code: def test_default_is_matrix_kron_dense():
      m = scipy.sparse.kron(
          np.array([[1, 2], [3, 4]]), np.array([[4, 3], [2, 1]])
      )
      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 39 for calling a global function with example usage: test_default_is_matrix_kron_dense() without return types