code: def test_run_sp():
      a1 = np.random.randn(100, 100)
      a2 = np.random.randn(100, 100)
  
      res = run_sp(_sp_matmul, a1, a2)
      assert np.all(res == a1 @ a2)
  
imports: import os
  import logging
  import multiprocessing
  import numpy
  import pytest
  from seedbank import root_seed
  from lenskit.util.parallel import invoker, proc_count, run_sp, is_worker, is_mp_worker
  from lenskit.util.test import set_env_var
  from lenskit.sharing import persist, SHM_AVAILABLE
  from pytest import mark, raises, approx
label_desc: Use image node_id 12 for calling a global function with example usage: test_run_sp() without return types