code: def setUp(self):
      self.arr1 = cupy.array([1, 2], dtype="float32")
      self.arr2 = cupy.array([3, 4], dtype="float32")
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy.cuda import runtime
  from cupy.cuda.texture import ChannelFormatDescriptor, CUDAarray, ResourceDescriptor, TextureDescriptor, TextureObject
label_desc: Use image node_id 1 for calling the TestElementwiseKernelSize obj's underlying member method code with example usage: obj.setUp() without return types