,7 @@ import copy
 from collections import defaultdict
 
 import frappe
-from frappe.tests import IntegrationTestCase
+from frappe.tests import IntegrationTestCase, UnitTestCase
 from frappe.utils import flt
 
 from erpnext.buying.doctype.purchase_order.purchase_order import get_mapped_subcontracting_order
@@ -32,6 +32,15 @@ from erpnext.subcontracting.doctype.subcontracting_order.subcontracting_order im
 )
 
 
+class UnitTestSubcontractingOrder(UnitTestCase):
+	"""
+	Unit tests for SubcontractingOrder.
+	Use this class for testing individual functions and methods.
+	"""
+
+	pass
+
+
 class TestSubcontractingOrder(IntegrationTestCase):
 	def setUp(self):
 		make_subcontracted_items()

erpnext/subcontracting/doctype/subcontracting_receipt/test_subcontracting_receipt.py

@@ -5,7 +5,7 @@
 import copy
 
 import frappe
-from frappe.tests import IntegrationTestCase
+from frappe.tests import IntegrationTestCase, UnitTestCase
 from frappe.utils import add_days, cint, flt, nowtime, today
 
 import erpnext
@@ -40,6 +40,15 @@ from erpnext.subcontracting.doctype.subcontracting_order.subcontracting_order im
 )
 
 
+class UnitTestSubcontractingReceipt(UnitTestCase):
+	"""
+	Unit tests for SubcontractingReceipt.
+	Use this class for testing individual functions and methods.
+	"""
+
+	pass
+
+
 class TestSubcontractingReceipt(IntegrationTestCase):
 	def setUp(self):
 		make_subcontracted_items()