| 1 | n/a | import unittest |
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| 2 | n/a | import colorsys |
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| 3 | n/a | |
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| 4 | n/a | def frange(start, stop, step): |
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| 5 | n/a | while start <= stop: |
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| 6 | n/a | yield start |
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| 7 | n/a | start += step |
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| 8 | n/a | |
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| 9 | n/a | class ColorsysTest(unittest.TestCase): |
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| 10 | n/a | |
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| 11 | n/a | def assertTripleEqual(self, tr1, tr2): |
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| 12 | n/a | self.assertEqual(len(tr1), 3) |
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| 13 | n/a | self.assertEqual(len(tr2), 3) |
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| 14 | n/a | self.assertAlmostEqual(tr1[0], tr2[0]) |
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| 15 | n/a | self.assertAlmostEqual(tr1[1], tr2[1]) |
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| 16 | n/a | self.assertAlmostEqual(tr1[2], tr2[2]) |
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| 17 | n/a | |
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| 18 | n/a | def test_hsv_roundtrip(self): |
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| 19 | n/a | for r in frange(0.0, 1.0, 0.2): |
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| 20 | n/a | for g in frange(0.0, 1.0, 0.2): |
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| 21 | n/a | for b in frange(0.0, 1.0, 0.2): |
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| 22 | n/a | rgb = (r, g, b) |
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| 23 | n/a | self.assertTripleEqual( |
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| 24 | n/a | rgb, |
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| 25 | n/a | colorsys.hsv_to_rgb(*colorsys.rgb_to_hsv(*rgb)) |
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| 26 | n/a | ) |
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| 27 | n/a | |
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| 28 | n/a | def test_hsv_values(self): |
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| 29 | n/a | values = [ |
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| 30 | n/a | # rgb, hsv |
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| 31 | n/a | ((0.0, 0.0, 0.0), ( 0 , 0.0, 0.0)), # black |
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| 32 | n/a | ((0.0, 0.0, 1.0), (4./6., 1.0, 1.0)), # blue |
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| 33 | n/a | ((0.0, 1.0, 0.0), (2./6., 1.0, 1.0)), # green |
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| 34 | n/a | ((0.0, 1.0, 1.0), (3./6., 1.0, 1.0)), # cyan |
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| 35 | n/a | ((1.0, 0.0, 0.0), ( 0 , 1.0, 1.0)), # red |
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| 36 | n/a | ((1.0, 0.0, 1.0), (5./6., 1.0, 1.0)), # purple |
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| 37 | n/a | ((1.0, 1.0, 0.0), (1./6., 1.0, 1.0)), # yellow |
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| 38 | n/a | ((1.0, 1.0, 1.0), ( 0 , 0.0, 1.0)), # white |
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| 39 | n/a | ((0.5, 0.5, 0.5), ( 0 , 0.0, 0.5)), # grey |
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| 40 | n/a | ] |
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| 41 | n/a | for (rgb, hsv) in values: |
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| 42 | n/a | self.assertTripleEqual(hsv, colorsys.rgb_to_hsv(*rgb)) |
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| 43 | n/a | self.assertTripleEqual(rgb, colorsys.hsv_to_rgb(*hsv)) |
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| 44 | n/a | |
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| 45 | n/a | def test_hls_roundtrip(self): |
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| 46 | n/a | for r in frange(0.0, 1.0, 0.2): |
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| 47 | n/a | for g in frange(0.0, 1.0, 0.2): |
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| 48 | n/a | for b in frange(0.0, 1.0, 0.2): |
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| 49 | n/a | rgb = (r, g, b) |
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| 50 | n/a | self.assertTripleEqual( |
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| 51 | n/a | rgb, |
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| 52 | n/a | colorsys.hls_to_rgb(*colorsys.rgb_to_hls(*rgb)) |
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| 53 | n/a | ) |
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| 54 | n/a | |
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| 55 | n/a | def test_hls_values(self): |
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| 56 | n/a | values = [ |
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| 57 | n/a | # rgb, hls |
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| 58 | n/a | ((0.0, 0.0, 0.0), ( 0 , 0.0, 0.0)), # black |
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| 59 | n/a | ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue |
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| 60 | n/a | ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green |
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| 61 | n/a | ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan |
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| 62 | n/a | ((1.0, 0.0, 0.0), ( 0 , 0.5, 1.0)), # red |
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| 63 | n/a | ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple |
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| 64 | n/a | ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow |
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| 65 | n/a | ((1.0, 1.0, 1.0), ( 0 , 1.0, 0.0)), # white |
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| 66 | n/a | ((0.5, 0.5, 0.5), ( 0 , 0.5, 0.0)), # grey |
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| 67 | n/a | ] |
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| 68 | n/a | for (rgb, hls) in values: |
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| 69 | n/a | self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb)) |
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| 70 | n/a | self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) |
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| 71 | n/a | |
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| 72 | n/a | def test_yiq_roundtrip(self): |
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| 73 | n/a | for r in frange(0.0, 1.0, 0.2): |
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| 74 | n/a | for g in frange(0.0, 1.0, 0.2): |
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| 75 | n/a | for b in frange(0.0, 1.0, 0.2): |
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| 76 | n/a | rgb = (r, g, b) |
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| 77 | n/a | self.assertTripleEqual( |
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| 78 | n/a | rgb, |
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| 79 | n/a | colorsys.yiq_to_rgb(*colorsys.rgb_to_yiq(*rgb)) |
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| 80 | n/a | ) |
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| 81 | n/a | |
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| 82 | n/a | def test_yiq_values(self): |
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| 83 | n/a | values = [ |
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| 84 | n/a | # rgb, yiq |
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| 85 | n/a | ((0.0, 0.0, 0.0), (0.0, 0.0, 0.0)), # black |
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| 86 | n/a | ((0.0, 0.0, 1.0), (0.11, -0.3217, 0.3121)), # blue |
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| 87 | n/a | ((0.0, 1.0, 0.0), (0.59, -0.2773, -0.5251)), # green |
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| 88 | n/a | ((0.0, 1.0, 1.0), (0.7, -0.599, -0.213)), # cyan |
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| 89 | n/a | ((1.0, 0.0, 0.0), (0.3, 0.599, 0.213)), # red |
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| 90 | n/a | ((1.0, 0.0, 1.0), (0.41, 0.2773, 0.5251)), # purple |
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| 91 | n/a | ((1.0, 1.0, 0.0), (0.89, 0.3217, -0.3121)), # yellow |
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| 92 | n/a | ((1.0, 1.0, 1.0), (1.0, 0.0, 0.0)), # white |
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| 93 | n/a | ((0.5, 0.5, 0.5), (0.5, 0.0, 0.0)), # grey |
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| 94 | n/a | ] |
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| 95 | n/a | for (rgb, yiq) in values: |
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| 96 | n/a | self.assertTripleEqual(yiq, colorsys.rgb_to_yiq(*rgb)) |
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| 97 | n/a | self.assertTripleEqual(rgb, colorsys.yiq_to_rgb(*yiq)) |
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| 98 | n/a | |
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| 99 | n/a | if __name__ == "__main__": |
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| 100 | n/a | unittest.main() |
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