code: def test_incorrect_threshold_dissimilarity(self):
      self.assertRaises(ValueError, bsas, [[0], [1], [2]], 1, -1.0)
  
imports: import unittest
  import matplotlib
  from pyclustering.cluster.tests.bsas_templates import bsas_test_template
  from pyclustering.cluster.bsas import bsas
  from pyclustering.utils.metric import type_metric, distance_metric
  from pyclustering.samples.definitions import SIMPLE_SAMPLES
label_desc: Use image node_id 16 for calling the bsas_unit_test obj's underlying member method code with example usage: obj.test_incorrect_threshold_dissimilarity() without return types