test: add coverage for Purchase Receipt Trends report

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

erpnext/stock/report/purchase_receipt_trends/test_purchase_receipt_trends.py

@@ -0,0 +1,40 @@
+# 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.purchase_receipt.test_purchase_receipt import make_purchase_receipt
+from erpnext.stock.report.purchase_receipt_trends.purchase_receipt_trends import execute
+from erpnext.tests.utils import ERPNextTestSuite
+
+
+class TestPurchaseReceiptTrends(ERPNextTestSuite):
+	def run_report(self, **extra):
+		filters = frappe._dict(
+			{
+				"company": "_Test Company",
+				"fiscal_year": "_Test Fiscal Year 2026",
+				"period": "Yearly",
+				"based_on": "Item",
+				"group_by": "",
+			}
+		)
+		filters.update(extra)
+		return execute(filters)[1]
+
+	def test_receipt_qty_in_trend(self):
+		item = make_item(properties={"is_stock_item": 1, "is_purchase_item": 1}).name
+		make_purchase_receipt(
+			item_code=item, qty=10, rate=100, company="_Test Company", posting_date="2026-06-01"
+		)
+
+		data = self.run_report()
+
+		# Row layout for based_on="Item", Yearly, no group_by:
+		# [item_code, item_name, currency, FY(Qty), FY(Amt), Total(Qty), Total(Amt)]
+		row = next(r for r in data if r[0] == item)
+		self.assertEqual(row[3], 10)  # fiscal-year qty
+		self.assertEqual(row[4], 1000)  # fiscal-year amount (10 * 100)
+		self.assertEqual(row[5], 10)  # Total(Qty)
+		self.assertEqual(row[6], 1000)  # Total(Amt)