def test_log_two_points(self):
scale = _Palette('#000000', '#FFFFFF')
self.assertEqual(scale.log(
4, 8), [[0, 'rgb(0.0, 0.0, 0.0)'], [0.5, 'rgb(0.0, 0.0, 0.0)'],
[1, 'rgb(255.0, 255.0, 255.0)']])
self.assertEqual(scale.log(
4, 32), [[0, 'rgb(0.0, 0.0, 0.0)'], [0.125, 'rgb(0.0, 0.0, 0.0)'],
[0.25, 'rgb(85.0, 85.0, 85.0)'],
[0.5, 'rgb(170.0, 170.0, 170.0)'],
[1, 'rgb(255.0, 255.0, 255.0)']])
def test_log_interpolations_two_points(self):
scale = _Palette('#000000', '#FFFFFF')
self.assertEqual(
scale._log_interpolations(4, 64),
[[
(0.0, 0.0, 0.0), # 4
(63.75, 63.75, 63.75), # 8
(127.5, 127.5, 127.5), # 16
(191.25, 191.25, 191.25), # 32
(255.0, 255.0, 255.0)
]]) # 64
def test_log_three_points(self):
scale = _Palette('#0000FF', '#FFFFFF', '#FF0000')
self.assertEqual(
scale.log(4, 8),
[[0, 'rgb(0.0, 0.0, 255.0)'], [0.25, 'rgb(0.0, 0.0, 255.0)'],
[0.5, 'rgb(255.0, 255.0, 255.0)'], [1, 'rgb(255.0, 0.0, 0.0)']])
self.assertEqual(
scale.log(4, 128),
[[0, 'rgb(0.0, 0.0, 255.0)'], [0.0625, 'rgb(0.0, 0.0, 255.0)'],
[0.125, 'rgb(127.5, 127.5, 255.0)'],
[0.25, 'rgb(255.0, 255.0, 255.0)'],
[0.5, 'rgb(255.0, 127.5, 127.5)'], [1, 'rgb(255.0, 0.0, 0.0)']])
def test_log_interpolations_three_points(self):
scale = _Palette('#0000FF', '#FFFFFF', '#FF0000')
self.assertEqual(
scale._log_interpolations(4, 8),
[[(0.0, 0.0, 255.0),
(255.0, 255.0, 255.0)], [(255.0, 255.0, 255.0),
(255.0, 0.0, 0.0)]])
self.assertEqual(scale._log_interpolations(4, 64),
[[(0.0, 0.0, 255.0), (127.5, 127.5, 255.0),
(255.0, 255.0, 255.0)],
[(255.0, 255.0, 255.0), (255.0, 127.5, 127.5),
(255.0, 0.0, 0.0)]])
def test_linear_two_points(self):
scale = _Palette('#000000', '#FFFFFF')
self.assertEqual(scale.linear(),
[[0, 'rgb(0,0,0)'], [1, 'rgb(255,255,255)']])
def test_linear_three_points_reversed(self):
scale = _Palette('#0000FF', '#FFFFFF', '#FF0000').reversed
self.assertEqual(scale.linear(),
[[0, 'rgb(255,0,0)'], [0.5, 'rgb(255,255,255)'],
[1, 'rgb(0,0,255)']])
