def test_to_python():
mat = m.Matrix(5, 5)
assert memoryview(mat).shape == (5, 5)
assert mat[2, 3] == 0
mat[2, 3] = 4
assert mat[2, 3] == 4
mat2 = np.array(mat, copy=False)
assert mat2.shape == (5, 5)
assert abs(mat2).sum() == 4
assert mat2[2, 3] == 4
mat2[2, 3] = 5
assert mat2[2, 3] == 5
cstats = ConstructorStats.get(m.Matrix)
assert cstats.alive() == 1
del mat
pytest.gc_collect()
assert cstats.alive() == 1
del mat2 # holds a mat reference
pytest.gc_collect()
assert cstats.alive() == 0
assert cstats.values() == ["5x5 matrix"]
assert cstats.copy_constructions == 0
# assert cstats.move_constructions >= 0 # Don't invoke any
assert cstats.copy_assignments == 0
assert cstats.move_assignments == 0
def test_alias_delay_initialization1(capture):
"""
A only initializes its trampoline class when we inherit from it; if we just
create and use an A instance directly, the trampoline initialization is
bypassed and we only initialize an A() instead (for performance reasons).
"""
from pybind11_tests import A, call_f
class B(A):
def __init__(self):
super(B, self).__init__()
def f(self):
print("In python f()")
# C++ version
with capture:
a = A()
call_f(a)
del a
pytest.gc_collect()
assert capture == "A.f()"
# Python version
with capture:
b = B()
call_f(b)
del b
pytest.gc_collect()
assert capture == """
def test_alias_delay_initialization2(capture):
"""A2, unlike the above, is configured to always initialize the alias; while
the extra initialization and extra class layer has small virtual dispatch
performance penalty, it also allows us to do more things with the trampoline
class such as defining local variables and performing construction/destruction.
"""
from pybind11_tests import A2, call_f
class B2(A2):
def __init__(self):
super(B2, self).__init__()
def f(self):
print("In python B2.f()")
# No python subclass version
with capture:
a2 = A2()
call_f(a2)
del a2
pytest.gc_collect()
assert capture == """
PyA2.PyA2()
PyA2.f()
A2.f()
PyA2.~PyA2()
"""
# Python subclass version
with capture:
b2 = B2()
call_f(b2)
del b2
pytest.gc_collect()
assert capture == """
def test_alias_delay_initialization1(capture):
"""`A` only initializes its trampoline class when we inherit from it
If we just create and use an A instance directly, the trampoline initialization is
bypassed and we only initialize an A() instead (for performance reasons).
"""
class B(m.A):
def __init__(self):
super(B, self).__init__()
def f(self):
print("In python f()")
# C++ version
with capture:
a = m.A()
m.call_f(a)
del a
pytest.gc_collect()
assert capture == "A.f()"
# Python version
with capture:
b = B()
m.call_f(b)
del b
pytest.gc_collect()
assert capture == """
def test_no_placement_new(capture):
"""Prior to 2.2, `py::init<...>` relied on the type supporting placement
new; this tests a class without placement new support."""
with capture:
a = m.NoPlacementNew(123)
found = re.search(r'^operator new called, returning (\d+)\n$',
str(capture))
assert found
assert a.i == 123
with capture:
del a
pytest.gc_collect()
assert capture == "operator delete called on " + found.group(1)
with capture:
b = m.NoPlacementNew()
found = re.search(r'^operator new called, returning (\d+)\n$',
str(capture))
assert found
assert b.i == 100
with capture:
del b
pytest.gc_collect()
assert capture == "operator delete called on " + found.group(1)
def test_alias_delay_initialization1(capture):
"""`A` only initializes its trampoline class when we inherit from it
If we just create and use an A instance directly, the trampoline initialization is
bypassed and we only initialize an A() instead (for performance reasons).
