diff options
Diffstat (limited to 'Lib/test/test_colorsys.py')
| -rw-r--r-- | Lib/test/test_colorsys.py | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/Lib/test/test_colorsys.py b/Lib/test/test_colorsys.py index e405b8a4d0..a24e3adcb4 100644 --- a/Lib/test/test_colorsys.py +++ b/Lib/test/test_colorsys.py @@ -1,4 +1,4 @@ -import unittest, test.support +import unittest import colorsys def frange(start, stop, step): @@ -69,8 +69,32 @@ class ColorsysTest(unittest.TestCase): self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb)) self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) -def test_main(): - test.support.run_unittest(ColorsysTest) + def test_yiq_roundtrip(self): + for r in frange(0.0, 1.0, 0.2): + for g in frange(0.0, 1.0, 0.2): + for b in frange(0.0, 1.0, 0.2): + rgb = (r, g, b) + self.assertTripleEqual( + rgb, + colorsys.yiq_to_rgb(*colorsys.rgb_to_yiq(*rgb)) + ) + + def test_yiq_values(self): + values = [ + # rgb, yiq + ((0.0, 0.0, 0.0), (0.0, 0.0, 0.0)), # black + ((0.0, 0.0, 1.0), (0.11, -0.3217, 0.3121)), # blue + ((0.0, 1.0, 0.0), (0.59, -0.2773, -0.5251)), # green + ((0.0, 1.0, 1.0), (0.7, -0.599, -0.213)), # cyan + ((1.0, 0.0, 0.0), (0.3, 0.599, 0.213)), # red + ((1.0, 0.0, 1.0), (0.41, 0.2773, 0.5251)), # purple + ((1.0, 1.0, 0.0), (0.89, 0.3217, -0.3121)), # yellow + ((1.0, 1.0, 1.0), (1.0, 0.0, 0.0)), # white + ((0.5, 0.5, 0.5), (0.5, 0.0, 0.0)), # grey + ] + for (rgb, yiq) in values: + self.assertTripleEqual(yiq, colorsys.rgb_to_yiq(*rgb)) + self.assertTripleEqual(rgb, colorsys.yiq_to_rgb(*yiq)) if __name__ == "__main__": - test_main() + unittest.main() |