code: def test_dense_repr(self, vals, fill_value):
      vals = np.array(vals)
      arr = SparseArray(vals, fill_value=fill_value)
  
      res = arr.to_dense()
      tm.assert_numpy_array_equal(res, vals)
  
imports: import re
  import numpy
  import pytest
  from pandas._libs.sparse import IntIndex
  import pandas
  from pandas import SparseDtype, isna
  import pandas._testing
  from pandas.core.arrays.sparse import SparseArray
label_desc: Use image node_id 7 for calling the TestSparseArray obj's underlying member method code with example usage: obj.test_dense_repr(vals, fill_value) without return types