code: def test_get_pos(self):
      self.assertEqual(
          [
              ["nt", 0, 1],
              ["n", 2, 3],
              ["d", 4, 4],
              ["a", 5, 5],
              ["wp", 6, 6],
          ],
          sample.get_pos("x"),
      )
      new_sample = UTCnSample({"x": ""})
      self.assertEqual([], new_sample.get_pos("x"))
  
imports: import unittest
  from textflint.input.component.sample.utcn_sample import *
label_desc: Use image node_id 7 for calling the TestUTCnSample obj's underlying member method code with example usage: obj.test_get_pos() without return types