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R9490 Homework_sp4e_Peruzzo_SáezUribe
test_smart_ptr.py
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import
pytest
from
pybind11_tests
import
smart_ptr
as
m
from
pybind11_tests
import
ConstructorStats
def
test_smart_ptr
(
capture
):
# Object1
for
i
,
o
in
enumerate
([
m
.
make_object_1
(),
m
.
make_object_2
(),
m
.
MyObject1
(
3
)],
start
=
1
):
assert
o
.
getRefCount
()
==
1
with
capture
:
m
.
print_object_1
(
o
)
m
.
print_object_2
(
o
)
m
.
print_object_3
(
o
)
m
.
print_object_4
(
o
)
assert
capture
==
"MyObject1[{i}]
\n
"
.
format
(
i
=
i
)
*
4
for
i
,
o
in
enumerate
([
m
.
make_myobject1_1
(),
m
.
make_myobject1_2
(),
m
.
MyObject1
(
6
),
7
],
start
=
4
):
print
(
o
)
with
capture
:
if
not
isinstance
(
o
,
int
):
m
.
print_object_1
(
o
)
m
.
print_object_2
(
o
)
m
.
print_object_3
(
o
)
m
.
print_object_4
(
o
)
m
.
print_myobject1_1
(
o
)
m
.
print_myobject1_2
(
o
)
m
.
print_myobject1_3
(
o
)
m
.
print_myobject1_4
(
o
)
assert
capture
==
"MyObject1[{i}]
\n
"
.
format
(
i
=
i
)
*
(
4
if
isinstance
(
o
,
int
)
else
8
)
cstats
=
ConstructorStats
.
get
(
m
.
MyObject1
)
assert
cstats
.
alive
()
==
0
expected_values
=
[
'MyObject1[{}]'
.
format
(
i
)
for
i
in
range
(
1
,
7
)]
+
[
'MyObject1[7]'
]
*
4
assert
cstats
.
values
()
==
expected_values
assert
cstats
.
default_constructions
==
0
assert
cstats
.
copy_constructions
==
0
# assert cstats.move_constructions >= 0 # Doesn't invoke any
assert
cstats
.
copy_assignments
==
0
assert
cstats
.
move_assignments
==
0
# Object2
for
i
,
o
in
zip
([
8
,
6
,
7
],
[
m
.
MyObject2
(
8
),
m
.
make_myobject2_1
(),
m
.
make_myobject2_2
()]):
print
(
o
)
with
capture
:
m
.
print_myobject2_1
(
o
)
m
.
print_myobject2_2
(
o
)
m
.
print_myobject2_3
(
o
)
m
.
print_myobject2_4
(
o
)
assert
capture
==
"MyObject2[{i}]
\n
"
.
format
(
i
=
i
)
*
4
cstats
=
ConstructorStats
.
get
(
m
.
MyObject2
)
assert
cstats
.
alive
()
==
1
o
=
None
assert
cstats
.
alive
()
==
0
assert
cstats
.
values
()
==
[
'MyObject2[8]'
,
'MyObject2[6]'
,
'MyObject2[7]'
]
assert
cstats
.
default_constructions
==
0
assert
cstats
.
copy_constructions
==
0
# assert cstats.move_constructions >= 0 # Doesn't invoke any
assert
cstats
.
copy_assignments
==
0
assert
cstats
.
move_assignments
==
0
# Object3
for
i
,
o
in
zip
([
9
,
8
,
9
],
[
m
.
MyObject3
(
9
),
m
.
make_myobject3_1
(),
m
.
make_myobject3_2
()]):
print
(
o
)
with
capture
:
m
.
print_myobject3_1
(
o
)
m
.
print_myobject3_2
(
o
)
m
.
print_myobject3_3
(
o
)
m
.
print_myobject3_4
(
o
)
assert
capture
==
"MyObject3[{i}]
\n
"
.
format
(
i
=
i
)
*
4
cstats
=
ConstructorStats
.
get
(
m
.
MyObject3
)
assert
cstats
.
alive
()
==
1
o
=
None
assert
cstats
.
alive
()
==
0
assert
cstats
.
values
()
==
[
'MyObject3[9]'
,
'MyObject3[8]'
,
'MyObject3[9]'
]
assert
cstats
.
default_constructions
==
0
assert
cstats
.
copy_constructions
==
0
# assert cstats.move_constructions >= 0 # Doesn't invoke any
assert
cstats
.
copy_assignments
==
0
assert
cstats
.
move_assignments
==
0
# Object
cstats
=
ConstructorStats
.
get
(
m
.
