def METHOD_NAME(self):
    np.random.seed(seed=42)
    num_part = 200
    positions = np.random.random((num_part, 3))
    dipoles = tests_common.random_dipoles(num_part)
    self.system.part.add(pos=positions * self.system.box_l,
                         dip=dipoles, rotation=num_part * [3 * [True]])
    self.minimize()