code: def suite():
      clique_suite = unittest.defaultTestLoader.loadTestsFromTestCase(
          CliqueTests
      )
      indvset_suite = unittest.defaultTestLoader.loadTestsFromTestCase(
          IndependentVertexSetTests
      )
      return unittest.TestSuite([clique_suite, indvset_suite])
  
imports: import unittest
  from igraph import Graph
  from .utils import temporary_file
label_desc: Use image node_id 1 for calling a global function with example usage: suite() and returns: unittest