code: def test_docstring(self):
      cupy_func = self.cupy_func
      numpy_func = self.numpy_func
      assert hasattr(cupy_func, "__doc__")
      assert cupy_func.__doc__ is not None
      assert cupy_func.__doc__ != ""
      assert cupy_func.__doc__ is not numpy_func.__doc__
  
imports: import contextlib
  import inspect
  from typing import Callable
  import unittest
  from unittest import mock
  import warnings
  import numpy
  import cupy
  from cupy._core import internal
  import cupyx
  import cupyx.scipy.sparse
  from cupy.testing._pytest_impl import is_available
label_desc: Use image node_id 2 for calling the NumpyAliasBasicTestBase obj's underlying member method code with example usage: obj.test_docstring() without return types