text: # Copyright 2020 MONAI Consortium
  # 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.
  
  import unittest
  
  import numpy as np
  
  from monai.transforms import ScaleIntensityRanged
  from tests.utils import NumpyImageTestCase2D
  
  
  class IntensityScaleIntensityRanged(NumpyImageTestCase2D):
  
      def test_image_scale_intensity_ranged(self):
          key = 'img'
          scaler = ScaleIntensityRanged(keys=key, a_min=20, a_max=108, b_min=50, b_max=80)
          scaled = scaler({key: self.imt})
          expected = (self.imt - 20) / 88
          expected = expected * 30 + 50
          self.assertTrue(np.allclose(scaled[key], expected))
  
  
  if __name__ == '__main__':
      unittest.main()
  