"""
class B(m.A):
def __init__(self):
super(B, self).__init__()
def f(self):
print("In python f()")
# C++ version
with capture:
a = m.A()
m.call_f(a)
del a
pytest.gc_collect()
assert capture == "A.f()"
# Python version
with capture:
b = B()
m.call_f(b)
del b
pytest.gc_collect()
assert (capture == """
PyA.PyA()
PyA.f()
In python f()
PyA.~PyA()
""")
def test_to_python():
mat = m.Matrix(5, 5)
assert memoryview(mat).shape == (5, 5)
assert mat[2, 3] == 0
mat[2, 3] = 4
assert mat[2, 3] == 4
mat2 = np.array(mat, copy=False)
assert mat2.shape == (5, 5)
assert abs(mat2).sum() == 4
assert mat2[2, 3] == 4
mat2[2, 3] = 5
assert mat2[2, 3] == 5
cstats = ConstructorStats.get(m.Matrix)
assert cstats.alive() == 1
del mat
pytest.gc_collect()
assert cstats.alive() == 1
del mat2 # holds a mat reference
pytest.gc_collect()
assert cstats.alive() == 0
assert cstats.values() == ["5x5 matrix"]
assert cstats.copy_constructions == 0
# assert cstats.move_constructions >= 0 # Don't invoke any
assert cstats.copy_assignments == 0
assert cstats.move_assignments == 0
def test_to_python():
m = Matrix(5, 5)
assert m[2, 3] == 0
m[2, 3] = 4
assert m[2, 3] == 4
m2 = np.array(m, copy=False)
assert m2.shape == (5, 5)
assert abs(m2).sum() == 4
assert m2[2, 3] == 4
m2[2, 3] = 5
assert m2[2, 3] == 5
cstats = ConstructorStats.get(Matrix)
assert cstats.alive() == 1
del m
pytest.gc_collect()
assert cstats.alive() == 1
del m2 # holds an m reference
pytest.gc_collect()
assert cstats.alive() == 0
assert cstats.values() == ["5x5 matrix"]
assert cstats.copy_constructions == 0
# assert cstats.move_constructions >= 0 # Don't invoke any
assert cstats.copy_assignments == 0
assert cstats.move_assignments == 0
def test_to_python():
mat = m.Matrix(5, 4)
assert memoryview(mat).shape == (5, 4)
assert mat[2, 3] == 0
mat[2, 3] = 4.0
mat[3, 2] = 7.0
assert mat[2, 3] == 4
assert mat[3, 2] == 7
assert struct.unpack_from("f", mat, (3 * 4 + 2) * 4) == (7, )
assert struct.unpack_from("f", mat, (2 * 4 + 3) * 4) == (4, )
mat2 = np.array(mat, copy=False)
assert mat2.shape == (5, 4)
assert abs(mat2).sum() == 11
assert mat2[2, 3] == 4 and mat2[3, 2] == 7
mat2[2, 3] = 5
assert mat2[2, 3] == 5
cstats = ConstructorStats.get(m.Matrix)
assert cstats.alive() == 1
del mat
pytest.gc_collect()
assert cstats.alive() == 1
del mat2 # holds a mat reference
pytest.gc_collect()
assert cstats.alive() == 0
assert cstats.values() == ["5x4 matrix"]
assert cstats.copy_constructions == 0
# assert cstats.move_constructions >= 0 # Don't invoke any
assert cstats.copy_assignments == 0
assert cstats.move_assignments == 0
def test_weakref(create_weakref, create_weakref_with_callback):
from weakref import getweakrefcount
# Apparently, you cannot weakly reference an object()
class WeaklyReferenced(object):
pass
def callback(wr):
# No `nonlocal` in Python 2
callback.called = True
obj = WeaklyReferenced()
assert getweakrefcount(obj) == 0
wr = create_weakref(obj)
assert getweakrefcount(obj) == 1
obj = WeaklyReferenced()
assert getweakrefcount(obj) == 0
callback.called = False
wr = create_weakref_with_callback(obj, callback) # noqa: F841
assert getweakrefcount(obj) == 1
assert not callback.called
del obj
pytest.gc_collect()
assert callback.called
def test_alias_delay_initialization2(capture):
"""A2, unlike the above, is configured to always initialize the alias; while
the extra initialization and extra class layer has small virtual dispatch
performance penalty, it also allows us to do more things with the trampoline
class such as defining local variables and performing construction/destruction.
