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import array
import msgpack
def test_pack_ext_type():
def p(s):
packer = msgpack.Packer()
packer.pack_ext_type(0x42, s)
return packer.bytes()
assert p(b'A') == b'\xd4\x42A' # fixext 1
assert p(b'AB') == b'\xd5\x42AB' # fixext 2
assert p(b'ABCD') == b'\xd6\x42ABCD' # fixext 4
assert p(b'ABCDEFGH') == b'\xd7\x42ABCDEFGH' # fixext 8
assert p(b'A'*16) == b'\xd8\x42' + 'A'*16 # fixext 16
assert p(b'ABC') == b'\xc7\x03\x42ABC' # ext 8
assert p(b'A'*0x0123) == b'\xc8\x01\x23\x42' + b'A'*0x0123 # ext 16
assert p(b'A'*0x00012345) == b'\xc9\x00\x01\x23\x45\x42' + b'A'*0x00012345 # ext 32
def test_unpack_extended_type():
class MyUnpacker(msgpack.Unpacker):
def read_extended_type(self, typecode, data):
return (typecode, data)
def u(s):
unpacker = MyUnpacker()
unpacker.feed(s)
return unpacker.unpack_one()
assert u('\xd4\x42A') == (0x42, 'A') # fixext 1
assert u('\xd5\x42AB') == (0x42, 'AB') # fixext 2
assert u('\xd6\x42ABCD') == (0x42, 'ABCD') # fixext 4
assert u('\xd7\x42ABCDEFGH') == (0x42, 'ABCDEFGH') # fixext 8
assert u('\xd8\x42' + 'A'*16) == (0x42, 'A'*16) # fixext 16
assert u('\xc7\x03\x42ABC') == (0x42, 'ABC') # ext 8
assert (u('\xc8\x01\x23\x42' + 'A'*0x0123) ==
(0x42, 'A'*0x0123)) # ext 16
assert (u('\xc9\x00\x01\x23\x45\x42' + 'A'*0x00012345) ==
(0x42, 'A'*0x00012345)) # ext 32
def test_extension_type():
class MyPacker(msgpack.Packer):
def handle_unknown_type(self, obj):
if isinstance(obj, array.array):
typecode = 123 # application specific typecode
data = obj.tostring()
self.pack_ext_type(typecode, data)
return True
class MyUnpacker(msgpack.Unpacker):
def read_extended_type(self, typecode, data):
assert typecode == 123
obj = array.array('d')
obj.fromstring(data)
return obj
obj = [42, 'hello', array.array('d', [1.1, 2.2, 3.3])]
packer = MyPacker()
unpacker = MyUnpacker(None)
s = packer.pack(obj)
unpacker.feed(s)
obj2 = unpacker.unpack_one()
assert obj == obj2
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