EXPECT_TF_META("v", -1, TF_ATTR_TENSOR, -1);
  TF_Tensor* t_out = nullptr;
  TF_OperationGetAttrTensor(oper, "v", &t_out, s_);
  ASSERT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
  EXPECT_EQ(TF_STRING, TF_TensorType(t_out));
  EXPECT_EQ(0, TF_NumDims(t_out));
  ASSERT_EQ(TF_TensorByteSize(t_in.get()), TF_TensorByteSize(t_out));
  TF_TString* t_in_tstr = static_cast<TF_TString*>(TF_TensorData(t_in.get()));