def test_quads(self): """Test ParticleQuad objects""" m = IMP.Model("quads") p1 = IMP.Particle(m) p2 = IMP.Particle(m) p3 = IMP.Particle(m) p4 = IMP.Particle(m) p = IMP.ParticleQuad(p1, p2, p3, p4) #self.assertEqual(p.get_dimension(), 4) self.assertEqual(p[0], p1) self.assertEqual(p[1], p2) self.assertEqual(p[2], p3) self.assertEqual(p[3], p4)