Pillow/Tests/test_image_histogram.py

from helper import unittest, PillowTestCase, tearDownModule, lena


class TestImageHistogram(PillowTestCase):

    def test_histogram(self):

        def histogram(mode):
            h = lena(mode).histogram()
            return len(h), min(h), max(h)

        self.assertEqual(histogram("1"), (256, 0, 8872))
        self.assertEqual(histogram("L"), (256, 0, 199))
        self.assertEqual(histogram("I"), (256, 0, 199))
        self.assertEqual(histogram("F"), (256, 0, 199))
        self.assertEqual(histogram("P"), (256, 0, 2912))
        self.assertEqual(histogram("RGB"), (768, 0, 285))
        self.assertEqual(histogram("RGBA"), (1024, 0, 16384))
        self.assertEqual(histogram("CMYK"), (1024, 0, 16384))
        self.assertEqual(histogram("YCbCr"), (768, 0, 741))


if __name__ == '__main__':
    unittest.main()

# End of file