"""
from pybind11_tests import A2, call_f
class B2(A2):
def __init__(self):
super(B2, self).__init__()
def f(self):
print("In python B2.f()")
# No python subclass version
with capture:
a2 = A2()
call_f(a2)
del a2
pytest.gc_collect()
assert capture == """
PyA2.PyA2()
PyA2.f()
A2.f()
PyA2.~PyA2()
"""
# Python subclass version
with capture:
b2 = B2()
call_f(b2)
del b2
pytest.gc_collect()
assert capture == """
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()
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()
def test_str_leak():
from sys import getrefcount
fmt = "f4"
pytest.gc_collect()
start = getrefcount(fmt)
d = m.dtype_wrapper(fmt)
assert d is np.dtype("f4")
del d
pytest.gc_collect()
assert getrefcount(fmt) == start
def test_shared_ptr_gc():
"""// #187: issue involving std::shared_ptr<> return value policy & garbage collection"""
from pybind11_tests.issues import ElementList, ElementA
el = ElementList()
for i in range(10):
el.add(ElementA(i))
pytest.gc_collect()
for i, v in enumerate(el.get()):
assert i == v.value()
def test_shared_ptr_gc():
"""#187: issue involving std::shared_ptr<> return value policy & garbage collection"""
from pybind11_tests.smart_ptr import ElementList, ElementA
el = ElementList()
for i in range(10):
el.add(ElementA(i))
pytest.gc_collect()
for i, v in enumerate(el.get()):
assert i == v.value()
def test_str_leak():
from sys import getrefcount
fmt = "f4"
pytest.gc_collect()
start = getrefcount(fmt)
d = m.dtype_wrapper(fmt)
assert d is np.dtype("f4")
del d
pytest.gc_collect()
assert getrefcount(fmt) == start
def test_reallocation_a(capture, msg):
"""When the constructor is overloaded, previous overloads can require a preallocated value.
This test makes sure that such preallocated values only happen when they might be necessary,
and that they are deallocated properly."""
pytest.gc_collect()
with capture:
create_and_destroy(1)
assert msg(capture) == """
def test_capsule(capture):
pytest.gc_collect()
with capture:
a = m.return_capsule_with_destructor()
del a
pytest.gc_collect()
assert capture.unordered == """
creating capsule
destructing capsule
"""
with capture:
a = m.return_capsule_with_destructor_2()
del a
pytest.gc_collect()
assert capture.unordered == """
creating capsule
destructing capsule: 1234
"""
with capture:
a = m.return_capsule_with_name_and_destructor()
del a
pytest.gc_collect()
assert capture.unordered == """
def test_capsule(capture):
pytest.gc_collect()
with capture:
a = m.return_capsule_with_destructor()
del a
pytest.gc_collect()
assert capture.unordered == """
creating capsule
destructing capsule
"""
with capture:
a = m.return_capsule_with_destructor_2()
del a
pytest.gc_collect()
assert capture.unordered == """
creating capsule
destructing capsule: 1234
"""
with capture:
a = m.return_capsule_with_name_and_destructor()
del a
pytest.gc_collect()
assert capture.unordered == """
def test_keep_alive_return_value(capture):
from pybind11_tests import Parent
with capture:
p = Parent()
assert capture == "Allocating parent."
with capture:
p.returnChild()
pytest.gc_collect()
assert capture == """
Allocating child.
Releasing child.
