class_docstr: Test DecisionBoundariesVisualizer
class_docstr_tok: ["Test","DecisionBoundariesVisualizer"]
docstr: Assert no errors during kNN DecisionBoundariesVisualizer integration
docstr_tok: ["Assert","no","errors","during","kNN","DecisionBoundariesVisualizer","integration"]
code: def test_decision_boundaries(self):
      """
      Assert no errors during kNN DecisionBoundariesVisualizer integration
      """
      model = neighbors.KNeighborsClassifier(3)
      viz = DecisionViz(model)
      viz.fit_draw_show(X_two_cols, y=y)
  
imports: import sys
  import pytest
  import numpy
  from unittest import mock
  from tests.base import VisualTestCase
  from yellowbrick.contrib.classifier import *
  from yellowbrick.exceptions import YellowbrickTypeError
  from yellowbrick.exceptions import YellowbrickValueError
  from sklearn import datasets
  from sklearn import neighbors
  from sklearn import naive_bayes
label_desc: Use image node_id 1 for calling the TestDecisionBoundariesVisualizer obj's underlying member method code with example usage: obj.test_decision_boundaries() without return types