code: def test_incorrect_data(self):
      self.assertRaises(ValueError, clarans, [], 1, 0, 0)
  
file_path: pyclustering/pyclustering/cluster/tests/unit/ut_clarans.py
imports: import unittest
  import matplotlib
  from pyclustering.samples.definitions import SIMPLE_SAMPLES
  from pyclustering.utils import read_sample
  from pyclustering.cluster.clarans import clarans
label_desc: Use image node_id 10 for calling the ClaransUnitTest obj's underlying member method code with example usage: obj.test_incorrect_data() without return types