code: def test_pipe_buffer(self):
      p = (
          model_util.BufferedPipe()
          .add(lambda x: x + 1, num_workers=32)
          .add(lambda x: x * x)
      )
  
      out_gen = p((x for x in range(1, 5)))
  
      expected_l = [4, 9, 16, 25]
  
      self.assertEqual(list(out_gen), expected_l)
  
imports: import unittest
  import numpy
  import six
  from PIL import Image
  from io import BytesIO
  from timeout_decorator import timeout
  from studio import model_util
label_desc: Use image node_id 2 for calling the BufferedPipeTest obj's underlying member method code with example usage: obj.test_pipe_buffer() without return types