msgpack-python/test/test_pack.py

#!/usr/bin/env python
# coding: utf-8
from __future__ import absolute_import, division, print_function, unicode_literals

from collections import OrderedDict
from io import BytesIO
import struct
import sys

import pytest
from pytest import raises, xfail

from msgpack import packb, unpackb, Unpacker, Packer, pack


def check(data, use_list=False):
    re = unpackb(packb(data), use_list=use_list)
    assert re == data


def testPack():
    test_data = [
        0,
        1,
        127,
        128,
        255,
        256,
        65535,
        65536,
        4294967295,
        4294967296,
        -1,
        -32,
        -33,
        -128,
        -129,
        -32768,
        -32769,
        -4294967296,
        -4294967297,
        1.0,
        b"",
        b"a",
        b"a" * 31,
        b"a" * 32,
        None,
        True,
        False,
        (),
        ((),),
        ((), None,),
        {None: 0},
        (1 << 23),
    ]
    for td in test_data:
        check(td)


def testPackUnicode():
    test_data = ["", "abcd", ["defgh"], "Русский текст"]
    for td in test_data:
        re = unpackb(packb(td), use_list=1, raw=False)
        assert re == td
        packer = Packer()
        data = packer.pack(td)
        re = Unpacker(BytesIO(data), raw=False, use_list=1).unpack()
        assert re == td


def testPackBytes():
    test_data = [
        b"",
        b"abcd",
        (b"defgh",),
    ]
    for td in test_data:
        check(td)


def testPackByteArrays():
    test_data = [
        bytearray(b""),
        bytearray(b"abcd"),
        (bytearray(b"defgh"),),
    ]
    for td in test_data:
        check(td)


@pytest.mark.skipif(
    sys.version_info < (3, 0), reason="Python 2 passes invalid surrogates"
)
def testIgnoreUnicodeErrors():
    re = unpackb(
        packb(b"abc\xeddef", use_bin_type=False), raw=False, unicode_errors="ignore"
    )
    assert re == "abcdef"


def testStrictUnicodeUnpack():
    packed = packb(b"abc\xeddef", use_bin_type=False)
    with pytest.raises(UnicodeDecodeError):
        unpackb(packed, raw=False, use_list=1)


@pytest.mark.skipif(
    sys.version_info < (3, 0), reason="Python 2 passes invalid surrogates"
)
def testIgnoreErrorsPack():
    re = unpackb(
        packb("abc\uDC80\uDCFFdef", use_bin_type=True, unicode_errors="ignore"),
        raw=False,
        use_list=1,
    )
    assert re == "abcdef"


def testDecodeBinary():
    re = unpackb(packb(b"abc"), use_list=1)
    assert re == b"abc"


def testPackFloat():
    assert packb(1.0, use_single_float=True) == b"\xca" + struct.pack(str(">f"), 1.0)
    assert packb(1.0, use_single_float=False) == b"\xcb" + struct.pack(str(">d"), 1.0)


def testArraySize(sizes=[0, 5, 50, 1000]):
    bio = BytesIO()
    packer = Packer()
    for size in sizes:
        bio.write(packer.pack_array_header(size))
        for i in range(size):
            bio.write(packer.pack(i))

    bio.seek(0)
    unpacker = Unpacker(bio, use_list=1)
    for size in sizes:
        assert unpacker.unpack() == list(range(size))


def test_manualreset(sizes=[0, 5, 50, 1000]):
    packer = Packer(autoreset=False)
    for size in sizes:
        packer.pack_array_header(size)
        for i in range(size):
            packer.pack(i)

    bio = BytesIO(packer.bytes())
    unpacker = Unpacker(bio, use_list=1)
    for size in sizes:
        assert unpacker.unpack() == list(range(size))

    packer.reset()
    assert packer.bytes() == b""


def testMapSize(sizes=[0, 5, 50, 1000]):
    bio = BytesIO()
    packer = Packer()
    for size in sizes:
        bio.write(packer.pack_map_header(size))
        for i in range(size):
            bio.write(packer.pack(i))  # key
            bio.write(packer.pack(i * 2))  # value

    bio.seek(0)
    unpacker = Unpacker(bio)
    for size in sizes:
        assert unpacker.unpack() == dict((i, i * 2) for i in range(size))


def test_odict():
    seq = [(b"one", 1), (b"two", 2), (b"three", 3), (b"four", 4)]
    od = OrderedDict(seq)
    assert unpackb(packb(od), use_list=1) == dict(seq)

    def pair_hook(seq):
        return list(seq)

    assert unpackb(packb(od), object_pairs_hook=pair_hook, use_list=1) == seq


def test_pairlist():
    pairlist = [(b"a", 1), (2, b"b"), (b"foo", b"bar")]
    packer = Packer()
    packed = packer.pack_map_pairs(pairlist)
    unpacked = unpackb(packed, object_pairs_hook=list)
    assert pairlist == unpacked


def test_get_buffer():
    packer = Packer(autoreset=0, use_bin_type=True)
    packer.pack([1, 2])
    strm = BytesIO()
    strm.write(packer.getbuffer())
    written = strm.getvalue()

    expected = packb([1, 2], use_bin_type=True)
    assert written == expected