Lib/test/test_rgbimg.py

# Testing rgbimg module

import rgbimg, os, uu

from test_support import verbose, unlink

error = 'test_rgbimg.error'

print 'RGBimg test suite:'

def findfile(file):
	if os.path.isabs(file): return file
	import sys
	print "__file__ =", __file__
	for dn in [os.path.dirname(__file__)] + sys.path:
		fn = os.path.join(dn, file)
		if os.path.exists(fn): return fn
	return file

def testimg(rgb_file, raw_file):
	rgb_file = findfile(rgb_file)
	raw_file = findfile(raw_file)
	width, height = rgbimg.sizeofimage(rgb_file)
	rgb = rgbimg.longimagedata(rgb_file)
	if len(rgb) != width * height * 4:
		raise error, 'bad image length'
	raw = open(raw_file, 'rb').read()
	if rgb != raw:
		raise error, \
		      'images don\'t match for '+rgb_file+' and '+raw_file
	for depth in [1, 3, 4]:
		rgbimg.longstoimage(rgb, width, height, depth, '@.rgb')
	os.unlink('@.rgb')

table = [
    ('testrgb.uue', 'test.rgb'),
    ('testimg.uue', 'test.rawimg'),
    ('testimgr.uue', 'test.rawimg.rev'),
    ]
for source, target in table:
    source = findfile(source)
    target = findfile(target)
    if verbose:
	print "uudecoding", source, "->", target, "..."
    uu.decode(source, target)

if verbose:
    print "testing..."

ttob = rgbimg.ttob(0)
if ttob != 0:
	raise error, 'ttob should start out as zero'

testimg('test.rgb', 'test.rawimg')

ttob = rgbimg.ttob(1)
if ttob != 0:
	raise error, 'ttob should be zero'

testimg('test.rgb', 'test.rawimg.rev')

ttob = rgbimg.ttob(0)
if ttob != 1:
	raise error, 'ttob should be one'

ttob = rgbimg.ttob(0)
if ttob != 0:
	raise error, 'ttob should be zero'

for source, target in table:
    unlink(findfile(target))