code: def test_prediction_scores(self):
      pred_scores = self.clf.decision_function(self.X_test)
  
      # check score shapes
      assert_equal(pred_scores.shape[0], self.X_test.shape[0])
  
      # check performance
      assert roc_auc_score(self.y_test, pred_scores) >= self.roc_floor
  
imports: from __future__ import division
  from __future__ import print_function
  import os
  import sys
  import unittest
  from numpy.testing import assert_equal
  from numpy.testing import assert_raises
  from sklearn.base import clone
  from sklearn.metrics import roc_auc_score
  from pyod.models.rgraph import RGraph
  from pyod.utils.data import generate_data
label_desc: Use image node_id 4 for calling the TestRGraph obj's underlying member method code with example usage: obj.test_prediction_scores() without return types