message: Add a test when factor == lower == upper.
diff: @@ -468,7 +468,8 @@ class RandomContrastTest(keras_parameterized.TestCase):
  @parameterized.named_parameters(('random_contrast_2_by_5', 0.2, 0.5),
  ('random_contrast_2_by_13', 0.2, 1.3),
  - ('random_contrast_5_by_2', 0.5, 0.2))
  + ('random_contrast_5_by_2', 0.5, 0.2),
  + ('random_contrast_10_by_10', 1.0, 1.0))
  def test_random_contrast(self, lower, upper):
  with CustomObjectScope(
  {'RandomContrast': image_preprocessing.RandomContrast}):
  