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Fixed binary conversion bug, and added corresponding tests

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This commit is contained in:
Andrew Murray 2015-03-02 09:56:47 +11:00
parent aeb1e61aa7
commit f644adbb05
2 changed files with 32 additions and 4 deletions
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8
PIL/_binary.py
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@ -36,7 +36,7 @@ def i16le(c, o=0):
c: string containing bytes to convert c: string containing bytes to convert
o: offset of bytes to convert in string o: offset of bytes to convert in string
""" """
return unpack("<H", c[o:o+2]) return unpack("<H", c[o:o+2])[0]
def i32le(c, o=0): def i32le(c, o=0):
@ -46,15 +46,15 @@ def i32le(c, o=0):
c: string containing bytes to convert c: string containing bytes to convert
o: offset of bytes to convert in string o: offset of bytes to convert in string
""" """
return unpack("<I", c[o:o+4]) return unpack("<I", c[o:o+4])[0]
def i16be(c, o=0): def i16be(c, o=0):
return unpack(">H", c[o:o+2]) return unpack(">H", c[o:o+2])[0]
def i32be(c, o=0): def i32be(c, o=0):
return unpack(">I", c[o:o+4]) return unpack(">I", c[o:o+4])[0]
# Output, le = little endian, be = big endian # Output, le = little endian, be = big endian

28
Tests/test_binary.py Normal file
View File

@ -0,0 +1,28 @@
from helper import unittest, PillowTestCase
from PIL import _binary
class TestBinary(PillowTestCase):
def test_standard(self):
self.assertEqual(_binary.i8(b'*'), 42)
self.assertEqual(_binary.o8(42), b'*')
def test_little_endian(self):
self.assertEqual(_binary.i16le(b'\xff\xff\x00\x00'), 65535)
self.assertEqual(_binary.i32le(b'\xff\xff\x00\x00'), 65535)
self.assertEqual(_binary.o16le(65535), b'\xff\xff')
self.assertEqual(_binary.o32le(65535), b'\xff\xff\x00\x00')
def test_big_endian(self):
self.assertEqual(_binary.i16be(b'\x00\x00\xff\xff'), 0)
self.assertEqual(_binary.i32be(b'\x00\x00\xff\xff'), 65535)
self.assertEqual(_binary.o16be(65535), b'\xff\xff')
self.assertEqual(_binary.o32be(65535), b'\x00\x00\xff\xff')
if __name__ == '__main__':
unittest.main()
# End of file