def test_init_factory_basic():
"""Tests py::init_factory() wrapper around various ways of returning the object"""
cstats = [
ConstructorStats.get(c)
for c in [m.TestFactory1, m.TestFactory2, m.TestFactory3]
]
cstats[0].alive() # force gc
n_inst = ConstructorStats.detail_reg_inst()
x1 = m.TestFactory1(tag.unique_ptr, 3)
assert x1.value == "3"
y1 = m.TestFactory1(tag.pointer)
assert y1.value == "(empty)"
z1 = m.TestFactory1("hi!")
assert z1.value == "hi!"
assert ConstructorStats.detail_reg_inst() == n_inst + 3
x2 = m.TestFactory2(tag.move)
assert x2.value == "(empty2)"
y2 = m.TestFactory2(tag.pointer, 7)
assert y2.value == "7"
z2 = m.TestFactory2(tag.unique_ptr, "hi again")
assert z2.value == "hi again"
assert ConstructorStats.detail_reg_inst() == n_inst + 6
x3 = m.TestFactory3(tag.shared_ptr)
assert x3.value == "(empty3)"
y3 = m.TestFactory3(tag.pointer, 42)
assert y3.value == "42"
z3 = m.TestFactory3("bye")
assert z3.value == "bye"
for null_ptr_kind in [
tag.null_ptr, tag.null_unique_ptr, tag.null_shared_ptr
]:
with pytest.raises(TypeError) as excinfo:
m.TestFactory3(null_ptr_kind)
assert (str(excinfo.value) ==
"pybind11::init(): factory function returned nullptr")
assert [i.alive() for i in cstats] == [3, 3, 3]
assert ConstructorStats.detail_reg_inst() == n_inst + 9
del x1, y2, y3, z3
assert [i.alive() for i in cstats] == [2, 2, 1]
assert ConstructorStats.detail_reg_inst() == n_inst + 5
del x2, x3, y1, z1, z2
assert [i.alive() for i in cstats] == [0, 0, 0]
assert ConstructorStats.detail_reg_inst() == n_inst
assert [i.values() for i in cstats] == [
["3", "hi!"],
["7", "hi again"],
["42", "bye"],
]
assert [i.default_constructions for i in cstats] == [1, 1, 1]
def __init__(self, bad):
if bad == 1:
a = m.TestFactory2(tag.pointer, 1)
m.TestFactory6.__init__(a, tag.base, 1)
elif bad == 2:
a = m.TestFactory2(tag.pointer, 1)
m.TestFactory6.__init__(a, tag.alias, 1)
elif bad == 3:
m.TestFactory6.__init__(NotPybindDerived.__new__(NotPybindDerived), tag.base, 1)
elif bad == 4:
m.TestFactory6.__init__(NotPybindDerived.__new__(NotPybindDerived), tag.alias, 1)
def __init__(self, bad):
if bad == 1:
a = m.TestFactory2(tag.pointer, 1)
m.TestFactory1.__init__(a, tag.pointer)
elif bad == 2:
a = NotPybindDerived()
m.TestFactory1.__init__(a, tag.pointer)
