code: def test_default_is_matrix_kronsum():
      m = scipy.sparse.kronsum(
          np.array([[1, 0], [0, 1]]), np.array([[0, 1], [1, 0]])
      )
      assert not isinstance(m, scipy.sparse.sparray)
  
imports: import pytest
  import numpy
  import numpy.testing
  import scipy.sparse
  import scipy.sparse.linalg
  from scipy._lib._util import VisibleDeprecationWarning
label_desc: Use image node_id 41 for calling a global function with example usage: test_default_is_matrix_kronsum() without return types