Object
)
assert
cstats
.
alive
()
==
0
assert
cstats
.
values
()
==
[]
assert
cstats
.
default_constructions
==
10
assert
cstats
.
copy_constructions
==
0
# assert cstats.move_constructions >= 0 # Doesn't invoke any
assert
cstats
.
copy_assignments
==
0
assert
cstats
.
move_assignments
==
0
# ref<>
cstats
=
m
.
cstats_ref
()
assert
cstats
.
alive
()
==
0
assert
cstats
.
values
()
==
[
'from pointer'
]
*
10
assert
cstats
.
default_constructions
==
30
assert
cstats
.
copy_constructions
==
12
# assert cstats.move_constructions >= 0 # Doesn't invoke any
assert
cstats
.
copy_assignments
==
30
assert
cstats
.
move_assignments
==
0
def
test_smart_ptr_refcounting
():
assert
m
.
test_object1_refcounting
()
def
test_unique_nodelete
():
o
=
m
.
MyObject4
(
23
)
assert
o
.
value
==
23
cstats
=
ConstructorStats
.
get
(
m
.
MyObject4
)
assert
cstats
.
alive
()
==
1
del
o
assert
cstats
.
alive
()
==
1
# Leak, but that's intentional
def
test_unique_nodelete4a
():
o
=
m
.
MyObject4a
(
23
)
assert
o
.
value
==
23
cstats
=
ConstructorStats
.
get
(
m
.
MyObject4a
)
assert
cstats
.
alive
()
==
1
del
o
assert
cstats
.
alive
()
==
1
# Leak, but that's intentional
def
test_unique_deleter
():
o
=
m
.
MyObject4b
(
23
)
assert
o
.
value
==
23
cstats4a
=
ConstructorStats
.
get
(
m
.
MyObject4a
)
assert
cstats4a
.
alive
()
==
2
# Two because of previous test
cstats4b
=
ConstructorStats
.
get
(
m
.
MyObject4b
)
assert
cstats4b
.
alive
()
==
1
del
o
assert
cstats4a
.
alive
()
==
1
# Should now only be one leftover from previous test
assert
cstats4b
.
alive
()
==
0
# Should be deleted
def
test_large_holder
():
o
=
m
.
MyObject5
(
5
)
assert
o
.
value
==
5
cstats
=
ConstructorStats
.
get
(
m
.
MyObject5
)
assert
cstats
.
alive
()
==
1
del
o
assert
cstats
.
alive
()
==
0
def
test_shared_ptr_and_references
():
s
=
m
.
SharedPtrRef
()
stats
=
ConstructorStats
.
get
(
m
.
A
)
assert
stats
.
alive
()
==
2
ref
=
s
.
ref
# init_holder_helper(holder_ptr=false, owned=false)
assert
stats
.
alive
()
==
2
assert
s
.
set_ref
(
ref
)
with
pytest
.
raises
(
RuntimeError
)
as
excinfo
:
assert
s
.
set_holder
(
ref
)
assert
"Unable to cast from non-held to held instance"
in
str
(
excinfo
.
value
)
copy
=
s
.
copy
# init_holder_helper(holder_ptr=false, owned=true)
assert
stats
.
alive
()
==
3
assert
s
.
set_ref
(
copy
)
assert
s
.
set_holder
(
copy
)
holder_ref
=
s
.
holder_ref
# init_holder_helper(holder_ptr=true, owned=false)
assert
stats
.
alive
()
==
3
assert
s
.
set_ref
(
holder_ref
)
assert
s
.
set_holder
(
holder_ref
)
holder_copy
=
s
.
holder_copy
# init_holder_helper(holder_ptr=true, owned=true)
assert
stats
.
alive
()
==
3
assert
s
.
set_ref
(
holder_copy
)
assert
s
.
set_holder
(
holder_copy
)
del
ref
,
copy
,
holder_ref
,
holder_copy
,
s
assert
stats
.
alive
()
==
0
def
test_shared_ptr_from_this_and_references
():
s
=
m
.
SharedFromThisRef
()
stats
=
ConstructorStats
.
get
(
m
.
