code: def test_calculate_cluster_measures_on_empty_array():
      test_size, test_mass = _utils.calculate_cluster_measures(
          np.zeros((10, 10, 10, 1)),
          threshold=0.001,
          bin_struct=generate_binary_structure(3, 1),
          two_sided_test=True,
      )
  
      true_size = 0
      true_mass = 0
      assert test_size[0] == true_size
      assert test_mass[0] == true_mass
  
imports: import math
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal
  from scipy.ndimage import generate_binary_structure
  from nilearn.mass_univariate import _utils
  from nilearn.mass_univariate.tests._testing import get_tvalue_with_alternative_library
label_desc: Use image node_id 11 for calling a global function with example usage: test_calculate_cluster_measures_on_empty_array() without return types