Walter Dörwald | c60c203 | 2004-04-28 17:07:50 +0000 | [diff] [blame] | 1 | import unittest, test.test_support |
| 2 | import colorsys |
| 3 | |
| 4 | def frange(start, stop, step): |
| 5 | while start <= stop: |
| 6 | yield start |
Neal Norwitz | cf48638 | 2005-11-02 05:54:27 +0000 | [diff] [blame] | 7 | start += step |
Walter Dörwald | c60c203 | 2004-04-28 17:07:50 +0000 | [diff] [blame] | 8 | |
| 9 | class ColorsysTest(unittest.TestCase): |
| 10 | |
| 11 | def assertTripleEqual(self, tr1, tr2): |
| 12 | self.assertEqual(len(tr1), 3) |
| 13 | self.assertEqual(len(tr2), 3) |
| 14 | self.assertAlmostEqual(tr1[0], tr2[0]) |
| 15 | self.assertAlmostEqual(tr1[1], tr2[1]) |
| 16 | self.assertAlmostEqual(tr1[2], tr2[2]) |
| 17 | |
| 18 | def test_hsv_roundtrip(self): |
| 19 | for r in frange(0.0, 1.0, 0.2): |
| 20 | for g in frange(0.0, 1.0, 0.2): |
| 21 | for b in frange(0.0, 1.0, 0.2): |
| 22 | rgb = (r, g, b) |
| 23 | self.assertTripleEqual( |
| 24 | rgb, |
| 25 | colorsys.hsv_to_rgb(*colorsys.rgb_to_hsv(*rgb)) |
| 26 | ) |
| 27 | |
| 28 | def test_hsv_values(self): |
| 29 | values = [ |
| 30 | # rgb, hsv |
| 31 | ((0.0, 0.0, 0.0), ( 0 , 0.0, 0.0)), # black |
| 32 | ((0.0, 0.0, 1.0), (4./6., 1.0, 1.0)), # blue |
| 33 | ((0.0, 1.0, 0.0), (2./6., 1.0, 1.0)), # green |
| 34 | ((0.0, 1.0, 1.0), (3./6., 1.0, 1.0)), # cyan |
| 35 | ((1.0, 0.0, 0.0), ( 0 , 1.0, 1.0)), # red |
| 36 | ((1.0, 0.0, 1.0), (5./6., 1.0, 1.0)), # purple |
| 37 | ((1.0, 1.0, 0.0), (1./6., 1.0, 1.0)), # yellow |
| 38 | ((1.0, 1.0, 1.0), ( 0 , 0.0, 1.0)), # white |
| 39 | ((0.5, 0.5, 0.5), ( 0 , 0.0, 0.5)), # grey |
| 40 | ] |
| 41 | for (rgb, hsv) in values: |
| 42 | self.assertTripleEqual(hsv, colorsys.rgb_to_hsv(*rgb)) |
| 43 | self.assertTripleEqual(rgb, colorsys.hsv_to_rgb(*hsv)) |
| 44 | |
| 45 | def test_hls_roundtrip(self): |
| 46 | for r in frange(0.0, 1.0, 0.2): |
| 47 | for g in frange(0.0, 1.0, 0.2): |
| 48 | for b in frange(0.0, 1.0, 0.2): |
| 49 | rgb = (r, g, b) |
| 50 | self.assertTripleEqual( |
| 51 | rgb, |
| 52 | colorsys.hls_to_rgb(*colorsys.rgb_to_hls(*rgb)) |
| 53 | ) |
| 54 | |
| 55 | def test_hls_values(self): |
| 56 | values = [ |
| 57 | # rgb, hls |
| 58 | ((0.0, 0.0, 0.0), ( 0 , 0.0, 0.0)), # black |
| 59 | ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue |
| 60 | ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green |
| 61 | ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan |
| 62 | ((1.0, 0.0, 0.0), ( 0 , 0.5, 1.0)), # red |
| 63 | ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple |
| 64 | ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow |
| 65 | ((1.0, 1.0, 1.0), ( 0 , 1.0, 0.0)), # white |
| 66 | ((0.5, 0.5, 0.5), ( 0 , 0.5, 0.0)), # grey |
| 67 | ] |
| 68 | for (rgb, hls) in values: |
| 69 | self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb)) |
| 70 | self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) |
| 71 | |
| 72 | def test_main(): |
| 73 | test.test_support.run_unittest(ColorsysTest) |
| 74 | |
| 75 | if __name__ == "__main__": |
| 76 | test_main() |