from unittest import mock
import pytest
from magicli import magicli


def test_help_message(capsys):
    inputs = [
        'appname --help',
        'appname command --help',
        'appname command --name=Name --amount=3 --help',
    ]
    help_message='Usage:\n    appname command_with_arguments --positional --optional\n'
    for i in inputs:
        args = i.split()
        with mock.patch('sys.argv', args):
            with pytest.raises(SystemExit):
                magicli(exclude=['test_help_message'])
        out, err = capsys.readouterr()
        assert out.startswith(help_message)


def command_with_arguments(positional, optional=True):
    pass