code: def test_ia_enron_employees_load() -> None:
      graph, edges = IAEnronEmployees().load()
  
      n_nodes = 151
      n_edges = 50572
  
      assert graph.number_of_nodes() == n_nodes
      assert graph.number_of_edges() == n_edges
      assert len(edges) == n_edges
      assert set(edges.columns) == {"source", "target", "time"}
  
imports: import pytest
  import tempfile
  import os
  import sys
  import numpy
  from stellargraph.datasets import *
  from urllib.error import URLError
  from stellargraph.datasets.dataset_loader import DatasetLoader
  from urllib.request import urlretrieve
  from unittest.mock import patch
label_desc: Use image node_id 22 for calling a global function with example usage: test_ia_enron_employees_load() without return types