def METHOD_NAME(self):
    self.call('-x', 'TLEN', self.filename, self.blank_file)
    original_id3 = ID3(self.filename)
    copied_id3 = ID3(self.blank_file)
    self.failUnless('TLEN' in original_id3)
    self.failIf('TLEN' in copied_id3)