testDoNotDetachWhenTheLanderIsTooHighUp() {
  altimeter = mock(Altimeter)
  altimeter.stubs().altitude().to_return(5.m)
  
  DetachmentSystem.new(parachute = mock(Parachute))
  parachute.expects(no_invocations_of).detach()
  
  detachment_system.handle_acceleration_report(-50.ms2)
  
  // ???
}