pybind11/tests/test_class_sh_mi_thunks.py
Ralf W. Grosse-Kunstleve 48f25275c4
[smart_holder] Bake smart_holder functionality into class_ and type_caster_base (#5257)
* Put bakein branch @ 18b72c0ffa on top of smart_holder branch:

Commands used:

```
git checkout bakein
git diff smart_holder > ~/zd
git checkout smart_holder
git checkout -b bakein_sh
patch -p 1 < ~/zd
git checkout smart_holder \
MANIFEST.in \
README.rst \
README_smart_holder.rst \
docs/advanced/smart_ptrs.rst \
ubench/holder_comparison.cpp \
ubench/holder_comparison.py \
ubench/holder_comparison_extract_sheet_data.py \
ubench/number_bucket.h \
ubench/python/number_bucket.clif
git add -A
```

* Add back README_smart_holder.rst in tests/extra_python_package/test_files.py

* Restore smart_holder_poc.h as-is on smart_holder branch (i.e. undo `PYBIND11_SMART_HOLDER_PADDING`, which was meant for stress-testing only).

* Insert `std::move()` as suggested by @laramiel

* `property_cpp_function_sh_*` named specializations, as suggested by @laramiel (https://github.com/pybind/pybind11/pull/5257#discussion_r1688346807)

* Call `property_cpp_function_classic` member functions, rather than inlining the implementations.

* Use `PYBIND11_HAVE_INTERNALS_WITH_SMART_HOLDER_SUPPORT` in holder_comparison.cpp (holder_comparison.py is NOT changed accordingly in this commit, i.e. can still only be run if the smart_holder functionality is available).

* Systematically rename `loaded_as` to `load_as` (`shared_ptr`, `unique_ptr`) as suggested by @laramiel

* Make change as suggested by @laramiel. This makes it much more obvious that the latest implementation of `smart_holder_from_unique_ptr()` accepts all existing `return_value_policy` enum values except `copy`.

* Resolve `BAKEIN_WIP: Rewrite comment.` for `property_cpp_function_*` specializations.

* Resolve `BAKEIN_WIP: Add comment to explain: This is meant for stress-testing only.`

* Resolve all remaining BAKEIN_WIP (in pybind11/cast.h).

Leave only two pairs of SMART_HOLDER_BAKEIN_FOLLOW_ON comments: refactoring of copyable_holder_caster, move_only_holder_caster. This is best left until after the smart_holder branch is merged into the master branch.

* Remove obsolete `using holder_type = smart_holder;` in `load_helper`

* Add SMART_HOLDER_BAKEIN_FOLLOW_ON comment for `internals::default_holder`

* README_smart_holder.rst update (line count reduced from 356 to 123).
2024-07-31 06:17:31 -07:00

57 lines
1.6 KiB
Python

from __future__ import annotations
import pytest
from pybind11_tests import class_sh_mi_thunks as m
if not m.defined_PYBIND11_HAVE_INTERNALS_WITH_SMART_HOLDER_SUPPORT:
pytest.skip("smart_holder not available.", allow_module_level=True)
def test_ptrdiff_drvd_base0():
ptrdiff = m.ptrdiff_drvd_base0()
# A failure here does not (necessarily) mean that there is a bug, but that
# test_class_sh_mi_thunks is not exercising what it is supposed to.
# If this ever fails on some platforms: use pytest.skip()
# If this ever fails on all platforms: don't know, seems extremely unlikely.
assert ptrdiff != 0
@pytest.mark.parametrize(
"vec_size_fn",
[
m.vec_size_base0_raw_ptr,
m.vec_size_base0_shared_ptr,
],
)
@pytest.mark.parametrize(
"get_fn",
[
m.get_drvd_as_base0_raw_ptr,
m.get_drvd_as_base0_shared_ptr,
m.get_drvd_as_base0_unique_ptr,
],
)
def test_get_vec_size_raw_shared(get_fn, vec_size_fn):
obj = get_fn()
assert vec_size_fn(obj) == 5
@pytest.mark.parametrize(
"get_fn", [m.get_drvd_as_base0_raw_ptr, m.get_drvd_as_base0_unique_ptr]
)
def test_get_vec_size_unique(get_fn):
obj = get_fn()
assert m.vec_size_base0_unique_ptr(obj) == 5
with pytest.raises(ValueError, match="Python instance was disowned"):
m.vec_size_base0_unique_ptr(obj)
def test_get_shared_vec_size_unique():
obj = m.get_drvd_as_base0_shared_ptr()
with pytest.raises(ValueError) as exc_info:
m.vec_size_base0_unique_ptr(obj)
assert (
str(exc_info.value) == "Cannot disown external shared_ptr (load_as_unique_ptr)."
)