code: def test_subclass_unary_op(self):
      a = cupy.array([0, 1, 2]).view(C)
      a.info = 1
      outa = cupy.sin(a)
      assert isinstance(outa, C)
      assert outa.info is not None and outa.info == 1
  
      b = a.get()
      outb = numpy.sin(b)
      testing.assert_allclose(outa, outb)
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 8 for calling the TestArrayUfunc obj's underlying member method code with example usage: obj.test_subclass_unary_op() without return types