code: def test_nomatch(self, device):
      desc1 = torch.tensor([[0, 0.0]], device=device)
      desc2 = torch.tensor([[5, 5.0]], device=device)
  
      dists, idxs = match_smnn(desc1, desc2, 0.8)
      assert len(dists) == 0
      assert len(idxs) == 0
  
imports: import pytest
  import torch
  from torch.autograd import gradcheck
  import kornia.testing
  from kornia.feature.integrated import LightGlueMatcher
  from kornia.feature.laf import laf_from_center_scale_ori
  from kornia.feature.matching import DescriptorMatcher, GeometryAwareDescriptorMatcher, match_adalam, match_fginn, match_mnn, match_nn, match_smnn, match_snn
  from kornia.testing import assert_close
label_desc: Use image node_id 3 for calling the TestMatchSMNN obj's underlying member method code with example usage: obj.test_nomatch(device) without return types