test: add coverage for Stock Projected Qty report

The Stock Projected Qty report had no test file. Add tests for projected
qty rolling up actual + ordered, shortage qty derived from the warehouse
reorder level, and item filtering.

erpnext/stock/report/stock_projected_qty/test_stock_projected_qty.py

@@ -0,0 +1,61 @@
+# Copyright (c) 2026, Frappe Technologies Pvt. Ltd. and Contributors
+# See license.txt
+
+import frappe
+
+from erpnext.buying.doctype.purchase_order.test_purchase_order import create_purchase_order
+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.stock_projected_qty.stock_projected_qty import execute
+from erpnext.tests.utils import ERPNextTestSuite
+
+WAREHOUSE = "_Test Warehouse - _TC"
+
+
+class TestStockProjectedQty(ERPNextTestSuite):
+	"""Correctness tests for the Stock Projected Qty report (a current-Bin snapshot)."""
+
+	def run_report(self, item_code):
+		filters = frappe._dict(company="_Test Company", item_code=item_code)
+		columns, data = execute(filters)
+		fields = [column["fieldname"] for column in columns]
+		return [dict(zip(fields, row, strict=False)) for row in data]
+
+	def test_projected_qty_includes_actual_and_ordered(self):
+		item = make_item().name
+		make_stock_entry(item_code=item, qty=10, to_warehouse=WAREHOUSE, basic_rate=100)
+		create_purchase_order(item_code=item, qty=5, rate=100, warehouse=WAREHOUSE)
+
+		row = self.run_report(item)[0]
+		self.assertEqual(row["actual_qty"], 10)
+		self.assertEqual(row["ordered_qty"], 5)
+		self.assertEqual(row["projected_qty"], 15)
+
+	def test_shortage_qty_from_reorder_level(self):
+		item = make_item().name
+		doc = frappe.get_doc("Item", item)
+		doc.append(
+			"reorder_levels",
+			{
+				"warehouse": WAREHOUSE,
+				"warehouse_reorder_level": 20,
+				"warehouse_reorder_qty": 15,
+				"material_request_type": "Purchase",
+			},
+		)
+		doc.save()
+		make_stock_entry(item_code=item, qty=10, to_warehouse=WAREHOUSE, basic_rate=100)
+
+		row = self.run_report(item)[0]
+		self.assertEqual(row["re_order_level"], 20)
+		self.assertEqual(row["projected_qty"], 10)
+		self.assertEqual(row["shortage_qty"], 10)  # reorder level 20 - projected 10
+
+	def test_item_filter_returns_only_requested_item(self):
+		item_a = make_item().name
+		item_b = make_item().name
+		make_stock_entry(item_code=item_a, qty=5, to_warehouse=WAREHOUSE, basic_rate=100)
+		make_stock_entry(item_code=item_b, qty=7, to_warehouse=WAREHOUSE, basic_rate=100)
+
+		rows = self.run_report(item_a)
+		self.assertEqual({row["item_code"] for row in rows}, {item_a})