def test_charset_encoding(self):
"""Make sure the character set encoding, code type switching
and optimization works correctly"""
known_good = \
{
# dense C encoding
# immediate switch into C-mode, should compress
"1234": [105, 12, 34],
# B only
"hello": [104, 72, 69, 76, 76, 79],
# B switching to C
"HI345678": [104, 40, 41, 99, 34, 56, 78],
"BarCode 1": [104, 34, 65, 82, 35, 79, 68, 69, 0, 17],
}
for text, encoded in known_good.items():
enc = Code128Encoder(text)
self.assertEqual(enc.encoded_text, encoded)
# B => C => B, with leftover digit
self.assertEqual(
Code128Encoder('HI34567A').encoded_text,
[104, 40, 41, 99, 34, 56, 100, 23, 33])
# there was a Bug in C encoding when we have a leftover digit at the end
# see https://github.com/hudora/huBarcode/issues/issue/11
self.assertEqual(
Code128Encoder('12345').encoded_text, [105, 12, 34, 100, 21])
def test_bar_encoding(self):
"""Make sure the bar encoding works correctly"""
bars = "11010010000" + "11000101000" + "11000100010" + \
"10111011110" + "10001011000" + "11100010110" + \
"11000010100" + "10000100110" + "11000111010" + "11"
text = "HI345678"
enc = Code128Encoder(text)
self.assertEqual(enc.bars, bars)
def test_against_generated(self):
"""Compare the output of this library with generated barcodes"""
for index, string in enumerate(Code128Test.test_strings):
encoder = Code128Encoder(string)
encoder.save('test.png')
import filecmp
self.failUnless(filecmp.cmp('test.png',
'hubarcode/code128/test_img/%d.png' % (index + 1)))
def test_check_sum(self):
"""Make sure the checksum is calculated correctly"""
known_good = {
"HI345678": 68,
"BarCode 1": 33
}
for text, chk in known_good.items():
enc = Code128Encoder(text)
self.assertEqual(enc.checksum, chk)
"""Generate test images for code128 barcode encoder"""
from __init__ import Code128Encoder
from code128test import Code128Test
for index, string in enumerate(Code128Test.test_strings):
enc = Code128Encoder(string)
enc.save("hubarcode/code128/test_img/%d.png" % (index + 1))