pybind11/tests/test_class_sh_basic.py

227 lines
7.1 KiB
Python

# Importing re before pytest after observing a PyPy CI flake when importing pytest first.
from __future__ import annotations
import re
import pytest
from pybind11_tests import class_sh_basic as m
def test_atyp_constructors():
obj = m.atyp()
assert obj.__class__.__name__ == "atyp"
obj = m.atyp("")
assert obj.__class__.__name__ == "atyp"
obj = m.atyp("txtm")
assert obj.__class__.__name__ == "atyp"
@pytest.mark.parametrize(
("rtrn_f", "expected"),
[
(m.rtrn_valu, "rtrn_valu(_MvCtor)*_MvCtor"),
(m.rtrn_rref, "rtrn_rref(_MvCtor)*_MvCtor"),
(m.rtrn_cref, "rtrn_cref(_MvCtor)*_CpCtor"),
(m.rtrn_mref, "rtrn_mref(_MvCtor)*_CpCtor"),
(m.rtrn_cptr, "rtrn_cptr"),
(m.rtrn_mptr, "rtrn_mptr"),
(m.rtrn_shmp, "rtrn_shmp"),
(m.rtrn_shcp, "rtrn_shcp"),
(m.rtrn_uqmp, "rtrn_uqmp"),
(m.rtrn_uqcp, "rtrn_uqcp"),
(m.rtrn_udmp, "rtrn_udmp"),
(m.rtrn_udcp, "rtrn_udcp"),
],
)
def test_cast(rtrn_f, expected):
assert re.match(expected, m.get_mtxt(rtrn_f()))
@pytest.mark.parametrize(
("pass_f", "mtxt", "expected"),
[
(m.pass_valu, "Valu", "pass_valu:Valu(_MvCtor)*_CpCtor"),
(m.pass_cref, "Cref", "pass_cref:Cref(_MvCtor)*_MvCtor"),
(m.pass_mref, "Mref", "pass_mref:Mref(_MvCtor)*_MvCtor"),
(m.pass_cptr, "Cptr", "pass_cptr:Cptr(_MvCtor)*_MvCtor"),
(m.pass_mptr, "Mptr", "pass_mptr:Mptr(_MvCtor)*_MvCtor"),
(m.pass_shmp, "Shmp", "pass_shmp:Shmp(_MvCtor)*_MvCtor"),
(m.pass_shcp, "Shcp", "pass_shcp:Shcp(_MvCtor)*_MvCtor"),
(m.pass_uqmp, "Uqmp", "pass_uqmp:Uqmp(_MvCtor)*_MvCtor"),
(m.pass_uqcp, "Uqcp", "pass_uqcp:Uqcp(_MvCtor)*_MvCtor"),
],
)
def test_load_with_mtxt(pass_f, mtxt, expected):
assert re.match(expected, pass_f(m.atyp(mtxt)))
@pytest.mark.parametrize(
("pass_f", "rtrn_f", "expected"),
[
(m.pass_udmp, m.rtrn_udmp, "pass_udmp:rtrn_udmp"),
(m.pass_udcp, m.rtrn_udcp, "pass_udcp:rtrn_udcp"),
],
)
def test_load_with_rtrn_f(pass_f, rtrn_f, expected):
assert pass_f(rtrn_f()) == expected
@pytest.mark.parametrize(
("pass_f", "rtrn_f", "regex_expected"),
[
(
m.pass_udmp_del,
m.rtrn_udmp_del,
"pass_udmp_del:rtrn_udmp_del,udmp_deleter(_MvCtorTo)*_MvCtorTo",
),
(
m.pass_udcp_del,
m.rtrn_udcp_del,
"pass_udcp_del:rtrn_udcp_del,udcp_deleter(_MvCtorTo)*_MvCtorTo",
),
(
m.pass_udmp_del_nd,
m.rtrn_udmp_del_nd,
"pass_udmp_del_nd:rtrn_udmp_del_nd,udmp_deleter_nd(_MvCtorTo)*_MvCtorTo",
),
(
m.pass_udcp_del_nd,
m.rtrn_udcp_del_nd,
"pass_udcp_del_nd:rtrn_udcp_del_nd,udcp_deleter_nd(_MvCtorTo)*_MvCtorTo",
),
],
)
def test_deleter_roundtrip(pass_f, rtrn_f, regex_expected):
assert re.match(regex_expected, pass_f(rtrn_f()))
@pytest.mark.parametrize(
("pass_f", "rtrn_f", "expected"),
[
(m.pass_uqmp, m.rtrn_uqmp, "pass_uqmp:rtrn_uqmp"),
(m.pass_uqcp, m.rtrn_uqcp, "pass_uqcp:rtrn_uqcp"),
(m.pass_udmp, m.rtrn_udmp, "pass_udmp:rtrn_udmp"),
(m.pass_udcp, m.rtrn_udcp, "pass_udcp:rtrn_udcp"),
],
)
def test_pass_unique_ptr_disowns(pass_f, rtrn_f, expected):
obj = rtrn_f()
assert pass_f(obj) == expected
with pytest.raises(ValueError) as exc_info:
pass_f(obj)
assert str(exc_info.value) == (
"Missing value for wrapped C++ type"
+ " `pybind11_tests::class_sh_basic::atyp`:"
+ " Python instance was disowned."
