code: def test_16bit_s(self):
      with Image.open("Tests/images/16bit.s.tif") as im:
          im.load()
          assert im.mode == "I"
          assert im.getpixel((0, 0)) == 32767
          assert im.getpixel((0, 1)) == 0
  
imports: import os
  from io import BytesIO
  import pytest
  from PIL import Image, ImageFile, TiffImagePlugin
  from PIL.TiffImagePlugin import RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION
  from .helper import assert_image_equal, assert_image_equal_tofile, assert_image_similar, assert_image_similar_tofile, hopper, is_pypy, is_win32
label_desc: Use image node_id 20 for calling the TestFileTiff obj's underlying member method code with example usage: obj.test_16bit_s() without return types