message: Keras added missing test case in image_test
  Missing test cases added
diff: @@ -386,6 +386,8 @@ class TestImage(test.TestCase):
  _ = keras.preprocessing.image.random_shift(x, 0.2, 0.2)
  _ = keras.preprocessing.image.random_shear(x, 2.)
  _ = keras.preprocessing.image.random_zoom(x, (0.5, 0.5))
  + _ = keras.preprocessing.image.apply_channel_shift(x, 2, 2)
  + _ = keras.preprocessing.image.apply_affine_transform(x, 2)
  with self.assertRaises(ValueError):
  keras.preprocessing.image.random_zoom(x, (0, 0, 0))
  _ = keras.preprocessing.image.random_channel_shift(x, 2.)
  