test_with_boost_python: test_python_multiple_inheritance

pybind/pybind11#4762

test_with_boost_python/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.5)
+
+find_package(PythonLibs REQUIRED)
+find_package(Boost COMPONENTS python REQUIRED)
+
+# Without this, any build libraries automatically have names "lib{x}.so"
+set(CMAKE_SHARED_MODULE_PREFIX "")
+
+add_library(test_python_multiple_inheritance MODULE test_python_multiple_inheritance.cpp)
+target_link_libraries(test_python_multiple_inheritance ${Boost_LIBRARIES} ${PYTHON_LIBRARIES})
+target_include_directories(test_python_multiple_inheritance PRIVATE ${PYTHON_INCLUDE_DIRS})

test_with_boost_python/README.txt

@@ -0,0 +1,3 @@
+cmake -S . -B build -DCMAKE_VERBOSE_MAKEFILE=ON
+(cd build; make)
+pytest -vv

test_with_boost_python/test_python_multiple_inheritance.cpp

@@ -0,0 +1,46 @@
+#include <boost/python.hpp>
+
+namespace test_python_multiple_inheritance {
+
+// Copied from:
+// https://github.com/google/clif/blob/5718e4d0807fd3b6a8187dde140069120b81ecef/clif/testing/python_multiple_inheritance.h
+
+struct CppBase {
+    explicit CppBase(int value) : base_value(value) {}
+    int get_base_value() const { return base_value; }
+    void reset_base_value(int new_value) { base_value = new_value; }
+
+private:
+    int base_value;
+};
+
+struct CppDrvd : CppBase {
+    explicit CppDrvd(int value) : CppBase(value), drvd_value(value * 3) {}
+    int get_drvd_value() const { return drvd_value; }
+    void reset_drvd_value(int new_value) { drvd_value = new_value; }
+
+    int get_base_value_from_drvd() const { return get_base_value(); }
+    void reset_base_value_from_drvd(int new_value) { reset_base_value(new_value); }
+
+private:
+    int drvd_value;
+};
+
+} // namespace test_python_multiple_inheritance
+
+BOOST_PYTHON_MODULE(test_python_multiple_inheritance) {
+    using namespace test_python_multiple_inheritance;
+    namespace py = boost::python;
+
+    py::class_<CppBase>("CppBase", py::no_init)
+        .def(py::init<int>())
+        .def("get_base_value", &CppBase::get_base_value)
+        .def("reset_base_value", &CppBase::reset_base_value);
+
+    py::class_<CppDrvd, py::bases<CppBase>>("CppDrvd", py::no_init)
+        .def(py::init<int>())
+        .def("get_drvd_value", &CppDrvd::get_drvd_value)
+        .def("reset_drvd_value", &CppDrvd::reset_drvd_value)
+        .def("get_base_value_from_drvd", &CppDrvd::get_base_value_from_drvd)
+        .def("reset_base_value_from_drvd", &CppDrvd::reset_base_value_from_drvd);
+}

test_with_boost_python/test_python_multiple_inheritance.py

@@ -0,0 +1,37 @@
+# Adapted from:
+# https://github.com/google/clif/blob/5718e4d0807fd3b6a8187dde140069120b81ecef/clif/testing/python/python_multiple_inheritance_test.py
+
+from build import test_python_multiple_inheritance as m
+
+
+class PC(m.CppBase):
+    pass
+
+
+class PPCCInit(PC, m.CppDrvd):
+    def __init__(self, value):
+        PC.__init__(self, value)
+        m.CppDrvd.__init__(self, value + 1)
+
+
+def test_PC():
+    d = PC(11)
+    assert d.get_base_value() == 11
+    d.reset_base_value(13)
+    assert d.get_base_value() == 13
+
+
+def test_PPCCInit():
+    d = PPCCInit(11)
+    assert d.get_drvd_value() == 36
+    d.reset_drvd_value(55)
+    assert d.get_drvd_value() == 55
+
+    assert d.get_base_value() == 12
+    assert d.get_base_value_from_drvd() == 12
+    d.reset_base_value(20)
+    assert d.get_base_value() == 20
+    assert d.get_base_value_from_drvd() == 20
+    d.reset_base_value_from_drvd(30)
+    assert d.get_base_value() == 30
+    assert d.get_base_value_from_drvd() == 30

