code: def testInvalidInput(self):
      self.assertComputeFails(IDCT(), [])  # = testEmpty
      self.assertComputeFails(
          IDCT(outputSize=2, inputSize=1), [0, 2, 4]
      )
  
imports: from essentia_test import *
label_desc: Use image node_id 5 for calling the TestIDCT obj's underlying member method code with example usage: obj.testInvalidInput() without return types