code: def test_Q_discrete_white_noise():
      Q = Q_discrete_white_noise(2)
      assert Q[0, 0] == 0.25
      assert Q[1, 0] == 0.5
      assert Q[0, 1] == 0.5
      assert Q[1, 1] == 1
  
      assert Q.shape == (2, 2)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from filterpy.common import linear_ode_discretation, Q_discrete_white_noise, kinematic_kf
  from numpy import array
label_desc: Use image node_id 3 for calling a global function with example usage: test_Q_discrete_white_noise() without return types