Function test_subcommand_attachment_errors

tests/test_cmd2.py:4570–4602

()

def test_subcommand_attachment_errors() -> None:
    class SubcmdErrorApp(cmd2.Cmd):
        def __init__(self) -> None:
            super().__init__()

        test_parser = cmd2.Cmd2ArgumentParser()
        test_parser.add_subparsers(required=True)

        @cmd2.with_argparser(test_parser)
        def do_test(self, _statement: cmd2.Statement) -> None:
            pass

        def do_no_argparse(self, _statement: cmd2.Statement) -> None:
            pass

    app = SubcmdErrorApp()

    # Test empty command
    with pytest.raises(ValueError, match="Command path cannot be empty"):
        app.attach_subcommand("", "sub", cmd2.Cmd2ArgumentParser())

    # Test non-existent command
    with pytest.raises(ValueError, match="Root command 'fake' does not exist"):
        app.attach_subcommand("fake", "sub", cmd2.Cmd2ArgumentParser())

    # Test command that doesn't use argparse
    with pytest.raises(ValueError, match="Command 'no_argparse' does not use argparse"):
        app.attach_subcommand("no_argparse", "sub", cmd2.Cmd2ArgumentParser())

    # Test duplicate subcommand
    app.attach_subcommand("test", "sub", cmd2.Cmd2ArgumentParser())
    with pytest.raises(ValueError, match="Subcommand 'sub' already exists for 'test'"):
        app.attach_subcommand("test", "sub", cmd2.Cmd2ArgumentParser())