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https://github.com/msgpack/msgpack-python.git
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33e0e86f4e
* use isort * fallback: use BytesIO instead of StringIO. We had dropped Python 2 already.
78 lines
2.6 KiB
Python
78 lines
2.6 KiB
Python
import array
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import msgpack
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from msgpack import ExtType
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def test_pack_ext_type():
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def p(s):
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packer = msgpack.Packer()
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packer.pack_ext_type(0x42, s)
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return packer.bytes()
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assert p(b"A") == b"\xd4\x42A" # fixext 1
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assert p(b"AB") == b"\xd5\x42AB" # fixext 2
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assert p(b"ABCD") == b"\xd6\x42ABCD" # fixext 4
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assert p(b"ABCDEFGH") == b"\xd7\x42ABCDEFGH" # fixext 8
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assert p(b"A" * 16) == b"\xd8\x42" + b"A" * 16 # fixext 16
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assert p(b"ABC") == b"\xc7\x03\x42ABC" # ext 8
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assert p(b"A" * 0x0123) == b"\xc8\x01\x23\x42" + b"A" * 0x0123 # ext 16
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assert p(b"A" * 0x00012345) == b"\xc9\x00\x01\x23\x45\x42" + b"A" * 0x00012345 # ext 32
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def test_unpack_ext_type():
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def check(b, expected):
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assert msgpack.unpackb(b) == expected
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check(b"\xd4\x42A", ExtType(0x42, b"A")) # fixext 1
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check(b"\xd5\x42AB", ExtType(0x42, b"AB")) # fixext 2
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check(b"\xd6\x42ABCD", ExtType(0x42, b"ABCD")) # fixext 4
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check(b"\xd7\x42ABCDEFGH", ExtType(0x42, b"ABCDEFGH")) # fixext 8
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check(b"\xd8\x42" + b"A" * 16, ExtType(0x42, b"A" * 16)) # fixext 16
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check(b"\xc7\x03\x42ABC", ExtType(0x42, b"ABC")) # ext 8
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check(b"\xc8\x01\x23\x42" + b"A" * 0x0123, ExtType(0x42, b"A" * 0x0123)) # ext 16
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check(
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b"\xc9\x00\x01\x23\x45\x42" + b"A" * 0x00012345,
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ExtType(0x42, b"A" * 0x00012345),
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) # ext 32
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def test_extension_type():
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def default(obj):
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print("default called", obj)
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if isinstance(obj, array.array):
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typecode = 123 # application specific typecode
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try:
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data = obj.tobytes()
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except AttributeError:
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data = obj.tostring()
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return ExtType(typecode, data)
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raise TypeError(f"Unknown type object {obj!r}")
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def ext_hook(code, data):
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print("ext_hook called", code, data)
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assert code == 123
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obj = array.array("d")
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obj.frombytes(data)
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return obj
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obj = [42, b"hello", array.array("d", [1.1, 2.2, 3.3])]
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s = msgpack.packb(obj, default=default)
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obj2 = msgpack.unpackb(s, ext_hook=ext_hook)
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assert obj == obj2
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def test_overriding_hooks():
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def default(obj):
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if isinstance(obj, int):
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return {"__type__": "long", "__data__": str(obj)}
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else:
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return obj
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obj = {"testval": 1823746192837461928374619}
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refobj = {"testval": default(obj["testval"])}
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refout = msgpack.packb(refobj)
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assert isinstance(refout, (str, bytes))
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testout = msgpack.packb(obj, default=default)
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assert refout == testout
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