)
@pytest.mark.parametrize(
("pass_f", "rtrn_f"),
[
(m.pass_uqmp, m.rtrn_uqmp),
(m.pass_uqcp, m.rtrn_uqcp),
(m.pass_udmp, m.rtrn_udmp),
(m.pass_udcp, m.rtrn_udcp),
],
)
def test_cannot_disown_use_count_ne_1(pass_f, rtrn_f):
obj = rtrn_f()
stash = m.SharedPtrStash()
stash.Add(obj)
with pytest.raises(ValueError) as exc_info:
pass_f(obj)
assert str(exc_info.value) == (
"Cannot disown use_count != 1 (loaded_as_unique_ptr)."
)
def test_unique_ptr_roundtrip(num_round_trips=1000):
# Multiple roundtrips to stress-test instance registration/deregistration.
recycled = m.atyp("passenger")
for _ in range(num_round_trips):
id_orig = id(recycled)
recycled = m.unique_ptr_roundtrip(recycled)
assert re.match("passenger(_MvCtor)*_MvCtor", m.get_mtxt(recycled))
id_rtrn = id(recycled)
# Ensure the returned object is a different Python instance.
assert id_rtrn != id_orig
id_orig = id_rtrn
# This currently fails, because a unique_ptr is always loaded by value
# due to pybind11/detail/smart_holder_type_casters.h:689
# I think, we need to provide more cast operators.
@pytest.mark.skip()
def test_unique_ptr_cref_roundtrip():
orig = m.atyp("passenger")
id_orig = id(orig)
mtxt_orig = m.get_mtxt(orig)
recycled = m.unique_ptr_cref_roundtrip(orig)
assert m.get_mtxt(orig) == mtxt_orig
assert m.get_mtxt(recycled) == mtxt_orig
assert id(recycled) == id_orig
@pytest.mark.parametrize(
("pass_f", "rtrn_f", "moved_out", "moved_in"),
[
(m.uconsumer.pass_valu, m.uconsumer.rtrn_valu, True, True),
(m.uconsumer.pass_rref, m.uconsumer.rtrn_valu, True, True),
(m.uconsumer.pass_valu, m.uconsumer.rtrn_lref, True, False),
(m.uconsumer.pass_valu, m.uconsumer.rtrn_cref, True, False),
],
)
def test_unique_ptr_consumer_roundtrip(pass_f, rtrn_f, moved_out, moved_in):
c = m.uconsumer()
assert not c.valid()
recycled = m.atyp("passenger")
mtxt_orig = m.get_mtxt(recycled)
assert re.match("passenger_(MvCtor){1,2}", mtxt_orig)
pass_f(c, recycled)
if moved_out:
with pytest.raises(ValueError) as excinfo:
m.get_mtxt(recycled)
assert "Python instance was disowned" in str(excinfo.value)
recycled = rtrn_f(c)
assert c.valid() != moved_in
assert m.get_mtxt(recycled) == mtxt_orig
def test_py_type_handle_of_atyp():
obj = m.py_type_handle_of_atyp()
assert obj.__class__.__name__ == "pybind11_type"
def test_function_signatures(doc):
assert (
doc(m.args_shared_ptr)
== "args_shared_ptr(arg0: m.class_sh_basic.atyp) -> m.class_sh_basic.atyp"
)
assert (
doc(m.args_shared_ptr_const)
== "args_shared_ptr_const(arg0: m.class_sh_basic.atyp) -> m.class_sh_basic.atyp"
)
assert (
doc(m.args_unique_ptr)
== "args_unique_ptr(arg0: m.class_sh_basic.atyp) -> m.class_sh_basic.atyp"
)
assert (
doc(m.args_unique_ptr_const)
== "args_unique_ptr_const(arg0: m.class_sh_basic.atyp) -> m.class_sh_basic.atyp"
)
def test_unique_ptr_return_value_policy_automatic_reference():
assert m.get_mtxt(m.rtrn_uq_automatic_reference()) == "rtrn_uq_automatic_reference"
def test_unusual_op_ref():
# Merely to test that this still exists and built successfully.
assert m.CallCastUnusualOpRefConstRef().__class__.__name__ == "LocalUnusualOpRef"
assert m.CallCastUnusualOpRefMovable().__class__.__name__ == "LocalUnusualOpRef"