code: def test_incorrect_amount_clusters(self):
      self.assertRaises(ValueError, agglomerative, [[0], [1], [2]], -1)
      self.assertRaises(ValueError, agglomerative, [[0], [1], [2]], 0)
  
imports: import unittest
  import matplotlib
  from pyclustering.cluster.tests.agglomerative_templates import AgglomerativeTestTemplates
  from pyclustering.samples.definitions import SIMPLE_SAMPLES
  from pyclustering.cluster.agglomerative import agglomerative, type_link
label_desc: Use image node_id 42 for calling the AgglomerativeUnitTests obj's underlying member method code with example usage: obj.test_incorrect_amount_clusters() without return types