variance minimization unittest

Author: minhitbk

art/defences/variance_minimization_unittest.py

@@ -21,6 +21,7 @@ def test_one_channel(self):
         self.assertTrue((preprocessed_x.shape == x.shape))
         self.assertTrue((preprocessed_x <= 1.0).all())
         self.assertTrue((preprocessed_x >= 0.0).all())
+        self.assertFalse((preprocessed_x == x).all())
 
     def test_three_channels(self):
         (train_features, train_labels), (_, _) = cifar10.load_data()
@@ -30,6 +31,7 @@ def test_three_channels(self):
         self.assertTrue((preprocessed_x.shape == x.shape))
         self.assertTrue((preprocessed_x <= 1.0).all())
         self.assertTrue((preprocessed_x >= 0.0).all())
+        self.assertFalse((preprocessed_x == x).all())
 
 
 if __name__ == '__main__':