code: def check_array_scalar_op(self, op, xp, dtyes, trans=False):
      a = xp.array([[1, 2, 3], [4, 5, 6]], dtyes)
      if trans:
          a = a.T
  
      if xp is cupy:
          with self.stream:
              a = DummyObjectWithCudaArrayInterface(a, self.ver)
              f = cupy.ElementwiseKernel("T x, T y", "T z", "z = x + y")
              return f(a, dtyes(3))
      else:
          return a + dtyes(3)
  
imports: import unittest
  import pytest
  from cupy_backends.cuda import stream
  import cupy
  from cupy import _core
  from cupy import testing
label_desc: Use image node_id 2 for calling the TestElementwiseKernel obj's underlying member method code with example usage: obj.check_array_scalar_op(op, xp, dtyes, trans) and returns: unknown, f