code: def test_subsample(self):
      image = self.create()
      image2 = image.subsample(2, 3)
      self.assertEqual(image2.width(), 8)
      self.assertEqual(image2.height(), 6)
      self.assertEqual(image2.get(2, 2), image.get(4, 6))
  
      image2 = image.subsample(2)
      self.assertEqual(image2.width(), 8)
      self.assertEqual(image2.height(), 8)
      self.assertEqual(image2.get(2, 3), image.get(4, 6))
  
imports: import unittest
  import tkinter
  from test import support
  from test.support import os_helper
  from test.test_tkinter.support import AbstractTkTest, AbstractDefaultRootTest, requires_tk
label_desc: Use image node_id 23 for calling the PhotoImageTest obj's underlying member method code with example usage: obj.test_subsample() without return types