"""
with capture:
del p
pytest.gc_collect()
assert capture == "Releasing parent."
with capture:
p = Parent()
assert capture == "Allocating parent."
with capture:
p.returnChildKeepAlive()
pytest.gc_collect()
assert capture == "Allocating child."
with capture:
del p
pytest.gc_collect()
assert capture == """
def test_return_none(capture):
from pybind11_tests import Parent
with capture:
p = Parent()
if capture != "Allocating parent.":
raise AssertionError
with capture:
p.returnNullChildKeepAliveChild()
pytest.gc_collect()
if capture != "":
raise AssertionError
with capture:
del p
pytest.gc_collect()
if capture != "Releasing parent.":
raise AssertionError
with capture:
p = Parent()
if capture != "Allocating parent.":
raise AssertionError
with capture:
p.returnNullChildKeepAliveParent()
pytest.gc_collect()
if capture != "":
raise AssertionError
with capture:
del p
pytest.gc_collect()
if capture != "Releasing parent.":
raise AssertionError
def test_return_none(capture):
from pybind11_tests import Parent
with capture:
p = Parent()
assert capture == "Allocating parent."
with capture:
p.returnNullChildKeepAliveChild()
pytest.gc_collect()
assert capture == ""
with capture:
del p
pytest.gc_collect()
assert capture == "Releasing parent."
with capture:
p = Parent()
assert capture == "Allocating parent."
with capture:
p.returnNullChildKeepAliveParent()
pytest.gc_collect()
assert capture == ""
with capture:
del p
pytest.gc_collect()
assert capture == "Releasing parent."
def test_capsule(capture):
pytest.gc_collect()
with capture:
a = m.return_capsule_with_destructor()
del a
pytest.gc_collect()
assert (capture.unordered == """
creating capsule
destructing capsule
""")
with capture:
a = m.return_capsule_with_destructor_2()
del a
pytest.gc_collect()
assert (capture.unordered == """
creating capsule
destructing capsule: 1234
""")
with capture:
a = m.return_capsule_with_name_and_destructor()
del a
pytest.gc_collect()
assert (capture.unordered == """
created capsule (1234, 'pointer type description')
destructing capsule (1234, 'pointer type description')
""")
def test_keep_alive_argument(capture):
from pybind11_tests import Parent, Child
with capture:
p = Parent()
assert capture == "Allocating parent."
with capture:
p.addChild(Child())
pytest.gc_collect()
assert capture == """
Allocating child.
Releasing child.
"""
with capture:
del p
pytest.gc_collect()
assert capture == "Releasing parent."
with capture:
p = Parent()
assert capture == "Allocating parent."
with capture:
p.addChildKeepAlive(Child())
pytest.gc_collect()
assert capture == "Allocating child."
with capture:
del p
pytest.gc_collect()
assert capture == """
def test_capsule_with_destructor(capture):
import pybind11_tests as m
with capture:
a = m.return_capsule_with_destructor()
del a
pytest.gc_collect()
assert capture.unordered == """
creating capsule
destructing capsule
"""
with capture:
a = m.return_capsule_with_destructor_2()
del a
pytest.gc_collect()
assert capture.unordered == """
def test_operator_new_delete(capture):
"""Tests that class-specific operator new/delete functions are invoked"""
class SubAliased(m.AliasedHasOpNewDelSize):
pass
with capture:
a = m.HasOpNewDel()
b = m.HasOpNewDelSize()
d = m.HasOpNewDelBoth()
assert capture == """
A new 8
B new 4
D new 32
"""
sz_alias = str(m.AliasedHasOpNewDelSize.size_alias)
