code: def testInvalidFile(self):
      p = Pool()
      self.assertRaises(
          RuntimeError, lambda: YamlOutput(filename="")(p)
      )
  
imports: from essentia_test import *
  from essentia._essentia import version
  import os
  import json
label_desc: Use image node_id 16 for calling the TestYamlOutput obj's underlying member method code with example usage: obj.testInvalidFile() without return types