code: def test_toarray(self):
      m = self.m.toarray()
      expect = [[0, 0, 0, 0], [3, 1, 0, 0], [0, 4, 2, 0]]
      assert m.flags.c_contiguous
      cupy.testing.assert_allclose(m, expect)
  
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 11 for calling the TestDiaMatrix obj's underlying member method code with example usage: obj.test_toarray() without return types