code: def test_empty(self) -> None:
      self.assertEqual(
          EdgeList.empty(),
          EdgeList(
              EntityList.empty(),
              EntityList.empty(),
              torch.empty((0,), dtype=torch.long),
          ),
      )
  
imports: from unittest import main, TestCase
  import torch
  from torchbiggraph.edgelist import EdgeList
  from torchbiggraph.entitylist import EntityList
label_desc: Use image node_id 1 for calling the TestEdgeList obj's underlying member method code with example usage: obj.test_empty() without return types