code: def test_incorrect_eps(self):
      self.assertRaises(ValueError, dbscan, [[0], [1], [2]], -1.0, 1)
  
imports: import unittest
  import matplotlib
  from pyclustering.cluster.tests.dbscan_templates import DbscanTestTemplates
  from pyclustering.cluster.dbscan import dbscan
  from pyclustering.samples.definitions import SIMPLE_SAMPLES, SIMPLE_ANSWERS
  from pyclustering.samples.definitions import FCPS_SAMPLES
label_desc: Use image node_id 34 for calling the DbscsanUnitTest obj's underlying member method code with example usage: obj.test_incorrect_eps() without return types