test: add value-level coverage for Budget Variance report

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

erpnext/accounts/report/budget_variance_report/test_budget_variance_report.py

@@ -2,26 +2,98 @@
 # For license information, please see license.txt
 
 import frappe
+from frappe.utils import nowdate
 
+from erpnext.accounts.doctype.budget.test_budget import make_budget
+from erpnext.accounts.doctype.journal_entry.test_journal_entry import make_journal_entry
 from erpnext.accounts.report.budget_variance_report.budget_variance_report import execute
+from erpnext.accounts.utils import get_fiscal_year
 from erpnext.tests.utils import ERPNextTestSuite
 
+ACCOUNT = "_Test Account Cost for Goods Sold - _TC"
+COST_CENTER = "_Test Cost Center - _TC"
+COST_CENTER_2 = "_Test Cost Center 2 - _TC"
+
 
 class TestBudgetVarianceReport(ERPNextTestSuite):
+	def setUp(self):
+		self.fy = get_fiscal_year(nowdate())[0]
+
+	def run_report(self, **extra):
+		filters = frappe._dict(
+			{
+				"company": "_Test Company",
+				"from_fiscal_year": self.fy,
+				"to_fiscal_year": self.fy,
+				"period": "Yearly",
+				"budget_against": "Cost Center",
+				**extra,
+			}
+		)
+		return execute(filters)[1]
+
+	def report_row(self, data, dimension, account=ACCOUNT):
+		return next(
+			row for row in data if row["budget_against"] == dimension and row["account"] == account
+		)
+
+	def field(self, label):
+		return frappe.scrub(f"{label} {self.fy}")
+
 	def test_report_executes(self):
 		# Smoke-guards the raw-SQL -> query-builder port: the report query must compile and run on
 		# both MariaDB and postgres.
-		company = frappe.db.get_value("Company", {}, "name")
-		fy = frappe.db.get_value("Fiscal Year", {}, "name", order_by="year_start_date desc")
 		columns, *_rest = execute(
 			frappe._dict(
 				{
-					"company": company,
-					"from_fiscal_year": fy,
-					"to_fiscal_year": fy,
+					"company": "_Test Company",
+					"from_fiscal_year": self.fy,
+					"to_fiscal_year": self.fy,
 					"period": "Yearly",
 					"budget_against": "Cost Center",
 				}
 			)
 		)
 		self.assertTrue(columns)
+
+	def test_budget_amount_shown_with_zero_actual(self):
+		make_budget(budget_against="Cost Center", cost_center=COST_CENTER, budget_amount=120000, submit_budget=1)
+
+		row = self.report_row(self.run_report(), COST_CENTER)
+		self.assertEqual(row[self.field("Budget")], 120000)
+		self.assertEqual(row[self.field("Actual")], 0)
+		self.assertEqual(row[self.field("Variance")], 120000)
+
+	def test_actual_expense_updates_actual_and_variance(self):
+		make_budget(budget_against="Cost Center", cost_center=COST_CENTER, budget_amount=120000, submit_budget=1)
+		# book an actual expense well within the annual budget so the "Stop" action does not block it
+		make_journal_entry(ACCOUNT, "_Test Bank - _TC", 50000, cost_center=COST_CENTER, submit=True)
+
+		row = self.report_row(self.run_report(), COST_CENTER)
+		self.assertEqual(row[self.field("Actual")], 50000)
+		self.assertEqual(row[self.field("Variance")], 70000)  # 120000 - 50000
+
+	def test_budget_against_filter_limits_dimensions(self):
+		make_budget(budget_against="Cost Center", cost_center=COST_CENTER, budget_amount=120000, submit_budget=1)
+		make_budget(
+			budget_against="Cost Center", cost_center=COST_CENTER_2, budget_amount=80000, submit_budget=1
+		)
+
+		data = self.run_report(budget_against_filter=[COST_CENTER])
+		dimensions = {row["budget_against"] for row in data}
+		self.assertEqual(dimensions, {COST_CENTER})
+
+	def test_monthly_period_totals(self):
+		make_budget(budget_against="Cost Center", cost_center=COST_CENTER, budget_amount=120000, submit_budget=1)
+		make_journal_entry(ACCOUNT, "_Test Bank - _TC", 50000, cost_center=COST_CENTER, submit=True)
+
+		row = self.report_row(self.run_report(period="Monthly"), COST_CENTER)
+		# totals roll up the per-month columns across the year
+		self.assertEqual(row["total_budget"], 120000)
+		self.assertEqual(row["total_actual"], 50000)
+		self.assertEqual(row["total_variance"], 70000)
+
+	def test_no_budget_returns_no_rows(self):
+		# a dimension without any budget produces no report rows
+		data = self.run_report(budget_against_filter=["_Test Write Off Cost Center - _TC"])
+		self.assertEqual(data, [])