code: def test_cache_hidden(self):
      shape = (2,)
      a = self.array(shape, intent.cache.hide, None)
      assert a.arr.shape == shape
  
      shape = (2, 3)
      a = self.array(shape, intent.cache.hide, None)
      assert a.arr.shape == shape
  
      shape = (-1, 3)
      try:
          a = self.array(shape, intent.cache.hide, None)
      except ValueError as msg:
          if not str(msg).startswith(
              "failed to create intent(cache|hide)|optional array"
          ):
              raise
      else:
          raise SystemError(
              "intent(cache) should have failed on undefined dimensions"
          )
  
imports: import os
  import sys
  import copy
  import platform
  import pytest
  from pathlib import Path
  import numpy
  from numpy.testing import assert_, assert_equal
  from numpy._core._type_aliases import c_names_dict
  from .None import util
label_desc: Use image node_id 19 for calling the TestSharedMemory obj's underlying member method code with example usage: obj.test_cache_hidden() without return types