auto oper = TF_FinishOperation(desc, s_);
  ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
  EXPECT_TF_META("v", -1, TF_ATTR_STRING, 5);
  std::unique_ptr<char[]> value(new char[5]);

  TF_OperationGetAttrString(oper, "v", value.get(), 5, s_);
  EXPECT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
  EXPECT_EQ("bunny", string(static_cast<const char*>(value.get()), 5));
}

TEST_F(CApiAttributesTest, StringList) {

// point to an array of length at least `max_length` (ideally set to
// TF_AttrMetadata.total_size from TF_OperationGetAttrMetadata(oper,
// attr_name)).
TF_CAPI_EXPORT extern void TF_OperationGetAttrString(TF_Operation* oper,
                                                     const char* attr_name,
                                                     void* value,

    case tensorflow::AttrValue::VALUE_NOT_SET:
      status->status =
          InvalidArgument("Attribute '", attr_name, "' has no value set");
      break;
  }
  return metadata;
}

void TF_OperationGetAttrString(TF_Operation* oper, const char* attr_name,
                               void* value, size_t max_length,
                               TF_Status* status) {
  const auto* attr = GetAttrValue(oper, attr_name, status);