code: def test_graph_basics(self):
      (
          G,
          x,
          y,
          edge_x,
          edge_y,
          edge_index,
          graph_x,
          graph_y,
      ) = simple_networkx_graph()
      Graph.add_edge_attr(G, "edge_feature", edge_x)
      Graph.add_edge_attr(G, "edge_label", edge_y)
      Graph.add_node_attr(G, "node_feature", x)
      Graph.add_node_attr(G, "node_label", y)
      Graph.add_graph_attr(G, "graph_feature", graph_x)
      Graph.add_graph_attr(G, "graph_label", graph_y)
      dg = Graph(G)
      self.assertTrue(dg.is_directed())
      self.assertEqual(dg.is_undirected(), False)
      self.assertEqual(len(dg), 10)
      for item in [
          "G",
          "node_feature",
          "node_label",
          "edge_feature",
          "edge_label",
          "graph_feature",
          "graph_label",
          "edge_index",
          "edge_label_index",
          "node_label_index",
      ]:
          self.assertEqual(item in dg, True)
      self.assertEqual(len([key for key in dg]), 10)
  
file_path: deepsnap/tests/test_graph.py
imports: import torch
  import unittest
  import numpy
  from tests.utils import simple_networkx_graph
  from deepsnap.graph import Graph
  from torch_geometric.datasets import Planetoid
label_desc: Use image node_id 2 for calling the TestGraph obj's underlying member method code with example usage: obj.test_graph_basics() without return types