How to use the gdbgui.backend.app.config function in gdbgui

def test_arguments_passed_to_gdb(monkeypatch, test_argv, expected_gdb_args):
    def mock_setup_backend(*args, **kwargs):
        pass

    monkeypatch.setattr(gdbgui.backend, "setup_backend", mock_setup_backend)
    monkeypatch.setattr(sys, "argv", test_argv)
    gdbgui.backend.main()

    state = StateManager(gdbgui.backend.app.config)
    assert len(state.get_gdb_args()) == len(expected_gdb_args)