Class IndexableNoLen

tests/test_cmd2.py:1812–1816

    # Test that an object with __getitem__ but no __len__ works.
    # This covers the except (IndexError, TypeError) block in select()
    class IndexableNoLen:
        def __getitem__(self, item: int) -> str:
            if item == 0:
                return "value"
            raise IndexError

    # Mock read_input to return '1'
    read_input_mock = mock.MagicMock(name="read_input", return_value="1")