code: def test_diagonal_error(self):
      # Before scipy 1.5.0 dia_matrix diagonal raised
      # `ValueError`, now returns empty array.
      # Check #3469
      for xp, sp in ((numpy, scipy.sparse), (cupy, sparse)):
          m = _make(xp, sp, self.dtype)
          d = m.diagonal(k=10)
          assert d.size == 0
  
imports: import pickle
  import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy.cuda import driver
  from cupy.cuda import runtime
  from cupyx.scipy import sparse
label_desc: Use image node_id 17 for calling the TestDiaMatrixScipyComparison obj's underlying member method code with example usage: obj.test_diagonal_error() without return types