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Adding test_unique_ptr_member (for desired PyCLIF behavior).
See also: https://github.com/pybind/pybind11/issues/2583 Does not build with upstream master or https://github.com/pybind/pybind11/pull/2047, but builds with https://github.com/RobotLocomotion/pybind11 and almost runs: ``` Running tests in directory "/usr/local/google/home/rwgk/forked/EricCousineau-TRI/pybind11/tests": ================================================================================= test session starts ================================================================================= platform linux -- Python 3.8.5, pytest-5.4.3, py-1.9.0, pluggy-0.13.1 rootdir: /usr/local/google/home/rwgk/forked/EricCousineau-TRI/pybind11/tests, inifile: pytest.ini collected 2 items test_unique_ptr_member.py .F [100%] ====================================================================================== FAILURES ======================================================================================= _____________________________________________________________________________ test_pointee_and_ptr_owner ______________________________________________________________________________ def test_pointee_and_ptr_owner(): obj = m.pointee() assert obj.get_int() == 213 m.ptr_owner(obj) with pytest.raises(ValueError) as exc_info: > obj.get_int() E Failed: DID NOT RAISE <class 'ValueError'> test_unique_ptr_member.py:17: Failed ============================================================================= 1 failed, 1 passed in 0.06s ============================================================================= ```
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tests/test_unique_ptr_member.cpp
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tests/test_unique_ptr_member.cpp
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#include "pybind11_tests.h"
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#include <memory>
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namespace pybind11_tests {
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namespace unique_ptr_member {
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class pointee { // NOT copyable.
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public:
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pointee() = default;
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int get_int() const { return 213; }
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private:
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pointee(const pointee &) = delete;
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pointee(pointee &&) = delete;
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pointee &operator=(const pointee &) = delete;
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pointee &operator=(pointee &&) = delete;
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};
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class ptr_owner {
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public:
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explicit ptr_owner(std::unique_ptr<pointee> ptr) : ptr_(std::move(ptr)) {}
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private:
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std::unique_ptr<pointee> ptr_;
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};
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// Just to have a minimal example of a typical C++ pattern.
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inline int cpp_pattern() {
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auto obj = std::unique_ptr<pointee>(new pointee);
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int result = (obj ? 10 : 0);
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ptr_owner owner(std::move(obj));
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result += (obj ? 1 : 0);
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return result;
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}
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TEST_SUBMODULE(unique_ptr_member, m) {
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m.def("cpp_pattern", cpp_pattern);
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py::class_<pointee>(m, "pointee")
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.def(py::init<>())
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.def("get_int", &pointee::get_int);
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py::class_<ptr_owner>(m, "ptr_owner")
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#ifdef FEAT_UNIQUE_PTR_ARG
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.def(py::init<std::unique_ptr<pointee>>(), py::arg("ptr"))
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#endif
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;
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}
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} // namespace unique_ptr_member
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} // namespace pybind11_tests
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tests/test_unique_ptr_member.py
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tests/test_unique_ptr_member.py
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# -*- coding: utf-8 -*-
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import pytest
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from pybind11_tests import unique_ptr_member as m
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def test_cpp_pattern():
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res = m.cpp_pattern()
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assert res == 10
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def test_pointee_and_ptr_owner():
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obj = m.pointee()
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assert obj.get_int() == 213
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m.ptr_owner(obj)
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with pytest.raises(ValueError) as exc_info:
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obj.get_int()
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assert str(exc_info.value).startswith("Missing value for wrapped C++ type ")
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