code: def test_S4(self):
      G = nx.star_graph(4)
      self.test(G, 1, 2, [0])
  
imports: import random
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 4 for calling the TestCommonNeighbors obj's underlying member method code with example usage: obj.test_S4() without return types