Pillow/Tests/test_image_histogram.py

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from tester import *
from PIL import Image
def test_histogram():
def histogram(mode):
h = lena(mode).histogram()
return len(h), min(h), max(h)
assert_equal(histogram("1"), (256, 0, 8872))
assert_equal(histogram("L"), (256, 0, 199))
assert_equal(histogram("I"), (256, 0, 199))
assert_equal(histogram("F"), (256, 0, 199))
assert_equal(histogram("P"), (256, 0, 2912))
assert_equal(histogram("RGB"), (768, 0, 285))
assert_equal(histogram("RGBA"), (1024, 0, 16384))
assert_equal(histogram("CMYK"), (1024, 0, 16384))
assert_equal(histogram("YCbCr"), (768, 0, 741))