code: def test_size(self):
      G = self.K3
      assert G.size() == 6
      assert G.number_of_edges() == 6
  
imports: import pytest
  import networkx
  from networkx.utils import nodes_equal
  from .test_graph import BaseAttrGraphTester, BaseGraphTester
  from .test_graph import TestEdgeSubgraph
  from .test_graph import TestGraph
label_desc: Use image node_id 14 for calling the BaseDiGraphTester obj's underlying member method code with example usage: obj.test_size() without return types