code: def test_spdiags(self, xp, sp):
      data = xp.arange(12, dtype=self.dtype).reshape(3, 4)
      diags = xp.array([0, -1, 2], dtype="i")
      x = sp.spdiags(data, diags, 3, 4)
      return x
  
imports: import functools
  import re
  from unittest import mock
  import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy.cuda import runtime
  from cupyx.scipy import sparse
  from cupyx.scipy.sparse import _construct
label_desc: Use image node_id 1 for calling the TestSpdiags obj's underlying member method code with example usage: obj.test_spdiags(xp, sp) and returns: x