code: def test_mars_sparse():
      val = SparseMatrix(sps.random(100, 100, 0.1, format="csr"))
      deserial = deserialize(*serialize(val))
      assert (val.spmatrix != deserial.spmatrix).nnz == 0
  
imports: import threading
  from collections import defaultdict, OrderedDict
  from typing import Any, Dict, List, Tuple
  import numpy
  import pandas
  import pytest
  from ...lib.sparse import SparseMatrix
  from ...tests.core import require_cupy, require_cudf
  from ...utils import lazy_import
  from ..None import serialize, serialize_with_spawn, deserialize
  from ..core import Placeholder, ListSerializer
label_desc: Use image node_id 13 for calling a global function with example usage: test_mars_sparse() without return types