code: def test_read(self):
      framesize = self.nchannels * self.sampwidth
      chunk1 = self.frames[: 2 * framesize]
      chunk2 = self.frames[2 * framesize : 4 * framesize]
      f = self.f = self.module.open(self.sndfilepath)
      self.assertEqual(f.readframes(0), b"")
      self.assertEqual(f.tell(), 0)
      self.assertEqual(f.readframes(2), chunk1)
      f.rewind()
      pos0 = f.tell()
      self.assertEqual(pos0, 0)
      self.assertEqual(f.readframes(2), chunk1)
      pos2 = f.tell()
      self.assertEqual(pos2, 2)
      self.assertEqual(f.readframes(2), chunk2)
      f.setpos(pos2)
      self.assertEqual(f.readframes(2), chunk2)
      f.setpos(pos0)
      self.assertEqual(f.readframes(2), chunk1)
      with self.assertRaises(self.module.Error):
          f.setpos(-1)
      with self.assertRaises(self.module.Error):
          f.setpos(f.getnframes() + 1)
  
imports: from test.support import findfile
  from test.support.os_helper import TESTFN, unlink
  import array
  import io
  import pickle
label_desc: Use image node_id 4 for calling the AudioTestsWithSourceFile obj's underlying member method code with example usage: obj.test_read() without return types