def test_particle_update_pos(): p = Particle(1., 2., 3., 2., 2.) p.update_pos(1.0) assert p.x == 4.0 assert p.y == 5.0 p.update_pos(2.0) assert p.x == 8.0 assert p.y == 9.0
def test_particle_update_pos__h_lt_0(): try: p = Particle(1., 2., 2., 2., 2.) p.update_pos(-1.0) except ValueError: pass