def METHOD_NAME(self, s):
    corrector, corrector2, kernel, maxerror = s
    sim = rebound.Simulation()
    rebound.data.add_outer_solar_system(sim)
    sim.integrator = "whfast"
    sim.ri_whfast.corrector = corrector 
    sim.ri_whfast.corrector2 = corrector2
    sim.ri_whfast.kernel = kernel
    sim.step()
    sim2 = sim.copy()
    sim.step()
    sim2.step()
    self.assertEqual(sim,sim2)