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from __future__ import print_function
import array
import msgpack
from msgpack import ExtType
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" + b"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_ext_type():
def check(b, expected):
assert msgpack.unpackb(b) == expected
check(b"\xd4\x42A", ExtType(0x42, b"A")) # fixext 1
check(b"\xd5\x42AB", ExtType(0x42, b"AB")) # fixext 2
check(b"\xd6\x42ABCD", ExtType(0x42, b"ABCD")) # fixext 4
check(b"\xd7\x42ABCDEFGH", ExtType(0x42, b"ABCDEFGH")) # fixext 8
check(b"\xd8\x42" + b"A" * 16, ExtType(0x42, b"A" * 16)) # fixext 16
check(b"\xc7\x03\x42ABC", ExtType(0x42, b"ABC")) # ext 8
check(b"\xc8\x01\x23\x42" + b"A" * 0x0123, ExtType(0x42, b"A" * 0x0123)) # ext 16
check(
b"\xc9\x00\x01\x23\x45\x42" + b"A" * 0x00012345,
ExtType(0x42, b"A" * 0x00012345),
) # ext 32
def test_extension_type():
def default(obj):
print("default called", obj)
if isinstance(obj, array.array):
typecode = 123 # application specific typecode
try:
data = obj.tobytes()
except AttributeError:
data = obj.tostring()
return ExtType(typecode, data)
raise TypeError("Unknown type object %r" % (obj,))
def ext_hook(code, data):
print("ext_hook called", code, data)
assert code == 123
obj = array.array("d")
try:
obj.frombytes(data)
except AttributeError: # PY2
obj.fromstring(data)
return obj
obj = [42, b"hello", array.array("d", [1.1, 2.2, 3.3])]
s = msgpack.packb(obj, default=default)
obj2 = msgpack.unpackb(s, ext_hook=ext_hook)
assert obj == obj2
import sys
if sys.version > "3":
long = int
def test_overriding_hooks():
def default(obj):
if isinstance(obj, long):
return {"__type__": "long", "__data__": str(obj)}
else:
return obj
obj = {"testval": long(1823746192837461928374619)}
refobj = {"testval": default(obj["testval"])}
refout = msgpack.packb(refobj)
assert isinstance(refout, (str, bytes))
testout = msgpack.packb(obj, default=default)
assert refout == testout
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