code: def testCoreInterfaceIntInputData(self):
      dbscan_instance = dbscan(
          [[1], [2], [3], [20], [21], [22]], 3, 2, True
      )
      dbscan_instance.process()
      assert len(dbscan_instance.get_clusters()) == 2
  
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
  from pyclustering.core.tests import remove_library
label_desc: Use image node_id 12 for calling the DbscanIntegrationTest obj's underlying member method code with example usage: obj.testCoreInterfaceIntInputData() without return types