code: def test_default_is_matrix_random():
      m = scipy.sparse.random(3, 3)
      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 42 for calling a global function with example usage: test_default_is_matrix_random() without return types