refactor(test): make manufacturing test idempotent

(cherry picked from commit f3be246df3)

erpnext/manufacturing/report/test_reports.py

@@ -4,61 +4,67 @@ import frappe
 
 from erpnext.tests.utils import ReportFilters, ReportName, execute_script_report
 
-DEFAULT_FILTERS = {
-	"company": "_Test Company",
-	"from_date": "2010-01-01",
-	"to_date": "2030-01-01",
-	"warehouse": "_Test Warehouse - _TC",
-}
-
-
-REPORT_FILTER_TEST_CASES: list[tuple[ReportName, ReportFilters]] = [
-	("BOM Explorer", {"bom": frappe.get_last_doc("BOM").name}),
-	("BOM Operations Time", {}),
-	("BOM Stock Calculated", {"bom": frappe.get_last_doc("BOM").name, "qty_to_make": 2}),
-	("BOM Stock Report", {"bom": frappe.get_last_doc("BOM").name, "qty_to_produce": 2}),
-	("Cost of Poor Quality Report", {"item": "_Test Item", "serial_no": "00"}),
-	("Downtime Analysis", {}),
-	(
-		"Exponential Smoothing Forecasting",
-		{
-			"based_on_document": "Sales Order",
-			"based_on_field": "Qty",
-			"no_of_years": 3,
-			"periodicity": "Yearly",
-			"smoothing_constant": 0.3,
-		},
-	),
-	("Job Card Summary", {"fiscal_year": "2021-2022"}),
-	("Production Analytics", {"range": "Monthly"}),
-	("Quality Inspection Summary", {}),
-	("Process Loss Report", {}),
-	("Work Order Stock Report", {}),
-	("Work Order Summary", {"fiscal_year": "2021-2022", "age": 0}),
-]
-
-
-if frappe.db.a_row_exists("Production Plan"):
-	REPORT_FILTER_TEST_CASES.append(
-		("Production Plan Summary", {"production_plan": frappe.get_last_doc("Production Plan").name})
-	)
-
-OPTIONAL_FILTERS = {
-	"warehouse": "_Test Warehouse - _TC",
-	"item": "_Test Item",
-	"item_group": "_Test Item Group",
-}
-
 
 class TestManufacturingReports(unittest.TestCase):
+	def setUp(self):
+		self.setup_default_filters()
+
+	def tearDown(self):
+		frappe.db.rollback()
+
+	def setup_default_filters(self):
+		self.last_bom = frappe.get_last_doc("BOM").name
+		self.DEFAULT_FILTERS = {
+			"company": "_Test Company",
+			"from_date": "2010-01-01",
+			"to_date": "2030-01-01",
+			"warehouse": "_Test Warehouse - _TC",
+		}
+
+		self.REPORT_FILTER_TEST_CASES: list[tuple[ReportName, ReportFilters]] = [
+			("BOM Explorer", {"bom": self.last_bom}),
+			("BOM Operations Time", {}),
+			("BOM Stock Calculated", {"bom": self.last_bom, "qty_to_make": 2}),
+			("BOM Stock Report", {"bom": self.last_bom, "qty_to_produce": 2}),
+			("Cost of Poor Quality Report", {"item": "_Test Item", "serial_no": "00"}),
+			("Downtime Analysis", {}),
+			(
+				"Exponential Smoothing Forecasting",
+				{
+					"based_on_document": "Sales Order",
+					"based_on_field": "Qty",
+					"no_of_years": 3,
+					"periodicity": "Yearly",
+					"smoothing_constant": 0.3,
+				},
+			),
+			("Job Card Summary", {"fiscal_year": "2021-2022"}),
+			("Production Analytics", {"range": "Monthly"}),
+			("Quality Inspection Summary", {}),
+			("Process Loss Report", {}),
+			("Work Order Stock Report", {}),
+			("Work Order Summary", {"fiscal_year": "2021-2022", "age": 0}),
+		]
+
+		if frappe.db.a_row_exists("Production Plan"):
+			self.REPORT_FILTER_TEST_CASES.append(
+				("Production Plan Summary", {"production_plan": frappe.get_last_doc("Production Plan").name})
+			)
+
+		self.OPTIONAL_FILTERS = {
+			"warehouse": "_Test Warehouse - _TC",
+			"item": "_Test Item",
+			"item_group": "_Test Item Group",
+		}
+
 	def test_execute_all_manufacturing_reports(self):
 		"""Test that all script report in manufacturing modules are executable with supported filters"""
-		for report, filter in REPORT_FILTER_TEST_CASES:
+		for report, filter in self.REPORT_FILTER_TEST_CASES:
 			with self.subTest(report=report):
 				execute_script_report(
 					report_name=report,
 					module="Manufacturing",
 					filters=filter,
-					default_filters=DEFAULT_FILTERS,
+					default_filters=self.DEFAULT_FILTERS,
-					optional_filters=OPTIONAL_FILTERS if filter.get("_optional") else None,
+					optional_filters=self.OPTIONAL_FILTERS if filter.get("_optional") else None,
 				)