code: def test_make_stream():
      with setup_test_file() as (fs, gs, cs):
          # test stream initialization
          assert_(isinstance(make_stream(gs), GenericStream))
  
imports: import os
  import zlib
  from io import BytesIO
  from tempfile import mkstemp
  from contextlib import contextmanager
  import numpy
  from numpy.testing import assert_, assert_equal
  from pytest import raises
  from scipy.io.matlab._streams import make_stream, GenericStream, ZlibInputStream, _read_into, _read_string, BLOCK_SIZE
label_desc: Use image node_id 2 for calling a global function with example usage: test_make_stream() without return types