code: def test_actor_rotate_z(actor):
      actor.rotate_z(90)
      assert np.allclose(actor.orientation, (0, 0, 90))
  
imports: import platform
  import numpy
  import pytest
  import vtk
  import pyvista
  from pyvista import examples
label_desc: Use image node_id 16 for calling a global function with example usage: test_actor_rotate_z(actor) without return types