code: def test_get_edges(self):
      edges_expected = [
          ["family-out", "dog-out"],
          ["bowel-problem", "dog-out"],
          ["family-out", "light-on"],
          ["dog-out", "hear-bark"],
      ]
      self.assertListEqual(
          sorted(self.reader.variable_edges), sorted(edges_expected)
      )
  
imports: import os
  import unittest
  import networkx
  import numpy
  import numpy.testing
  from pgmpy import config
  from pgmpy.factors.discrete import TabularCPD
  from pgmpy.models import BayesianNetwork
  from pgmpy.readwrite import BIFReader, BIFWriter
label_desc: Use image node_id 9 for calling the TestBIFReaderTorch obj's underlying member method code with example usage: obj.test_get_edges() without return types