refactor: Use IntegrationTestCase in multiple files

Signed-off-by: David <dgx.arnold@gmail.com>

erpnext/tests/test_init.py

@@ -1,13 +1,14 @@
 import unittest
 
 import frappe
+from frappe.tests import IntegrationTestCase
 
 from erpnext import encode_company_abbr
 
 test_records = frappe.get_test_records("Company")
 
 
-class TestInit(unittest.TestCase):
+class TestInit(IntegrationTestCase):
 	def test_encode_company_abbr(self):
 		abbr = "NFECT"
 

erpnext/tests/test_notifications.py

@@ -1,14 +1,13 @@
 # Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
 # MIT License. See license.txt
-
-
 import unittest
 
 import frappe
 from frappe.desk import notifications
+from frappe.tests import IntegrationTestCase
 
 
-class TestNotifications(unittest.TestCase):
+class TestNotifications(IntegrationTestCase):
 	def test_get_notifications_for_targets(self):
 		"""
 		Test notification config entries for targets as percentages

erpnext/tests/test_point_of_sale.py

@@ -1,9 +1,9 @@
 # Copyright (c) 2022, Frappe Technologies Pvt. Ltd. and Contributors
 # MIT License. See license.txt
-
 import unittest
 
 import frappe
+from frappe.tests import IntegrationTestCase
 
 from erpnext.accounts.doctype.pos_profile.test_pos_profile import make_pos_profile
 from erpnext.selling.page.point_of_sale.point_of_sale import get_items
@@ -11,7 +11,7 @@ from erpnext.stock.doctype.item.test_item import make_item
 from erpnext.stock.doctype.stock_entry.stock_entry_utils import make_stock_entry
 
 
-class TestPointOfSale(unittest.TestCase):
+class TestPointOfSale(IntegrationTestCase):
 	@classmethod
 	def setUpClass(cls) -> None:
 		frappe.db.savepoint("before_test_point_of_sale")

erpnext/tests/test_regional.py

@@ -1,6 +1,7 @@
 import unittest
 
 import frappe
+from frappe.tests import IntegrationTestCase
 
 import erpnext
 
@@ -10,7 +11,7 @@ def test_method():
 	return "original"
 
 
-class TestInit(unittest.TestCase):
+class TestInit(IntegrationTestCase):
 	def test_regional_overrides(self):
 		frappe.flags.country = "Maldives"
 		self.assertEqual(test_method(), "original")

erpnext/tests/test_webform.py

@@ -1,12 +1,13 @@
 import unittest
 
 import frappe
+from frappe.tests import IntegrationTestCase
 
 from erpnext.buying.doctype.purchase_order.test_purchase_order import create_purchase_order
 from erpnext.buying.doctype.supplier.test_supplier import create_supplier
 
 
-class TestWebsite(unittest.TestCase):
+class TestWebsite(IntegrationTestCase):
 	def test_permission_for_custom_doctype(self):
 		create_user("Supplier 1", "supplier1@gmail.com")
 		create_user("Supplier 2", "supplier2@gmail.com")