code: def test_visualize_saliency(model, data):
      # FIXME Can't set None to filter_indices with Theano backend.
      # To get green test, it set zero.
      # grads = visualize_saliency(model, -1, filter_indices=None, seed_input=data)
      grads = visualize_saliency(
          model, -1, filter_indices=0, seed_input=data
      )
      assert grads.shape == (28, 28)
  
file_path: keras-vis/tests/vis/visualization/test_saliency.py
imports: import pytest
  import numpy
  import keras.backend
  from keras.layers import Input, Dense, Flatten
  from keras.models import Model
  from vis.losses import ActivationMaximization
  from vis.visualization.saliency import visualize_saliency, visualize_saliency_with_losses
label_desc: Use image node_id 3 for calling a global function with example usage: test_visualize_saliency(model, data) without return types