test: Customer-wise Item Price report coverage

erpnext/selling/report/customer_wise_item_price/test_customer_wise_item_price.py

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+# Copyright (c) 2026, Frappe Technologies Pvt. Ltd. and Contributors
+# See license.txt
+
+import frappe
+
+from erpnext.selling.report.customer_wise_item_price.customer_wise_item_price import execute
+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.tests.utils import ERPNextTestSuite
+
+PRICE_LIST = "Standard Selling"
+
+
+class TestCustomerWiseItemPrice(ERPNextTestSuite):
+	"""The report lists sales items with the selling rate from the customer's price
+	list and the available stock (summed across warehouses)."""
+
+	def setUp(self):
+		self.item = make_item(properties={"is_stock_item": 1, "is_sales_item": 1}).name
+		self.customer = self.create_customer()
+		frappe.get_doc(
+			{
+				"doctype": "Item Price",
+				"item_code": self.item,
+				"price_list": PRICE_LIST,
+				"selling": 1,
+				"price_list_rate": 250,
+			}
+		).insert()
+		make_stock_entry(item_code=self.item, to_warehouse="Stores - _TC", qty=10, rate=100)
+
+	def create_customer(self):
+		name = "_Test CWIP Customer"
+		if not frappe.db.exists("Customer", name):
+			frappe.get_doc(
+				{
+					"doctype": "Customer",
+					"customer_name": name,
+					"customer_group": "_Test Customer Group",
+					"territory": "_Test Territory",
+					"default_price_list": PRICE_LIST,
+				}
+			).insert()
+		return name
+
+	def run_report(self, **extra):
+		filters = frappe._dict({"customer": self.customer})
+		filters.update(extra)
+		return execute(filters)[1]
+
+	def test_customer_filter_is_mandatory(self):
+		self.assertRaises(frappe.ValidationError, execute, frappe._dict({}))
+
+	def test_selling_rate_and_available_stock_for_item(self):
+		rows = self.run_report(item=self.item)
+
+		row = next((r for r in rows if r["item_code"] == self.item), None)
+		self.assertIsNotNone(row, "Sales item missing from report")
+		self.assertEqual(row["item_name"], frappe.db.get_value("Item", self.item, "item_name"))
+		self.assertEqual(row["selling_rate"], 250)  # from the customer's price list
+		self.assertEqual(row["available_stock"], 10)  # stocked into Stores - _TC
+		self.assertEqual(row["price_list"], PRICE_LIST)
+
+	def test_item_filter_scopes_to_single_item(self):
+		other = make_item(properties={"is_stock_item": 1, "is_sales_item": 1}).name
+
+		item_codes = {r["item_code"] for r in self.run_report(item=self.item)}
+		self.assertIn(self.item, item_codes)
+		self.assertNotIn(other, item_codes)