def METHOD_NAME(self, hasSteerPosDeg, hasSteeringAngle, hasCastered):
    self.tree.write(self.sandbox('aircraft', self.aircraft_name,
                                 self.aircraft_name+'.xml'))
    fdm = self.create_fdm()
    fdm.set_aircraft_path('aircraft')
    fdm.load_script(self.script_path)
    fdm.run_ic()
    pm = fdm.get_property_manager()
    self.assertTrue(pm.hasNode('fcs/steer-pos-deg') == hasSteerPosDeg)
    self.assertTrue(pm.hasNode('gear/unit/steering-angle-deg')
                    == hasSteeringAngle)
    self.assertTrue(pm.hasNode('gear/unit/castered') == hasCastered)
    return fdm