code: def test_tensor_life_1(self, new_portal):
      portal, tensor = new_portal(1)
      assert portal.tensor is tensor
  
      portal.blue()
  
file_path: fairscale/tests/nn/pipe/skip/test_portal.py
imports: import pytest
  import torch
  from fairscale.nn.pipe.dependency import fork, join
  from fairscale.nn.pipe.skip.portal import Portal
  from fairscale.nn.pipe.stream import default_stream
label_desc: Use image node_id 3 for calling the TestTensorLife obj's underlying member method code with example usage: obj.test_tensor_life_1(new_portal) without return types