# test_main.py
import pytest
from click.testing import CliRunner
from iottb.main import cli  # Adjust this import according to your project's structure


@pytest.fixture
def runner():
    """Fixture to return a Click CliRunner instance."""
    return CliRunner()


def test_debug_option(runner):
    """Test if the debug mode sets the appropriate flag in the context."""
    result = runner.invoke(cli, ['--debug'])
    assert result.exit_code == 0
    # If debug mode affects logging or other behavior, validate those:
    assert 'DEBUG mode on' in result.output