code: def test_summary_single():
      out = summarisation(summary_context)
      assert type(out) == str, "Summary not a string"
      assert len(out) < len(
          summary_context
      ), "Summary not shorter than input"
  
imports: from backprop import Emotion, ImageClassification, QA, Summarisation, TextClassification, TextGeneration, TextVectorisation
  import numpy
  import torch
  import os
label_desc: Use image node_id 7 for calling a global function with example usage: test_summary_single() without return types