text: # Copyright 2019 Akiomi Kamakura
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from PIL import ImageChops
  
  from pilgram import css
  from pilgram import util
  from pilgram.css.blending.tests.helpers import assert_alpha_support
  
  
  def test_darken():
      cb = util.fill((2, 2), [255, 128, 0])
      cs = util.fill((2, 2), [0, 128, 255])
  
      actual = css.blending.darken(cb, cs)
      expected = ImageChops.darker(cb, cs)
      assert actual == expected
  
  
  def test_overlay_alpha_support(mocker):
      assert_alpha_support(css.blending.darken)
  