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from io import BytesIO
import sys
from msgpack import Unpacker, packb, OutOfData, ExtType
from pytest import raises, mark
def test_unpack_array_header_from_file():
f = BytesIO(packb([1,2,3,4]))
unpacker = Unpacker(f)
assert unpacker.read_array_header() == 4
assert unpacker.unpack() == 1
assert unpacker.unpack() == 2
assert unpacker.unpack() == 3
assert unpacker.unpack() == 4
with raises(OutOfData):
unpacker.unpack()
@mark.skipif("not hasattr(sys, 'getrefcount') == True",
reason='sys.getrefcount() is needed to pass this test')
def test_unpacker_hook_refcnt():
result = []
def hook(x):
result.append(x)
return x
basecnt = sys.getrefcount(hook)
up = Unpacker(object_hook=hook, list_hook=hook)
assert sys.getrefcount(hook) >= basecnt + 2
up.feed(packb([{}]))
up.feed(packb([{}]))
assert up.unpack() == [{}]
assert up.unpack() == [{}]
assert result == [{}, [{}], {}, [{}]]
del up
assert sys.getrefcount(hook) == basecnt
def test_unpacker_ext_hook():
class MyUnpacker(Unpacker):
def __init__(self):
super(MyUnpacker, self).__init__(ext_hook=self._hook,
encoding='utf-8')
def _hook(self, code, data):
if code == 1:
return int(data)
else:
return ExtType(code, data)
unpacker = MyUnpacker()
unpacker.feed(packb({'a': 1}, encoding='utf-8'))
assert unpacker.unpack() == {'a': 1}
unpacker.feed(packb({'a': ExtType(1, b'123')}, encoding='utf-8'))
assert unpacker.unpack() == {'a': 123}
unpacker.feed(packb({'a': ExtType(2, b'321')}, encoding='utf-8'))
assert unpacker.unpack() == {'a': ExtType(2, b'321')}
if __name__ == '__main__':
test_unpack_array_header_from_file()
test_unpacker_hook_refcnt()
test_unpacker_ext_hook()
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