code: def testMultiplication(self):
      g = Graph.Full(3) * 3
      self.assertTrue(
          g.vcount() == 9
          and g.ecount() == 9
          and g.connected_components().membership
          == [0, 0, 0, 1, 1, 1, 2, 2, 2]
      )
  
imports: import unittest
  from igraph import Graph, disjoint_union, intersection, union
label_desc: Use image node_id 2 for calling the OperatorTests obj's underlying member method code with example usage: obj.testMultiplication() without return types