test: test cases to test clash timestamp entries

erpnext/patches.txt

@@ -263,6 +263,7 @@ execute:frappe.rename_doc("Report", "TDS Payable Monthly", "Tax Withholding Deta
 
 [post_model_sync]
 execute:frappe.delete_doc_if_exists('Workspace', 'ERPNext Integrations Settings')
+erpnext.patches.v14_0.update_posting_datetime_and_dropped_indexes
 erpnext.patches.v14_0.rename_ongoing_status_in_sla_documents
 erpnext.patches.v14_0.delete_shopify_doctypes
 erpnext.patches.v14_0.delete_healthcare_doctypes
@@ -357,4 +358,3 @@ erpnext.patches.v15_0.create_advance_payment_status
 erpnext.patches.v14_0.migrate_gl_to_payment_ledger
 erpnext.stock.doctype.delivery_note.patches.drop_unused_return_against_index # 2023-12-20
 erpnext.patches.v14_0.set_maintain_stock_for_bom_item
-erpnext.patches.v14_0.update_posting_datetime_and_dropped_indexes

erpnext/stock/doctype/stock_ledger_entry/test_stock_ledger_entry.py

@@ -2,6 +2,7 @@
 # See license.txt
 
 import json
+import time
 from uuid import uuid4
 
 import frappe
@@ -1154,6 +1155,89 @@ def test_timestamp_clash(self):
 		except Exception as e:
 			self.fail("Double processing of qty for clashing timestamp.")
 
+	def test_previous_sle_with_clashed_timestamp(self):
+
+		item = make_item().name
+		warehouse = "_Test Warehouse - _TC"
+
+		reciept1 = make_stock_entry(
+			item_code=item,
+			to_warehouse=warehouse,
+			qty=100,
+			rate=10,
+			posting_date="2021-01-01",
+			posting_time="02:00:00",
+		)
+
+		time.sleep(3)
+
+		reciept2 = make_stock_entry(
+			item_code=item,
+			to_warehouse=warehouse,
+			qty=5,
+			posting_date="2021-01-01",
+			rate=10,
+			posting_time="02:00:00.1234",
+		)
+
+		sle = frappe.get_all(
+			"Stock Ledger Entry",
+			filters={"voucher_no": reciept1.name},
+			fields=["qty_after_transaction", "actual_qty"],
+		)
+		self.assertEqual(sle[0].qty_after_transaction, 100)
+		self.assertEqual(sle[0].actual_qty, 100)
+
+		sle = frappe.get_all(
+			"Stock Ledger Entry",
+			filters={"voucher_no": reciept2.name},
+			fields=["qty_after_transaction", "actual_qty"],
+		)
+		self.assertEqual(sle[0].qty_after_transaction, 105)
+		self.assertEqual(sle[0].actual_qty, 5)
+
+	def test_backdated_sle_with_same_timestamp(self):
+
+		item = make_item().name
+		warehouse = "_Test Warehouse - _TC"
+
+		reciept1 = make_stock_entry(
+			item_code=item,
+			to_warehouse=warehouse,
+			qty=5,
+			posting_date="2021-01-01",
+			rate=10,
+			posting_time="02:00:00.1234",
+		)
+
+		time.sleep(3)
+
+		# backdated entry with same timestamp but different ms part
+		reciept2 = make_stock_entry(
+			item_code=item,
+			to_warehouse=warehouse,
+			qty=100,
+			rate=10,
+			posting_date="2021-01-01",
+			posting_time="02:00:00",
+		)
+
+		sle = frappe.get_all(
+			"Stock Ledger Entry",
+			filters={"voucher_no": reciept1.name},
+			fields=["qty_after_transaction", "actual_qty"],
+		)
+		self.assertEqual(sle[0].qty_after_transaction, 105)
+		self.assertEqual(sle[0].actual_qty, 5)
+
+		sle = frappe.get_all(
+			"Stock Ledger Entry",
+			filters={"voucher_no": reciept2.name},
+			fields=["qty_after_transaction", "actual_qty"],
+		)
+		self.assertEqual(sle[0].qty_after_transaction, 100)
+		self.assertEqual(sle[0].actual_qty, 100)
+
 	@change_settings("System Settings", {"float_precision": 3, "currency_precision": 2})
 	def test_transfer_invariants(self):
 		"""Extact stock value should be transferred."""