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test_obj.py
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#!/usr/bin/env python
# coding: utf-8
from
pytest
import
raises
from
msgpack
import
packb
,
unpackb
def
_decode_complex
(
obj
):
if
b'__complex__'
in
obj
:
return
complex
(
obj
[
b'real'
],
obj
[
b'imag'
])
return
obj
def
_encode_complex
(
obj
):
if
isinstance
(
obj
,
complex
):
return
{
b'__complex__'
:
True
,
b'real'
:
1
,
b'imag'
:
2
}
return
obj
def
test_encode_hook
():
packed
=
packb
([
3
,
1
+
2j
],
default
=
_encode_complex
)
unpacked
=
unpackb
(
packed
,
use_list
=
1
)
assert
unpacked
[
1
]
==
{
b'__complex__'
:
True
,
b'real'
:
1
,
b'imag'
:
2
}
def
test_decode_hook
():
packed
=
packb
([
3
, {
b'__complex__'
:
True
,
b'real'
:
1
,
b'imag'
:
2
}])
unpacked
=
unpackb
(
packed
,
object_hook
=
_decode_complex
,
use_list
=
1
)
assert
unpacked
[
1
]
==
1
+
2j
def
test_decode_pairs_hook
():
packed
=
packb
([
3
, {
1
:
2
,
3
:
4
}])
prod_sum
=
1
*
2
+
3
*
4
unpacked
=
unpackb
(
packed
,
object_pairs_hook
=
lambda
l
:
sum
(
k
*
v
for
k
,
v
in
l
),
use_list
=
1
)
assert
unpacked
[
1
]
==
prod_sum
def
test_only_one_obj_hook
():
with
raises
(
TypeError
):
unpackb
(
b''
,
object_hook
=
lambda
x
:
x
,
object_pairs_hook
=
lambda
x
:
x
)
def
test_bad_hook
():
with
raises
(
TypeError
):
packed
=
packb
([
3
,
1
+
2j
],
default
=
lambda
o
:
o
)
unpacked
=
unpackb
(
packed
,
use_list
=
1
)
def
_arr_to_str
(
arr
):
return
''
.
join
(
str
(
c
)
for
c
in
arr
)
def
test_array_hook
():
packed
=
packb
([
1
,
2
,
3
])
unpacked
=
unpackb
(
packed
,
list_hook
=
_arr_to_str
,
use_list
=
1
)
assert
unpacked
==
'123'
class
DecodeError
(
Exception
):
pass
def
bad_complex_decoder
(
o
):
raise
DecodeError
(
"Ooops!"
)
def
test_an_exception_in_objecthook1
():
with
raises
(
DecodeError
):
packed
=
packb
({
1
: {
'__complex__'
:
True
,
'real'
:
1
,
'imag'
:
2
}})
unpackb
(
packed
,
object_hook
=
bad_complex_decoder
)
def
test_an_exception_in_objecthook2
():
with
raises
(
DecodeError
):
packed
=
packb
({
1
: [{
'__complex__'
:
True
,
'real'
:
1
,
'imag'
:
2
}]})
unpackb
(
packed
,
list_hook
=
bad_complex_decoder
,
use_list
=
1
)
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