code: def test_binary_op(self, dtype):
      a1 = cupy.array(numpy.array([0, 1, 2]), dtype=dtype)
      a2 = cupy.array(numpy.array([0, 1, 2]), dtype=dtype)
      outa = numpy.add(a1, a2)
      # numpy operation produced a cupy array
      assert isinstance(outa, cupy.ndarray)
      b1 = a1.get()
      b2 = a2.get()
      outb = numpy.add(b1, b2)
      assert numpy.allclose(outa.get(), outb)
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 3 for calling the TestArrayUfunc obj's underlying member method code with example usage: obj.test_binary_op(dtype) without return types