sz_noalias = str(m.AliasedHasOpNewDelSize.size_noalias)
with capture:
c = m.AliasedHasOpNewDelSize()
c2 = SubAliased()
assert capture == (
"C new " + sz_noalias + "\n" +
"C new " + sz_alias + "\n"
)
with capture:
del a
pytest.gc_collect()
del b
pytest.gc_collect()
del d
pytest.gc_collect()
assert capture == """
A delete
B delete 4
D delete
"""
with capture:
del c
pytest.gc_collect()
del c2
pytest.gc_collect()
assert capture == (
"C delete " + sz_noalias + "\n" +
"C delete " + sz_alias + "\n"
)
def test_operator_new_delete(capture):
"""Tests that class-specific operator new/delete functions are invoked"""
class SubAliased(m.AliasedHasOpNewDelSize):
pass
with capture:
a = m.HasOpNewDel()
b = m.HasOpNewDelSize()
d = m.HasOpNewDelBoth()
assert (
capture
== """
A new 8
B new 4
D new 32
"""
)
sz_alias = str(m.AliasedHasOpNewDelSize.size_alias)
sz_noalias = str(m.AliasedHasOpNewDelSize.size_noalias)
with capture:
c = m.AliasedHasOpNewDelSize()
c2 = SubAliased()
assert capture == ("C new " + sz_noalias + "\n" + "C new " + sz_alias + "\n")
with capture:
del a
pytest.gc_collect()
del b
pytest.gc_collect()
del d
pytest.gc_collect()
assert (
capture
== """
A delete
B delete 4
D delete
"""
)
with capture:
del c
pytest.gc_collect()
del c2
pytest.gc_collect()
assert capture == ("C delete " + sz_noalias + "\n" + "C delete " + sz_alias + "\n")
def test_class_refcount():
"""Instances must correctly increase/decrease the reference count of their types (#1029)"""
from sys import getrefcount
class PyDog(m.Dog):
pass
for cls in m.Dog, PyDog:
refcount_1 = getrefcount(cls)
molly = [cls("Molly") for _ in range(10)]
refcount_2 = getrefcount(cls)
del molly
pytest.gc_collect()
refcount_3 = getrefcount(cls)
assert refcount_1 == refcount_3
assert refcount_2 > refcount_1
def test_class_refcount():
"""Instances must correctly increase/decrease the reference count of their types (#1029)"""
from sys import getrefcount
class PyDog(m.Dog):
pass
for cls in m.Dog, PyDog:
refcount_1 = getrefcount(cls)
molly = [cls("Molly") for _ in range(10)]
refcount_2 = getrefcount(cls)
del molly
pytest.gc_collect()
refcount_3 = getrefcount(cls)
assert refcount_1 == refcount_3
assert refcount_2 > refcount_1
def test_to_python():
m = Matrix(5, 5)
if m[2, 3] != 0:
raise AssertionError
m[2, 3] = 4
if m[2, 3] != 4:
raise AssertionError
m2 = np.array(m, copy=False)
if m2.shape != (5, 5):
raise AssertionError
if abs(m2).sum() != 4:
raise AssertionError
if m2[2, 3] != 4:
raise AssertionError
m2[2, 3] = 5
if m2[2, 3] != 5:
raise AssertionError
cstats = ConstructorStats.get(Matrix)
if cstats.alive() != 1:
raise AssertionError
del m
pytest.gc_collect()
if cstats.alive() != 1:
raise AssertionError
del m2 # holds an m reference
pytest.gc_collect()
if cstats.alive() != 0:
raise AssertionError
if cstats.values() != ["5x5 matrix"]:
raise AssertionError
if cstats.copy_constructions != 0:
raise AssertionError
# assert cstats.move_constructions >= 0 # Don't invoke any
if cstats.copy_assignments != 0:
raise AssertionError
if cstats.move_assignments != 0:
raise AssertionError
def test_numpy_view(capture):
with capture:
ac = m.ArrayClass()
ac_view_1 = ac.numpy_view()
ac_view_2 = ac.numpy_view()
assert np.all(ac_view_1 == np.array([1, 2], dtype=np.int32))
del ac
pytest.gc_collect()
assert (capture == """
ArrayClass()
ArrayClass::numpy_view()
