code: def test_orthogonal_regularizer_mode_validation(self):
      with self.assertRaises(ValueError) as context:
          regularizers.OrthogonalRegularizer(
              factor=0.01, mode="invalid_mode"
          )
  
      expected_message = (
          'Invalid value for argument `mode`. Expected one of {"rows", '
          '"columns"}. Received: mode=invalid_mode'
      )
      self.assertEqual(str(context.exception), expected_message)
  
imports: import numpy
  from keras import backend
  from keras import regularizers
  from keras import testing
  from keras.regularizers.regularizers import validate_float_arg
label_desc: Use image node_id 8 for calling the RegularizersTest obj's underlying member method code with example usage: obj.test_orthogonal_regularizer_mode_validation() without return types