def test2(self): centre, orbiters = new_solar_system_for_mercury() mercury = MercuryWayWard() mercury.initialize_code() mercury.central_particle.add_particles(centre) mercury.orbiters.add_particles(orbiters) mercury.commit_particles() start_pos = mercury.orbiters[2].position mercury.evolve_model(16.|units.day) self.assertEqual(mercury.get_time(),16.|units.day) mercury.stop()