ArrayClass::numpy_view()
""")
ac_view_1[0] = 4
ac_view_1[1] = 3
assert ac_view_2[0] == 4
assert ac_view_2[1] == 3
with capture:
del ac_view_1
del ac_view_2
pytest.gc_collect()
pytest.gc_collect()
assert (capture == """
~ArrayClass()
""")
def test_numpy_view(capture):
from pybind11_tests.array import ArrayClass
with capture:
ac = ArrayClass()
ac_view_1 = ac.numpy_view()
ac_view_2 = ac.numpy_view()
assert np.all(ac_view_1 == np.array([1, 2], dtype=np.int32))
del ac
pytest.gc_collect()
assert (
capture
== """
ArrayClass()
ArrayClass::numpy_view()
ArrayClass::numpy_view()
"""
)
ac_view_1[0] = 4
ac_view_1[1] = 3
assert ac_view_2[0] == 4
assert ac_view_2[1] == 3
with capture:
del ac_view_1
del ac_view_2
pytest.gc_collect()
pytest.gc_collect()
assert (
capture
== """
~ArrayClass()
"""
)
def test_numpy_view(capture):
from pybind11_tests.array import ArrayClass
with capture:
ac = ArrayClass()
ac_view_1 = ac.numpy_view()
ac_view_2 = ac.numpy_view()
if not np.all(ac_view_1 == np.array([1, 2], dtype=np.int32)):
raise AssertionError
del ac
pytest.gc_collect()
if capture != """
ArrayClass()
ArrayClass::numpy_view()
ArrayClass::numpy_view()
""":
raise AssertionError
ac_view_1[0] = 4
ac_view_1[1] = 3
if ac_view_2[0] != 4:
raise AssertionError
if ac_view_2[1] != 3:
raise AssertionError
with capture:
del ac_view_1
del ac_view_2
pytest.gc_collect()
pytest.gc_collect()
if capture != """
~ArrayClass()
""":
raise AssertionError
def test_no_placement_new(capture):
"""Prior to 2.2, `py::init<...>` relied on the type supporting placement
new; this tests a class without placement new support."""
with capture:
a = m.NoPlacementNew(123)
found = re.search(r'^operator new called, returning (\d+)\n$', str(capture))
assert found
assert a.i == 123
with capture:
del a
pytest.gc_collect()
assert capture == "operator delete called on " + found.group(1)
with capture:
b = m.NoPlacementNew()
found = re.search(r'^operator new called, returning (\d+)\n$', str(capture))
assert found
assert b.i == 100
with capture:
del b
pytest.gc_collect()
assert capture == "operator delete called on " + found.group(1)
def test_nested():
""" #328: first member in a class can't be used in operators"""
from pybind11_tests.issues import NestA, NestB, NestC, get_NestA, get_NestB, get_NestC
a = NestA()
b = NestB()
c = NestC()
a += 10
if get_NestA(a) != 13:
raise AssertionError
b.a += 100
if get_NestA(b.a) != 103:
raise AssertionError
c.b.a += 1000
if get_NestA(c.b.a) != 1003:
raise AssertionError
b -= 1
if get_NestB(b) != 3:
raise AssertionError
c.b -= 3
if get_NestB(c.b) != 1:
raise AssertionError
c *= 7
if get_NestC(c) != 35:
raise AssertionError
abase = a.as_base()
if abase.value != -2:
raise AssertionError
a.as_base().value += 44
if abase.value != 42:
raise AssertionError
if c.b.a.as_base().value != -2:
raise AssertionError
c.b.a.as_base().value += 44
if c.b.a.as_base().value != 42:
raise AssertionError
del c
pytest.gc_collect()
del a # Should't delete while abase is still alive
pytest.gc_collect()
if abase.value != 42:
raise AssertionError
del abase, b
pytest.gc_collect()
def test_keep_alive_argument(capture):
from pybind11_tests import Parent, Child
with capture:
p = Parent()
if capture != "Allocating parent.":
raise AssertionError
with capture:
p.addChild(Child())
pytest.gc_collect()
if capture != """
Allocating child.
Releasing child.
