code: def test_track_provenance(x):
      new_provenance = frozenset("x")
      old_provenance = get_provenance(x)
      provenance = old_provenance | new_provenance
      assert provenance == get_provenance(
          track_provenance(x, new_provenance)
      )
  
imports: import pytest
  import torch
  from pyro.ops.provenance import ProvenanceTensor, get_provenance, track_provenance
  from tests.common import assert_equal, requires_cuda
label_desc: Use image node_id 2 for calling a global function with example usage: test_track_provenance(x) without return types