code: def test_csr_with_dtype(self):
      A, B = self.data()
  
      actual = _construct.vstack(
          [A.tocsr(), B.tocsr()], dtype=self.dtype
      )
      assert actual.dtype == self.dtype
      assert actual.indices.dtype == cupy.int32
      assert actual.indptr.dtype == cupy.int32
  
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 6 for calling the TestVstack obj's underlying member method code with example usage: obj.test_csr_with_dtype() without return types