""":
raise AssertionError
with capture:
del p
pytest.gc_collect()
if capture != "Releasing parent.":
raise AssertionError
with capture:
p = Parent()
if capture != "Allocating parent.":
raise AssertionError
with capture:
p.addChildKeepAlive(Child())
pytest.gc_collect()
if capture != "Allocating child.":
raise AssertionError
with capture:
del p
pytest.gc_collect()
if capture != """
Releasing parent.
Releasing child.
""":
raise AssertionError
def test_keep_alive_return_value(capture):
from pybind11_tests import Parent
with capture:
p = Parent()
if capture != "Allocating parent.":
raise AssertionError
with capture:
p.returnChild()
pytest.gc_collect()
if capture != """
Allocating child.
Releasing child.
""":
raise AssertionError
with capture:
del p
pytest.gc_collect()
if capture != "Releasing parent.":
raise AssertionError
with capture:
p = Parent()
if capture != "Allocating parent.":
raise AssertionError
with capture:
p.returnChildKeepAlive()
pytest.gc_collect()
if capture != "Allocating child.":
raise AssertionError
with capture:
del p
pytest.gc_collect()
if capture != """
Releasing parent.
Releasing child.
""":
raise AssertionError
def test_numpy_view(capture):
with capture:
ac = m.ArrayClass()
ac_view_1 = ac.numpy_view()
ac_view_2 = ac.numpy_view()
assert np.all(ac_view_1 == np.array([1, 2], dtype=np.int32))
del ac
pytest.gc_collect()
assert capture == """
ArrayClass()
ArrayClass::numpy_view()
ArrayClass::numpy_view()
"""
ac_view_1[0] = 4
ac_view_1[1] = 3
assert ac_view_2[0] == 4
assert ac_view_2[1] == 3
with capture:
del ac_view_1
del ac_view_2
pytest.gc_collect()
pytest.gc_collect()
assert capture == """
def test_nested():
"""#328: first member in a class can't be used in operators"""
from pybind11_tests.operators import NestA, NestB, NestC, get_NestA, get_NestB, get_NestC
a = NestA()
b = NestB()
c = NestC()
a += 10
assert get_NestA(a) == 13
b.a += 100
assert get_NestA(b.a) == 103
c.b.a += 1000
assert get_NestA(c.b.a) == 1003
b -= 1
assert get_NestB(b) == 3
c.b -= 3
assert get_NestB(c.b) == 1
c *= 7
assert get_NestC(c) == 35
abase = a.as_base()
assert abase.value == -2
a.as_base().value += 44
assert abase.value == 42
assert c.b.a.as_base().value == -2
c.b.a.as_base().value += 44
assert c.b.a.as_base().value == 42
del c
pytest.gc_collect()
del a # Should't delete while abase is still alive
pytest.gc_collect()
assert abase.value == 42
del abase, b
pytest.gc_collect()
def test_nested():
""" #328: first member in a class can't be used in operators"""
from pybind11_tests.issues import NestA, NestB, NestC, get_NestA, get_NestB, get_NestC
a = NestA()
b = NestB()
c = NestC()
a += 10
assert get_NestA(a) == 13
b.a += 100
assert get_NestA(b.a) == 103
c.b.a += 1000
assert get_NestA(c.b.a) == 1003
b -= 1
assert get_NestB(b) == 3
c.b -= 3
assert get_NestB(c.b) == 1
c *= 7
assert get_NestC(c) == 35
abase = a.as_base()
assert abase.value == -2
a.as_base().value += 44
assert abase.value == 42
assert c.b.a.as_base().value == -2
c.b.a.as_base().value += 44
assert c.b.a.as_base().value == 42
del c
pytest.gc_collect()
del a # Should't delete while abase is still alive
pytest.gc_collect()
assert abase.value == 42
del abase, b
pytest.gc_collect()
def test_nested():
"""#328: first member in a class can't be used in operators"""
a = m.NestA()
b = m.NestB()
c = m.NestC()
a += 10
assert m.get_NestA(a) == 13
b.a += 100
assert m.get_NestA(b.a) == 103
c.b.a += 1000
assert m.get_NestA(c.b.a) == 1003
b -= 1
assert m.get_NestB(b) == 3
c.b -= 3
assert m.get_NestB(c.b) == 1
c *= 7
