test: add coverage for Batch Item Expiry Status report

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

erpnext/stock/report/batch_item_expiry_status/test_batch_item_expiry_status.py

@@ -0,0 +1,62 @@
+# Copyright (c) 2026, Frappe Technologies Pvt. Ltd. and Contributors
+# See license.txt
+
+import frappe
+
+from erpnext.stock.doctype.item.test_item import make_item
+from erpnext.stock.doctype.stock_entry.stock_entry_utils import make_stock_entry
+from erpnext.stock.report.batch_item_expiry_status.batch_item_expiry_status import execute
+from erpnext.tests.utils import ERPNextTestSuite
+
+
+class TestBatchItemExpiryStatus(ERPNextTestSuite):
+	def run_report(self, **extra):
+		filters = frappe._dict(
+			{
+				"from_date": "2026-01-01",
+				"to_date": "2026-12-31",
+				"company": "_Test Company",
+			}
+		)
+		filters.update(extra)
+		return execute(filters)[1]
+
+	def test_batch_listed_with_balance(self):
+		item = make_item(
+			properties={
+				"is_stock_item": 1,
+				"has_batch_no": 1,
+				"create_new_batch": 1,
+				"batch_number_series": "BIE-.#####",
+				"has_expiry_date": 1,
+				"shelf_life_in_days": 30,
+			}
+		).name
+
+		make_stock_entry(
+			item_code=item,
+			to_warehouse="_Test Warehouse - _TC",
+			qty=10,
+			rate=100,
+			posting_date="2026-06-01",
+		)
+
+		batch_no = frappe.db.get_value("Batch", {"item": item}, "name")
+		self.assertTrue(batch_no, "Stock entry did not auto-create a batch")
+
+		data = self.run_report(item=item)
+
+		# Columns: [item, item_name, batch, stock_uom, quantity, expires_on, expiry_in_days]
+		row = next((r for r in data if r[2] == batch_no), None)
+		self.assertIsNotNone(row, f"Batch {batch_no} not found in report for item {item}")
+
+		self.assertEqual(row[0], item)
+		self.assertEqual(row[2], batch_no)
+		self.assertEqual(row[4], 10)
+		# expiry = batch manufacturing_date + 30 day shelf life; matches the Batch record
+		batch_expiry = frappe.db.get_value("Batch", batch_no, "expiry_date")
+		self.assertIsNotNone(row[5], "Expiry date should be set for a batch with shelf life")
+		self.assertEqual(frappe.utils.getdate(row[5]), frappe.utils.getdate(batch_expiry))
+		# Expiry (In Days) column = days until expiry
+		expected_days = max((frappe.utils.getdate(batch_expiry) - frappe.utils.datetime.date.today()).days, 0)
+		self.assertEqual(row[6], expected_days)