code: def test_unknown_data(self):
      class Data:
          pass
  
      with pytest.raises(TypeError):
          with pytest.warns(UserWarning):
              d = Data()
              xgb.DMatrix(d)
  
      from scipy import sparse
  
      rng = np.random.RandomState(1994)
      X = rng.rand(10, 10)
      y = rng.rand(10)
      X = sparse.dok_matrix(X)
      Xy = xgb.DMatrix(X, y)
      assert Xy.num_row() == 10
      assert Xy.num_col() == 10
  
imports: import csv
  import os
  import tempfile
  import warnings
  import numpy
  import pytest
  import scipy.sparse
  from hypothesis import given, settings, strategies
  from scipy.sparse import csr_matrix, rand
  import xgboost
  from xgboost import testing
  from xgboost.core import DataSplitMode
  from xgboost.testing.data import np_dtypes, run_base_margin_info
label_desc: Use image node_id 13 for calling the TestDMatrix obj's underlying member method code with example usage: obj.test_unknown_data() without return types