code: def test_saliency_map_invalid_mode(self):
      message = "'invalid-mode' is invalid value for mode argument"
  
      with self.assertRaisesRegexp(ValueError, message):
          plots.saliency_map(
              self.network, self.image, mode="invalid-mode"
          )
  
file_path: neupy/tests/plots/test_saliency_map.py
imports: import mock
  import numpy
  import matplotlib.pyplot
  from neupy import plots, layers, algorithms
  from neupy.exceptions import InvalidConnection
  from base import BaseTestCase
label_desc: Use image node_id 2 for calling the SaliencyMapTestCase obj's underlying member method code with example usage: obj.test_saliency_map_invalid_mode() without return types