class_docstr: Unit tests for essentia CoverSongSimilarity algorithm
code: def testEmpty(self):
      self.assertComputeFails(CoverSongSimilarity(), [])
  
imports: from essentia_test import *
label_desc: Use image node_id 1 for calling the TestCoverSongSimilarity obj's underlying member method code with example usage: obj.testEmpty() without return types