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refactor unpack, add unpack_from

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This commit is contained in:
Bob Ippolito 2006-05-24 15:32:06 +00:00
parent d5e0dc51cf
commit eb62127842
3 changed files with 168 additions and 69 deletions
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41
Lib/test/test_struct.py
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@ -437,3 +437,44 @@ def test_705836():
TestFailed("expected OverflowError")
test_705836()
def test_unpack_from():
test_string = 'abcd01234'
fmt = '4s'
s = struct.Struct(fmt)
for cls in (str, buffer):
data = cls(test_string)
assert s.unpack_from(data) == ('abcd',)
assert s.unpack_from(data, 2) == ('cd01',)
assert s.unpack_from(data, 4) == ('0123',)
for i in xrange(6):
assert s.unpack_from(data, i) == (data[i:i+4],)
for i in xrange(6, len(test_string) + 1):
simple_err(s.unpack_from, data, i)
for cls in (str, buffer):
data = cls(test_string)
assert struct.unpack_from(fmt, data) == ('abcd',)
assert struct.unpack_from(fmt, data, 2) == ('cd01',)
assert struct.unpack_from(fmt, data, 4) == ('0123',)
for i in xrange(6):
assert struct.unpack_from(fmt, data, i) == (data[i:i+4],)
for i in xrange(6, len(test_string) + 1):
simple_err(struct.unpack_from, fmt, data, i)
test_unpack_from()
def test_1229380():
for endian in ('', '>', '<'):
for cls in (int, long):
for fmt in ('B', 'H', 'I', 'L'):
any_err(struct.pack, endian + fmt, cls(-1))
any_err(struct.pack, endian + 'B', cls(300))
any_err(struct.pack, endian + 'H', cls(70000))
any_err(struct.pack, endian + 'I', sys.maxint * 4L)
any_err(struct.pack, endian + 'L', sys.maxint * 4L)
if 0:
# TODO: bug #1229380
test_1229380()