code: def test_sinewave(self):
      for filepath in list_of_sounds:
          if "44100Hz_44100f_sine441.wav" in filepath:
              results = self.analyze_file(filepath)
              assert_equal(len(results), 1)
              assert_equal(len(results[0]), 2)
              assert_equal(results[0][0], 1280)
              assert_equal(results[0][1], [69, 123, -1])
  
imports: from numpy.testing import TestCase, assert_equal, assert_almost_equal
  from aubio import notes, source
  import numpy
  from utils import list_all_sounds
label_desc: Use image node_id 2 for calling the aubio_notes_sinewave obj's underlying member method code with example usage: obj.test_sinewave() without return types