def METHOD_NAME() -> None:
    runner = CliRunner()
    with mock.patch.object(main, "run") as mock_run:
        result = runner.invoke(cli, ["tests.test_cli:App", "--header", HEADERS])
    assert result.output == ""
    assert result.exit_code == 0
    mock_run.assert_called_once()
    assert mock_run.call_args[1]["headers"] == [
        [
            "Content-Security-Policy",
            "default-src 'self'; script-src https://example.com",
        ]
    ]