test: basic test case for item-wise purchase register

erpnext/accounts/report/item_wise_purchase_register/test_item_wise_purchase_register.py

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+import frappe
+from frappe.tests.utils import FrappeTestCase
+from frappe.utils import getdate, today
+
+from erpnext.accounts.doctype.purchase_invoice.test_purchase_invoice import make_purchase_invoice
+from erpnext.accounts.report.item_wise_purchase_register.item_wise_purchase_register import execute
+from erpnext.accounts.test.accounts_mixin import AccountsTestMixin
+
+
+class TestItemWisePurchaseRegister(AccountsTestMixin, FrappeTestCase):
+	def setUp(self):
+		self.create_company()
+		self.create_supplier()
+		self.create_item()
+
+	def tearDown(self):
+		frappe.db.rollback()
+
+	def create_purchase_invoice(self, do_not_submit=False):
+		pi = make_purchase_invoice(
+			item=self.item,
+			company=self.company,
+			supplier=self.supplier,
+			is_return=False,
+			update_stock=False,
+			do_not_save=1,
+			rate=100,
+			price_list_rate=100,
+			qty=1,
+		)
+
+		pi = pi.save()
+		if not do_not_submit:
+			pi = pi.submit()
+		return pi
+
+	def test_basic_report_output(self):
+		pi = self.create_purchase_invoice()
+
+		filters = frappe._dict({"from_date": today(), "to_date": today(), "company": self.company})
+		report = execute(filters)
+
+		self.assertEqual(len(report[1]), 1)
+
+		expected_result = {
+			"item_code": pi.items[0].item_code,
+			"invoice": pi.name,
+			"posting_date": getdate(),
+			"supplier": pi.supplier,
+			"credit_to": pi.credit_to,
+			"company": self.company,
+			"expense_account": pi.items[0].expense_account,
+			"stock_qty": 1.0,
+			"stock_uom": pi.items[0].stock_uom,
+			"rate": 100.0,
+			"amount": 100.0,
+			"total_tax": 0,
+			"total": 100.0,
+			"currency": "INR",
+		}
+
+		report_output = {k: v for k, v in report[1][0].items() if k in expected_result}
+		self.assertDictEqual(report_output, expected_result)