class_docstr: Test DecisionBoundariesVisualizer
class_docstr_tok: ["Test","DecisionBoundariesVisualizer"]
docstr: Test integration of visualizer with numpy arrays
docstr_tok: ["Test","integration","of","visualizer","with","numpy","arrays"]
code: def test_integrated_scatter_numpy_arrays_no_names(self):
      """
      Test integration of visualizer with numpy arrays
      """
      model = neighbors.KNeighborsClassifier(n_neighbors=3)
  
      visualizer = DecisionBoundariesVisualizer(model, features=[1, 2])
      visualizer.fit_draw_show(X, y)
      assert visualizer.features_ == [1, 2]
  
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 18 for calling the TestDecisionBoundariesVisualizer obj's underlying member method code with example usage: obj.test_integrated_scatter_numpy_arrays_no_names() without return types