assert m.get_NestC(c) == 35
abase = a.as_base()
assert abase.value == -2
a.as_base().value += 44
assert abase.value == 42
assert c.b.a.as_base().value == -2
c.b.a.as_base().value += 44
assert c.b.a.as_base().value == 42
del c
pytest.gc_collect()
del a # Shouldn't delete while abase is still alive
pytest.gc_collect()
assert abase.value == 42
del abase, b
pytest.gc_collect()
def test_numpy_view(capture):
from pybind11_tests.array import ArrayClass
with capture:
ac = ArrayClass()
ac_view_1 = ac.numpy_view()
ac_view_2 = ac.numpy_view()
assert np.all(ac_view_1 == np.array([1, 2], dtype=np.int32))
del ac
pytest.gc_collect()
assert capture == """
ArrayClass()
ArrayClass::numpy_view()
ArrayClass::numpy_view()
"""
ac_view_1[0] = 4
ac_view_1[1] = 3
assert ac_view_2[0] == 4
assert ac_view_2[1] == 3
with capture:
del ac_view_1
del ac_view_2
pytest.gc_collect()
pytest.gc_collect()
assert capture == """
def create_and_destroy(*args):
a = m.NoisyAlloc(*args)
print("---")
del a
pytest.gc_collect()
def test_reallocations(capture, msg):
"""When the constructor is overloaded, previous overloads can require a preallocated value.
This test makes sure that such preallocated values only happen when they might be necessary,
and that they are deallocated properly"""
pytest.gc_collect()
with capture:
create_and_destroy(1)
assert msg(capture) == """
noisy new
noisy placement new
NoisyAlloc(int 1)
---
~NoisyAlloc()
noisy delete
"""
with capture:
create_and_destroy(1.5)
assert msg(capture) == strip_comments("""
noisy new # allocation required to attempt first overload
noisy delete # have to dealloc before considering factory init overload
noisy new # pointer factory calling "new", part 1: allocation
NoisyAlloc(double 1.5) # ... part two, invoking constructor
---
~NoisyAlloc() # Destructor
noisy delete # operator delete
""")
with capture:
create_and_destroy(2, 3)
assert msg(capture) == strip_comments("""
noisy new # pointer factory calling "new", allocation
NoisyAlloc(int 2) # constructor
---
~NoisyAlloc() # Destructor
noisy delete # operator delete
""")
with capture:
create_and_destroy(2.5, 3)
assert msg(capture) == strip_comments("""
NoisyAlloc(double 2.5) # construction (local func variable: operator_new not called)
noisy new # return-by-value "new" part 1: allocation
~NoisyAlloc() # moved-away local func variable destruction
---
~NoisyAlloc() # Destructor
noisy delete # operator delete
""")
with capture:
create_and_destroy(3.5, 4.5)
assert msg(capture) == strip_comments("""
noisy new # preallocation needed before invoking placement-new overload
noisy placement new # Placement new
NoisyAlloc(double 3.5) # construction
---
~NoisyAlloc() # Destructor
noisy delete # operator delete
""")
with capture:
create_and_destroy(4, 0.5)
assert msg(capture) == strip_comments("""
noisy new # preallocation needed before invoking placement-new overload
noisy delete # deallocation of preallocated storage
noisy new # Factory pointer allocation
NoisyAlloc(int 4) # factory pointer construction
---
~NoisyAlloc() # Destructor
noisy delete # operator delete
""")
with capture:
create_and_destroy(5, "hi")
assert msg(capture) == strip_comments("""
noisy new # preallocation needed before invoking first placement new
noisy delete # delete before considering new-style constructor
noisy new # preallocation for second placement new
noisy placement new # Placement new in the second placement new overload
NoisyAlloc(int 5) # construction
---
~NoisyAlloc() # Destructor
noisy delete # operator delete
""")
