refactor(test): make party specific item deterministic

erpnext/selling/doctype/party_specific_item/test_party_specific_item.py

@@ -17,36 +17,37 @@ def create_party_specific_item(**args):
 
 
 class TestPartySpecificItem(ERPNextTestSuite):
-	def setUp(self):
-		self.customer = frappe.get_last_doc("Customer")
-		self.supplier = frappe.get_last_doc("Supplier")
-		self.item = frappe.get_last_doc("Item")
-
 	def test_item_query_for_customer(self):
+		customer = self.customer[0].name
+		item = self.item[0].name
+
 		create_party_specific_item(
 			party_type="Customer",
-			party=self.customer.name,
+			party=customer,
 			restrict_based_on="Item",
-			based_on_value=self.item.name,
+			based_on_value=item,
 		)
-		filters = {"is_sales_item": 1, "customer": self.customer.name}
+		filters = {"is_sales_item": 1, "customer": customer}
 		items = item_query(
 			doctype="Item", txt="", searchfield="name", start=0, page_len=20, filters=filters, as_dict=False
 		)
-		self.assertTrue(self.item.name in flatten(items))
+		self.assertTrue(item in flatten(items))
 
 	def test_item_query_for_supplier(self):
+		supplier = self.suppliers[0].name
+		item = self.item_group[0].name
+
 		create_party_specific_item(
 			party_type="Supplier",
-			party=self.supplier.name,
+			party=supplier,
 			restrict_based_on="Item Group",
-			based_on_value=self.item.item_group,
+			based_on_value=item,
 		)
-		filters = {"supplier": self.supplier.name, "is_purchase_item": 1}
+		filters = {"supplier": supplier, "is_purchase_item": 1}
 		items = item_query(
 			doctype="Item", txt="", searchfield="name", start=0, page_len=20, filters=filters, as_dict=False
 		)
-		self.assertTrue(self.item.item_group in flatten(items))
+		self.assertTrue(item in flatten(items))
 
 
 def flatten(lst):