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# coding: utf-8
from __future__ import (
absolute_import, division, print_function, unicode_literals)
import pytest
from pandas.io.msgpack import ExtType, Packer, Unpacker, packb, unpackb
class TestLimits(object):
def test_integer(self):
x = -(2 ** 63)
assert unpackb(packb(x)) == x
msg = (r"((long |Python )?(int )?too (big|large) to convert"
r"( to C (unsigned )?long))?")
with pytest.raises((OverflowError, ValueError), match=msg):
packb(x - 1)
x = 2 ** 64 - 1
assert unpackb(packb(x)) == x
with pytest.raises((OverflowError, ValueError), match=msg):
packb(x + 1)
def test_array_header(self):
packer = Packer()
packer.pack_array_header(2 ** 32 - 1)
with pytest.raises((OverflowError, ValueError)):
packer.pack_array_header(2 ** 32)
def test_map_header(self):
packer = Packer()
packer.pack_map_header(2 ** 32 - 1)
with pytest.raises((OverflowError, ValueError)):
packer.pack_array_header(2 ** 32)
def test_max_str_len(self):
d = 'x' * 3
packed = packb(d)
unpacker = Unpacker(max_str_len=3, encoding='utf-8')
unpacker.feed(packed)
assert unpacker.unpack() == d
unpacker = Unpacker(max_str_len=2, encoding='utf-8')
unpacker.feed(packed)
msg = "3 exceeds max_str_len"
with pytest.raises(ValueError, match=msg):
unpacker.unpack()
def test_max_bin_len(self):
d = b'x' * 3
packed = packb(d, use_bin_type=True)
unpacker = Unpacker(max_bin_len=3)
unpacker.feed(packed)
assert unpacker.unpack() == d
unpacker = Unpacker(max_bin_len=2)
unpacker.feed(packed)
msg = "3 exceeds max_bin_len"
with pytest.raises(ValueError, match=msg):
unpacker.unpack()
def test_max_array_len(self):
d = [1, 2, 3]
packed = packb(d)
unpacker = Unpacker(max_array_len=3)
unpacker.feed(packed)
assert unpacker.unpack() == d
unpacker = Unpacker(max_array_len=2)
unpacker.feed(packed)
msg = "3 exceeds max_array_len"
with pytest.raises(ValueError, match=msg):
unpacker.unpack()
def test_max_map_len(self):
d = {1: 2, 3: 4, 5: 6}
packed = packb(d)
unpacker = Unpacker(max_map_len=3)
unpacker.feed(packed)
assert unpacker.unpack() == d
unpacker = Unpacker(max_map_len=2)
unpacker.feed(packed)
msg = "3 exceeds max_map_len"
with pytest.raises(ValueError, match=msg):
unpacker.unpack()
def test_max_ext_len(self):
d = ExtType(42, b"abc")
packed = packb(d)
unpacker = Unpacker(max_ext_len=3)
unpacker.feed(packed)
assert unpacker.unpack() == d
unpacker = Unpacker(max_ext_len=2)
unpacker.feed(packed)
msg = "4 exceeds max_ext_len"
with pytest.raises(ValueError, match=msg):
unpacker.unpack()
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