code: def test_concatenate_not_none():
      from brainiak.utils.utils import concatenate_not_none
      import numpy as np
  
      arrays = [None] * 5
  
      arrays[1] = np.array([0, 1, 2])
      arrays[3] = np.array([3, 4])
  
      r = concatenate_not_none(arrays, axis=0)
  
      assert np.all(
          np.arange(5) == r
      ), "Invalid concatenation of a list of arrays"
  
file_path: brainiak/tests/utils/test_utils.py
imports: import pytest
label_desc: Use image node_id 3 for calling a global function with example usage: test_concatenate_not_none() without return types