test_with_boost_python/test_python_multiple_inheritance_build_and_test.txt

@@ -0,0 +1,47 @@
+-- The C compiler identification is GNU 12.2.0
+-- The CXX compiler identification is GNU 12.2.0
+-- Detecting C compiler ABI info
+-- Detecting C compiler ABI info - done
+-- Check for working C compiler: /usr/bin/cc - skipped
+-- Detecting C compile features
+-- Detecting C compile features - done
+-- Detecting CXX compiler ABI info
+-- Detecting CXX compiler ABI info - done
+-- Check for working CXX compiler: /usr/bin/c++ - skipped
+-- Detecting CXX compile features
+-- Detecting CXX compile features - done
+-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython3.11.so (found version "3.11.4") 
+-- Found Boost: /usr/lib/x86_64-linux-gnu/cmake/Boost-1.74.0/BoostConfig.cmake (found version "1.74.0") found components: python 
+-- Configuring done
+-- Generating done
+-- Build files have been written to: /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build
+/usr/bin/cmake -S/usr/local/google/home/rwgk/clone/stuff/test_with_boost_python -B/usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build --check-build-system CMakeFiles/Makefile.cmake 0
+/usr/bin/cmake -E cmake_progress_start /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build/CMakeFiles /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build//CMakeFiles/progress.marks
+make  -f CMakeFiles/Makefile2 all
+make[1]: Entering directory '/usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build'
+make  -f CMakeFiles/test_python_multiple_inheritance.dir/build.make CMakeFiles/test_python_multiple_inheritance.dir/depend
+make[2]: Entering directory '/usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build'
+cd /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build/CMakeFiles/test_python_multiple_inheritance.dir/DependInfo.cmake --color=
+make[2]: Leaving directory '/usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build'
+make  -f CMakeFiles/test_python_multiple_inheritance.dir/build.make CMakeFiles/test_python_multiple_inheritance.dir/build
+make[2]: Entering directory '/usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build'
+[ 50%] Building CXX object CMakeFiles/test_python_multiple_inheritance.dir/test_python_multiple_inheritance.cpp.o
+/usr/bin/c++ -DBOOST_ALL_NO_LIB -DBOOST_PYTHON_DYN_LINK -Dtest_python_multiple_inheritance_EXPORTS -I/usr/include/python3.11 -fPIC -MD -MT CMakeFiles/test_python_multiple_inheritance.dir/test_python_multiple_inheritance.cpp.o -MF CMakeFiles/test_python_multiple_inheritance.dir/test_python_multiple_inheritance.cpp.o.d -o CMakeFiles/test_python_multiple_inheritance.dir/test_python_multiple_inheritance.cpp.o -c /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/test_python_multiple_inheritance.cpp
+[100%] Linking CXX shared module test_python_multiple_inheritance.so
+/usr/bin/cmake -E cmake_link_script CMakeFiles/test_python_multiple_inheritance.dir/link.txt --verbose=1
+/usr/bin/c++ -fPIC -shared  -o test_python_multiple_inheritance.so CMakeFiles/test_python_multiple_inheritance.dir/test_python_multiple_inheritance.cpp.o  /usr/lib/x86_64-linux-gnu/libboost_python311.so.1.74.0 /usr/lib/x86_64-linux-gnu/libpython3.11.so 
+make[2]: Leaving directory '/usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build'
+[100%] Built target test_python_multiple_inheritance
+make[1]: Leaving directory '/usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build'
+/usr/bin/cmake -E cmake_progress_start /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python/build/CMakeFiles 0
+============================= test session starts ==============================
+platform linux -- Python 3.11.4, pytest-7.2.1, pluggy-1.0.0+repack -- /usr/bin/python3
+cachedir: .pytest_cache
+rootdir: /usr/local/google/home/rwgk/clone/stuff/test_with_boost_python
+plugins: xdist-3.3.1
+collecting ... collected 2 items
+
+test_python_multiple_inheritance.py::test_PC PASSED                      [ 50%]
+test_python_multiple_inheritance.py::test_PPCCInit PASSED                [100%]
+
+============================== 2 passed in 0.02s ===============================

test_with_boost_python/test_python_multiple_inheritance_diffs.txt

@@ -0,0 +1,58 @@
+https://github.com/pybind/pybind11/pull/4762/commits/bdd938ad7e0e52eb749e3e58555328f6f595d815
+
+--- /usr/local/google/home/rwgk/forked/pybind11/tests/test_python_multiple_inheritance.cpp	2023-07-25 20:59:56.075087212 -0700
++++ ./test_python_multiple_inheritance.cpp	2023-07-25 22:03:08.582798952 -0700
+@@ -1,4 +1,4 @@
+-#include "pybind11_tests.h"
++#include <boost/python.hpp>
+
+ namespace test_python_multiple_inheritance {
+
+@@ -28,15 +28,16 @@
+
+ } // namespace test_python_multiple_inheritance
+
+-TEST_SUBMODULE(python_multiple_inheritance, m) {
++BOOST_PYTHON_MODULE(test_python_multiple_inheritance) {
+     using namespace test_python_multiple_inheritance;
++    namespace py = boost::python;
+
+-    py::class_<CppBase>(m, "CppBase")
++    py::class_<CppBase>("CppBase", py::no_init)
+         .def(py::init<int>())
+         .def("get_base_value", &CppBase::get_base_value)
+         .def("reset_base_value", &CppBase::reset_base_value);
+
+-    py::class_<CppDrvd, CppBase>(m, "CppDrvd")
++    py::class_<CppDrvd, py::bases<CppBase>>("CppDrvd", py::no_init)
+         .def(py::init<int>())
+         .def("get_drvd_value", &CppDrvd::get_drvd_value)
+         .def("reset_drvd_value", &CppDrvd::reset_drvd_value)
+--- /usr/local/google/home/rwgk/forked/pybind11/tests/test_python_multiple_inheritance.py	2023-07-25 16:09:12.790920850 -0700
++++ ./test_python_multiple_inheritance.py	2023-07-25 22:33:08.596640849 -0700
+@@ -1,7 +1,7 @@
+ # Adapted from:
+ # https://github.com/google/clif/blob/5718e4d0807fd3b6a8187dde140069120b81ecef/clif/testing/python/python_multiple_inheritance_test.py
+
+-from pybind11_tests import python_multiple_inheritance as m
++from build import test_python_multiple_inheritance as m
+
+
+ class PC(m.CppBase):
+@@ -27,13 +27,11 @@
+     d.reset_drvd_value(55)
+     assert d.get_drvd_value() == 55
+
+-    # CppBase is initialized and used when CppBase methods are called, but
+-    # CppDrvd is used when CppDrvd methods are called.
+-    assert d.get_base_value() == 11
++    assert d.get_base_value() == 12
+     assert d.get_base_value_from_drvd() == 12
+     d.reset_base_value(20)
+     assert d.get_base_value() == 20
+-    assert d.get_base_value_from_drvd() == 12
++    assert d.get_base_value_from_drvd() == 20
+     d.reset_base_value_from_drvd(30)
+-    assert d.get_base_value() == 20
++    assert d.get_base_value() == 30
+     assert d.get_base_value_from_drvd() == 30