def test_parse_delimited_list_empty(self):
"""
Tests that parse_delimited_list handles empty/null list values.
"""
self.assertEqual(len(parse_delimited_list(None)), 0)
self.assertEqual(len(parse_delimited_list('')), 0)
self.assertEqual(len(parse_delimited_list(' ')), 0)
def test_parse_delimited_list_one(self):
"""
Tests that parse_delimited_list handles a single item in a delimited string.
"""
# Add whitespace and extra semicolons to mess with the parser
parsed_list = parse_delimited_list('; Item A ;')
self.assertEqual(len(parsed_list), 1)
self.assertIn('Item A', parsed_list)
def test_parse_delimited_list_many(self):
"""
Tests that parse_delimited_list handles multiple list values (with some duplicates).
"""
parsed_list = parse_delimited_list('Item A ;Item B; Item C; Item A; Item B;;')
self.assertEqual(len(parsed_list), 3)
self.assertIn('Item A', parsed_list)
self.assertIn('Item B', parsed_list)
self.assertIn('Item C', parsed_list)
