EXPECT_TRUE(executed);
  ASSERT_TRUE(TF_GetCode(status.get()) == TF_OK) << TF_Message(status.get());
  TFE_DeleteTensorHandle(retval);

  // Explicit placement still forces the op onto the requested device
  matmul.reset(MatMulOp(context.get(), hcustom0.get(), hcpu.get()));
  TFE_OpSetDevice(matmul.get(), "/job:localhost/replica:0/task:0/device:CPU:0",
                  status.get());

  TF_DeleteTensor(value);
}

TEST_F(CApiAttributesTest, StringTensor) {
  // Create the string-Tensor "attribute" value.
  const char test_string[] =
      "borkborkborkborkborkborkborkbork";  // >24bytes to force heap alloc
  TF_TString tstr[1];
  TF_TString_Init(&tstr[0]);
  TF_TString_Copy(&tstr[0], test_string, sizeof(test_string) - 1);

  auto deallocator = [](void* data, size_t len, void* arg) {};