code: def test_smoke(self, device, dtype):
      C, H, W = 3, 4, 5
      img = torch.rand(C, H, W, device=device, dtype=dtype)
      assert isinstance(kornia.color.luv_to_rgb(img), torch.Tensor)
  
imports: import pytest
  import torch
  from torch.autograd import gradcheck
  import kornia
  from kornia.testing import BaseTester
label_desc: Use image node_id 1 for calling the TestLuvToRgb obj's underlying member method code with example usage: obj.test_smoke(device, dtype) without return types