code: def test_get_mask(self):
      self.assertEqual([0, 0, 0, 0, 0, 0, 0], sample.get_mask("x"))
      new_sample = UTCnSample({"x": ""})
      self.assertEqual([], new_sample.get_mask("x"))
  
imports: import unittest
  from textflint.input.component.sample.utcn_sample import *
label_desc: Use image node_id 4 for calling the TestUTCnSample obj's underlying member method code with example usage: obj.test_get_mask() without return types