code: def test_edge_label(self, visitor):
      node = transformers.ParentChildNodeTransformer().visit(
          ast.parse("x = 1")
      )
  
      visitor.visit(node)
  
      dot_edge = visitor.graph.get_edge(str(node), str(node.body[0]))[0]
      assert dot_edge.get_label() == "body[0]"
  
file_path: astmonkey/astmonkey/tests/test_visitors.py
imports: import sys
  import pytest
  import ast
  from astmonkey import visitors, transformers, utils
label_desc: Use image node_id 5 for calling the TestGraphNodeVisitor obj's underlying member method code with example usage: obj.test_edge_label(visitor) without return types