def test_particle_dist__bad_particle2():
try:
p = Particle(1., 2., 2., 2., 2.)
p2 = "wrong"
p.dist(p2)
except TypeError:
pass
def test_particle_dist():
p = Particle(1., 2., 2., 2., 2.)
p2 = Particle(1., 5., 6., 2., 2.)
p3 = Particle(1., 2., 6., 2., 2.)
assert p.dist(p2) == 5.0
assert p2.dist(p) == 5.0
assert p.dist(p3) == 4.0
assert p3.dist(p) == 4.0
assert p2.dist(p3) == 3.0
assert p3.dist(p2) == 3.0
