message: Handle string comparision represented as np.objects
  and all other objects.
diff: @@ -168,6 +168,9 @@ class Runner(object):
  np.testing.assert_equal(len(ref_outputs), len(outputs))
  for i in range(len(outputs)):
  np.testing.assert_equal(ref_outputs[i].dtype, outputs[i].dtype)
  + if ref_outputs[i].dtype == np.object:
  + np.testing.assert_array_equal(ref_outputs[i], outputs[i])
  + else:
  np.testing.assert_allclose(
  ref_outputs[i],
  outputs[i],
  