test: automated test for running all stock reports (#27510)

* test: automated test for running all stock reports

These test do not assert correctness, they just check that "execute" function
is working with sane filters.

* test: make report execution test modular

erpnext/tests/utils.py

@@ -3,8 +3,13 @@
 
 import copy
 from contextlib import contextmanager
+from typing import Any, Dict, NewType, Optional
 
 import frappe
+from frappe.core.doctype.report.report import get_report_module_dotted_path
+
+ReportFilters = Dict[str, Any]
+ReportName = NewType("ReportName", str)
 
 
 def create_test_contact_and_address():
@@ -78,3 +83,39 @@ def change_settings(doctype, settings_dict):
 		for key, value in previous_settings.items():
 			setattr(settings, key, value)
 		settings.save()
+
+
+def execute_script_report(
+		report_name: ReportName,
+		module: str,
+		filters: ReportFilters,
+		default_filters: Optional[ReportFilters] = None,
+		optional_filters: Optional[ReportFilters] = None
+	):
+	"""Util for testing execution of a report with specified filters.
+
+	Tests the execution of report with default_filters + filters.
+	Tests the execution using optional_filters one at a time.
+
+	Args:
+		report_name: Human readable name of report (unscrubbed)
+		module: module to which report belongs to
+		filters: specific values for filters
+		default_filters: default values for filters such as company name.
+		optional_filters: filters which should be tested one at a time in addition to default filters.
+	"""
+
+	if default_filters is None:
+		default_filters = {}
+
+	report_execute_fn = frappe.get_attr(get_report_module_dotted_path(module, report_name) + ".execute")
+	report_filters = frappe._dict(default_filters).copy().update(filters)
+
+	report_data = report_execute_fn(report_filters)
+
+	if optional_filters:
+		for key, value in optional_filters.items():
+			filter_with_optional_param = report_filters.copy().update({key: value})
+			report_execute_fn(filter_with_optional_param)
+
+	return report_data