B
)
assert
stats
.
alive
()
==
2
ref
=
s
.
ref
# init_holder_helper(holder_ptr=false, owned=false, bad_wp=false)
assert
stats
.
alive
()
==
2
assert
s
.
set_ref
(
ref
)
assert
s
.
set_holder
(
ref
)
# std::enable_shared_from_this can create a holder from a reference
bad_wp
=
s
.
bad_wp
# init_holder_helper(holder_ptr=false, owned=false, bad_wp=true)
assert
stats
.
alive
()
==
2
assert
s
.
set_ref
(
bad_wp
)
with
pytest
.
raises
(
RuntimeError
)
as
excinfo
:
assert
s
.
set_holder
(
bad_wp
)
assert
"Unable to cast from non-held to held instance"
in
str
(
excinfo
.
value
)
copy
=
s
.
copy
# init_holder_helper(holder_ptr=false, owned=true, bad_wp=false)
assert
stats
.
alive
()
==
3
assert
s
.
set_ref
(
copy
)
assert
s
.
set_holder
(
copy
)
holder_ref
=
s
.
holder_ref
# init_holder_helper(holder_ptr=true, owned=false, bad_wp=false)
assert
stats
.
alive
()
==
3
assert
s
.
set_ref
(
holder_ref
)
assert
s
.
set_holder
(
holder_ref
)
holder_copy
=
s
.
holder_copy
# init_holder_helper(holder_ptr=true, owned=true, bad_wp=false)
assert
stats
.
alive
()
==
3
assert
s
.
set_ref
(
holder_copy
)
assert
s
.
set_holder
(
holder_copy
)
del
ref
,
bad_wp
,
copy
,
holder_ref
,
holder_copy
,
s
assert
stats
.
alive
()
==
0
z
=
m
.
SharedFromThisVirt
.
get
()
y
=
m
.
SharedFromThisVirt
.
get
()
assert
y
is
z
def
test_move_only_holder
():
a
=
m
.
TypeWithMoveOnlyHolder
.
make
()
stats
=
ConstructorStats
.
get
(
m
.
TypeWithMoveOnlyHolder
)
assert
stats
.
alive
()
==
1
del
a
assert
stats
.
alive
()
==
0
def
test_holder_with_addressof_operator
():
# this test must not throw exception from c++
a
=
m
.
TypeForHolderWithAddressOf
.
make
()
a
.
print_object_1
()
a
.
print_object_2
()
a
.
print_object_3
()
a
.
print_object_4
()
stats
=
ConstructorStats
.
get
(
m
.
TypeForHolderWithAddressOf
)
assert
stats
.
alive
()
==
1
np
=
m
.
TypeForHolderWithAddressOf
.
make
()
assert
stats
.
alive
()
==
2
del
a
assert
stats
.
alive
()
==
1
del
np
assert
stats
.
alive
()
==
0
b
=
m
.
TypeForHolderWithAddressOf
.
make
()
c
=
b
assert
b
.
get
()
is
c
.
get
()
assert
stats
.
alive
()
==
1
del
b
assert
stats
.
alive
()
==
1
del
c
assert
stats
.
alive
()
==
0
def
test_move_only_holder_with_addressof_operator
():
a
=
m
.
TypeForMoveOnlyHolderWithAddressOf
.
make
()
a
.
print_object
()
stats
=
ConstructorStats
.
get
(
m
.
TypeForMoveOnlyHolderWithAddressOf
)
assert
stats
.
alive
()
==
1
a
.
value
=
42
assert
a
.
value
==
42
del
a
assert
stats
.
alive
()
==
0
def
test_smart_ptr_from_default
():
instance
=
m
.
HeldByDefaultHolder
()
with
pytest
.
raises
(
RuntimeError
)
as
excinfo
:
m
.
HeldByDefaultHolder
.
load_shared_ptr
(
instance
)
assert
"Unable to load a custom holder type from a "
\
"default-holder instance"
in
str
(
excinfo
.
value
)
def
test_shared_ptr_gc
():
"""#187: issue involving std::shared_ptr<> return value policy & garbage collection"""
el
=
m
.
ElementList
()
for
i
in
range
(
10
):
el
.
add
(
m
.
ElementA
(
i
))
pytest
.
gc_collect
()
for
i
,
v
in
enumerate
(
el
.
get
()):
assert
i
==
v
.
value
()
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