code: def test_get_cardinality_with_node(self):
      self.graph.add_edges_from([(("a", "b"), ("a", "c"))])
      phi1 = DiscreteFactor(["a", "b"], [1, 2], np.random.rand(2))
      phi2 = DiscreteFactor(["a", "c"], [1, 2], np.random.rand(2))
      self.graph.add_factors(phi1, phi2)
      self.assertEqual(self.graph.get_cardinality("a"), 1)
      self.assertEqual(self.graph.get_cardinality("b"), 2)
      self.assertEqual(self.graph.get_cardinality("c"), 2)
  
imports: import unittest
  import numpy
  from pgmpy.factors.discrete import DiscreteFactor
  from pgmpy.models import ClusterGraph
  from pgmpy.tests import help_functions
label_desc: Use image node_id 3 for calling the TestClusterGraphMethods obj's underlying member method code with example usage: obj.test_get_cardinality_with_node() without return types