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# -*- coding: utf-8 -*-
from __future__ import print_function, absolute_import, division
import io
import math
import pytest
import six
import sys
from functools import partial
from cyson import (
dumps, loads, YsonInt64, YsonUInt64, UInt, Writer, OutputStream,
UnicodeReader,
)
if six.PY2:
NativeUInt = long # noqa: F821
elif six.PY3:
NativeUInt = UInt
unicode = str
long = int
else:
raise RuntimeError('Unsupported Python version')
def canonize(value, as_unicode=False):
_canonize = partial(canonize, as_unicode=as_unicode)
if isinstance(value, (list, tuple)):
return [_canonize(_) for _ in value]
elif isinstance(value, dict):
return {_canonize(k): _canonize(value[k]) for k in value}
elif isinstance(value, unicode) and not as_unicode:
return value.encode('utf8')
elif isinstance(value, bytes) and as_unicode:
return value.decode('utf8')
return value
def switch_string_type(string):
if isinstance(string, bytes):
return string.decode('utf8')
elif isinstance(string, unicode):
return string.encode('utf8')
raise TypeError('expected unicode or bytes, got {!r}'.format(string))
def coerce(obj, to, via=None):
if via is None:
via = to
if isinstance(obj, to):
return obj
return via(obj)
SKIP_PY3 = pytest.mark.skipif(six.PY3, reason='Makes no sense for Python3')
if six.PY3 and sys.platform == 'win32':
NUMPY_CASES = []
else:
import numpy as np
NUMPY_CASES = [
# numpy int
np.int8(2 ** 7 - 1), np.int16(2 ** 15 - 1),
np.int32(2 ** 31 - 1), np.int64(2 ** 63 - 1),
# numpy uint
np.uint8(2 ** 8 - 1), np.uint16(2 ** 16 - 1),
np.uint32(2 ** 32 - 1), np.uint64(2 ** 64 - 1),
# numpy float
np.float16(100.0), np.float32(100.0), np.float64(100.0),
]
CASES = [
# NoneType
None,
# boolean
True, False,
# int
0, 1, -1, int(2 ** 63 - 1), int(-2 ** 63),
# float
0.0, 100.0, -100.0, float('inf'), float('-inf'),
# bytes
b'', b'hello', u'Привет'.encode('utf8'),
# unicode
u'', u'hello', u'Привет',
# list
[], [0], [1, 'hello'], [17, 'q'] * 100, [b'bytes'],
# tuple
(), (0,), (1, 'hello'), (17, 'q') * 100, (b'bytes',),
# dict
{}, {'a': 'b'}, {'a': 17}, {'a': [1, 2, 3]}, {b'a': 1, u'b': b'a'}
] + NUMPY_CASES
@pytest.mark.parametrize('format', ['binary', 'text', 'pretty'])
@pytest.mark.parametrize('value', CASES)
def test_roundtrip(value, format):
encoded = dumps(value, format)
decoded = loads(encoded)
assert encoded == dumps(value, switch_string_type(format))
assert decoded == canonize(value)
# NOTE: roundtrip test doesn't work for NaN (NaN != NaN)
@pytest.mark.parametrize('format', ['binary', 'text', 'pretty'])
def test_nan(format):
encoded = dumps(float('nan'), format)
decoded = loads(encoded)
assert encoded == dumps(float('nan'), switch_string_type(format))
assert math.isnan(decoded)
@SKIP_PY3
@pytest.mark.parametrize('format', ['binary', 'text', 'pretty'])
@pytest.mark.parametrize(
'value', [long(0), long(1), long(2 ** 63), long(2 ** 64 - 1)]
)
def test_long_roundtrip(value, format):
encoded = dumps(value, format)
decoded = loads(encoded)
assert encoded == dumps(value, switch_string_type(format))
assert decoded == value
@pytest.mark.parametrize(
'value', [NativeUInt(0), NativeUInt(111), NativeUInt(2 ** 63), NativeUInt(2 ** 64 - 1)]
)
@pytest.mark.parametrize('format', ['binary', 'text', 'pretty'])
def test_readwrite_uint64(value, format):
dumped_uint64 = dumps(coerce(value, YsonUInt64), format=format)
loaded_uint64 = loads(dumped_uint64)
assert type(value) is NativeUInt
assert type(loaded_uint64) is NativeUInt
assert dumps(value, format=format) == dumped_uint64
@pytest.mark.parametrize('value', [int(-2 ** 63), -111, 0, 111, int(2 ** 63 - 1)])
@pytest.mark.parametrize('format', ['binary', 'text', 'pretty'])
def test_readwrite_int64(value, format):
dumped_int64 = dumps(YsonInt64(value), format=format)
loaded_int64 = loads(dumped_int64)
assert type(value) is int
assert type(loaded_int64) is int
assert dumps(value, format=format) == dumped_int64
@SKIP_PY3
def test_long_overflow():
with pytest.raises(OverflowError):
dumps(long(-1))
with pytest.raises(OverflowError):
dumps(long(2**64))
@pytest.mark.parametrize('value', [2 ** 63, -2 ** 63 - 1])
def test_int64_overflow(value):
with pytest.raises(OverflowError):
int64_value = YsonInt64(value)
dumps(int64_value)
if six.PY3:
with pytest.raises(OverflowError):
dumps(value)
@pytest.mark.parametrize('value', [2 ** 64, 2 ** 100])
def test_uint64_overflow(value):
with pytest.raises(OverflowError):
uint64_value = YsonUInt64(value)
dumps(uint64_value)
@pytest.mark.parametrize('format', ['binary', 'text', 'pretty'])
def test_force_write_sequence(format):
class Sequence(object):
def __init__(self, seq):
self._seq = seq
def __getitem__(self, index):
return self._seq[index]
def __len__(self):
return len(self._seq)
sequence = [1, 1.1, None, b'xyz']
sink = io.BytesIO()
writer = Writer(OutputStream.from_file(sink), format=format)
writer.begin_stream()
writer.list(Sequence(sequence))
writer.end_stream()
assert sink.getvalue() == dumps(sequence, format)
@pytest.mark.parametrize('format', ['binary', 'text', 'pretty'])
def test_force_write_mapping(format):
class Mapping(object):
def __init__(self, mapping):
self._mapping = mapping
def __getitem__(self, key):
return self._mapping[key]
def keys(self):
return self._mapping.keys()
mapping = {b'a': 1, b'b': 1.1, b'c': None, b'd': b'some'}
sink = io.BytesIO()
writer = Writer(OutputStream.from_file(sink), format=format)
writer.begin_stream()
writer.map(Mapping(mapping))
writer.end_stream()
assert sink.getvalue() == dumps(mapping, format)
@pytest.mark.parametrize('format', ['binary', 'text', 'pretty'])
@pytest.mark.parametrize('value', CASES)
def test_unicode_reader(value, format):
expected = canonize(value, as_unicode=True)
got = loads(dumps(value, format), UnicodeReader)
assert expected == got
def test_unicode_reader_raises_unicode_decode_error():
not_decodable = b'\x80\x81'
with pytest.raises(UnicodeDecodeError):
loads(dumps(not_decodable, format='binary'), UnicodeReader)
def test_unicode_reader_decodes_object_with_attributes():
data = b'{"a" = "b"; "c" = <"foo" = "bar">"d"}'
expected = {u"a": u"b", u"c": u"d"}
assert loads(data, UnicodeReader) == expected
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