code: def suite():
      homepage_example_suite = (
          unittest.defaultTestLoader.loadTestsFromTestCase(
              HomepageExampleTests
          )
      )
      return unittest.TestSuite([homepage_example_suite])
  
file_path: python-igraph/tests/test_homepage.py
imports: import unittest
  from igraph import Graph, Layout
label_desc: Use image node_id 1 for calling a global function with example usage: suite() and returns: unittest