code: def test_optimize_cache(self):
      if (
          _accelerator.ACCELERATOR_CUB
          in _accelerator.get_reduction_accelerators()
      ):
          pytest.skip("optimize cannot be mocked for CUB reduction")
  
      target = cupyx.optimizing._optimize._optimize
      target_full_name = "{}.{}".format(
          target.__module__, target.__name__
      )
  
      with mock.patch(target_full_name) as optimize_impl:
          my_sum = cupy.ReductionKernel(
              "T x", "T out", "x", "a + b", "out = a", "0", "my_sum"
          )
          my_sum_ = cupy.ReductionKernel(
              "T x", "T out", "x", "a + b", "out = a", "0", "my_sum_"
          )
          x = testing.shaped_arange((3, 4), cupy)
          x_ = testing.shaped_arange((3, 4), cupy)
          y = testing.shaped_arange((4, 4), cupy)
          z = testing.shaped_arange((3, 4), cupy)[::-1]
          assert x.strides == y.strides
          assert x.shape == z.shape
  
          with cupyx.optimizing.optimize():
              my_sum(x, axis=1)
              assert optimize_impl.call_count == 1
              my_sum(x, axis=1)
              assert optimize_impl.call_count == 1
              my_sum(x, axis=0)
              assert optimize_impl.call_count == 2
              my_sum(x_, axis=1)
              assert optimize_impl.call_count == 2
              my_sum(y, axis=1)
              assert optimize_impl.call_count == 3
              my_sum(z, axis=1)
              assert optimize_impl.call_count == 4
              my_sum_(x, axis=1)
              assert optimize_impl.call_count == 5
  
          with cupyx.optimizing.optimize(key="new_key"):
              my_sum(x, axis=1)
              assert optimize_impl.call_count == 6
  
          with cupyx.optimizing.optimize(key=None):
              my_sum(x, axis=1)
              assert optimize_impl.call_count == 6
              my_sum(x)
              assert optimize_impl.call_count == 7
  
imports: import os
  import tempfile
  import unittest
  from unittest import mock
  import pytest
  import cupy
  from cupy import testing
  from cupy._core import _accelerator
label_desc: Use image node_id 3 for calling the TestOptimize obj's underlying member method code with example usage: obj.test_optimize_cache() without return types