code: def test_conversion(self, dtype):
      orig_array = _gen_array(dtype)
      tensor = orig_array.toDlpack()
      out_array = cupy.fromDlpack(tensor)
      testing.assert_array_equal(orig_array, out_array)
      testing.assert_array_equal(
          orig_array.data.ptr, out_array.data.ptr
      )
  
imports: import unittest
  import pytest
  import cupy
  from cupy import cuda
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestDLPackConversion obj's underlying member method code with example usage: obj.test_conversion(dtype) without return types