text: # !/usr/bin/env python
  # -*- coding: utf-8 -*-
  """
  Defines unit tests for :mod:`colour.adaptation.cie1994` module.
  """
  
  from __future__ import division, unicode_literals
  
  import numpy as np
  import unittest
  from itertools import permutations
  
  from colour.adaptation import chromatic_adaptation_CIE1994
  from colour.utilities import domain_range_scale, ignore_numpy_errors
  
  __author__ = 'Colour Developers'
  __copyright__ = 'Copyright (C) 2013-2019 - Colour Developers'
  __license__ = 'New BSD License - https://opensource.org/licenses/BSD-3-Clause'
  __maintainer__ = 'Colour Developers'
  __email__ = 'colour-developers@colour-science.org'
  __status__ = 'Production'
  
  __all__ = ['TestChromaticAdaptationCIE1994']
  
  
  class TestChromaticAdaptationCIE1994(unittest.TestCase):
      """
      Defines :func:`colour.adaptation.cie1994.chromatic_adaptation_CIE1994`
      definition unit tests methods.
      """
  
      def test_chromatic_adaptation_CIE1994(self):
          """
          Tests :func:`colour.adaptation.cie1994.chromatic_adaptation_CIE1994`
          definition.
          """
  
          np.testing.assert_almost_equal(
              chromatic_adaptation_CIE1994(
                  XYZ_1=np.array([28.00, 21.26, 5.27]),
                  xy_o1=np.array([0.44760, 0.40740]),
                  xy_o2=np.array([0.31270, 0.32900]),
                  Y_o=20,
                  E_o1=1000,
                  E_o2=1000),
              np.array([24.03379521, 21.15621214, 17.64301199]),
              decimal=7)
  
          np.testing.assert_almost_equal(
              chromatic_adaptation_CIE1994(
                  XYZ_1=np.array([21.77, 19.18, 16.73]),
                  xy_o1=np.array([0.31270, 0.32900]),
                  xy_o2=np.array([0.31270, 0.32900]),
                  Y_o=50,
                  E_o1=100,
                  E_o2=1000),
              np.array([21.12891746, 19.42980532, 19.49577765]),
              decimal=7)
  
          np.testing.assert_almost_equal(
              chromatic_adaptation_CIE1994(
                  XYZ_1=np.array([0.07818780, 0.06157201, 0.28099326]) * 100,
                  xy_o1=np.array([0.31270, 0.32900]),
                  xy_o2=np.array([0.37208, 0.37529]),
                  Y_o=20,
                  E_o1=100,
                  E_o2=1000),
              np.array([9.14287406, 9.35843355, 15.95753504]),
              decimal=7)
  
      def test_n_dimensional_chromatic_adaptation_CIE1994(self):
          """
          Tests :func:`colour.adaptation.cie1994.chromatic_adaptation_CIE1994`
          definition n-dimensional arrays support.
          """
  
          XYZ_1 = np.array([28.00, 21.26, 5.27])
          xy_o1 = np.array([0.44760, 0.40740])
          xy_o2 = np.array([0.31270, 0.32900])
          Y_o = 20
          E_o1 = 1000
          E_o2 = 1000
          XYZ_2 = chromatic_adaptation_CIE1994(XYZ_1, xy_o1, xy_o2, Y_o, E_o1,
                                               E_o2)
  
          XYZ_1 = np.tile(XYZ_1, (6, 1))
          XYZ_2 = np.tile(XYZ_2, (6, 1))
          np.testing.assert_almost_equal(
              chromatic_adaptation_CIE1994(XYZ_1, xy_o1, xy_o2, Y_o, E_o1, E_o2),
              XYZ_2,
              decimal=7)
  
          xy_o1 = np.tile(xy_o1, (6, 1))
          xy_o2 = np.tile(xy_o2, (6, 1))
          Y_o = np.tile(Y_o, 6)
          E_o1 = np.tile(E_o1, 6)
          E_o2 = np.tile(E_o2, 6)
          np.testing.assert_almost_equal(
              chromatic_adaptation_CIE1994(XYZ_1, xy_o1, xy_o2, Y_o, E_o1, E_o2),
              XYZ_2,
              decimal=7)
  
          XYZ_1 = np.reshape(XYZ_1, (2, 3, 3))
          xy_o1 = np.reshape(xy_o1, (2, 3, 2))
          xy_o2 = np.reshape(xy_o2, (2, 3, 2))
          Y_o = np.reshape(Y_o, (2, 3))
          E_o1 = np.reshape(E_o1, (2, 3))
          E_o2 = np.reshape(E_o2, (2, 3))
          XYZ_2 = np.reshape(XYZ_2, (2, 3, 3))
          np.testing.assert_almost_equal(
              chromatic_adaptation_CIE1994(XYZ_1, xy_o1, xy_o2, Y_o, E_o1, E_o2),
              XYZ_2,
              decimal=7)
  
      def test_domain_range_scale_chromatic_adaptation_CIE1994(self):
          """
          Tests :func:`colour.adaptation.cie1994.chromatic_adaptation_CIE1994`
          definition domain and range scale support.
          """
  
          XYZ_1 = np.array([28.00, 21.26, 5.27])
          xy_o1 = np.array([0.44760, 0.40740])
          xy_o2 = np.array([0.31270, 0.32900])
          Y_o = 20
          E_o1 = 1000
          E_o2 = 1000
          XYZ_2 = chromatic_adaptation_CIE1994(XYZ_1, xy_o1, xy_o2, Y_o, E_o1,
                                               E_o2)
  
          d_r = (('reference', 1), (1, 0.01), (100, 1))
          for scale, factor in d_r:
              with domain_range_scale(scale):
                  np.testing.assert_almost_equal(
                      chromatic_adaptation_CIE1994(XYZ_1 * factor, xy_o1, xy_o2,
                                                   Y_o * factor, E_o1, E_o2),
                      XYZ_2 * factor,
                      decimal=7)
  
      @ignore_numpy_errors
      def test_nan_chromatic_adaptation_CIE1994(self):
          """
          Tests :func:`colour.adaptation.cie1994.chromatic_adaptation_CIE1994`
          definition nan support.
          """
  
          cases = [-1.0, 0.0, 1.0, -np.inf, np.inf, np.nan]
          cases = set(permutations(cases * 3, r=3))
          for case in cases:
              XYZ_1 = np.array(case)
              xy_o1 = np.array(case[0:2])
              xy_o2 = np.array(case[0:2])
              Y_o = case[0]
              E_o1 = case[0]
              E_o2 = case[0]
              chromatic_adaptation_CIE1994(XYZ_1, xy_o1, xy_o2, Y_o, E_o1, E_o2)
  
  
  if __name__ == '__main__':
      unittest.main()
  