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https://github.com/pybind/pybind11.git
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5319ca3817
* Adaption of PyCLIF virtual_py_cpp_mix test. * Removing ValueError: Ownership of instance with virtual overrides in Python cannot be transferred to C++. TODO: static_assert alias class needs to inherit from virtual_overrider_self_life_support. * Bringing back ValueError: "... instance cannot safely be transferred to C++.", but based on dynamic_cast<AliasType>. * Fixing oversight: adding test_class_sh_virtual_py_cpp_mix.cpp to cmake file. * clang <= 3.6 compatibility. * Fixing oversight: dynamic_raw_ptr_cast_if_possible needs special handling for To = void. Adding corresponding missing test in test_class_sh_virtual_py_cpp_mix. Moving dynamic_raw_ptr_cast_if_possible to separate header. * Changing py::detail::virtual_overrider_self_life_support to py::virtual_overrider_self_life_support.
134 lines
3.3 KiB
Python
134 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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import pytest
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import pybind11_tests.class_sh_trampoline_shared_ptr_cpp_arg as m
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def test_shared_ptr_cpp_arg():
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import weakref
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class PyChild(m.SpBase):
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def is_base_used(self):
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return False
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tester = m.SpBaseTester()
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obj = PyChild()
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objref = weakref.ref(obj)
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# Pass the last python reference to the C++ function
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tester.set_object(obj)
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del obj
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pytest.gc_collect()
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# python reference is still around since C++ has it now
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assert objref() is not None
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assert tester.is_base_used() is False
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assert tester.obj.is_base_used() is False
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assert tester.get_object() is objref()
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def test_shared_ptr_cpp_prop():
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class PyChild(m.SpBase):
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def is_base_used(self):
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return False
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tester = m.SpBaseTester()
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# Set the last python reference as a property of the C++ object
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tester.obj = PyChild()
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pytest.gc_collect()
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# python reference is still around since C++ has it now
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assert tester.is_base_used() is False
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assert tester.has_python_instance() is True
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assert tester.obj.is_base_used() is False
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assert tester.obj.has_python_instance() is True
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def test_shared_ptr_arg_identity():
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import weakref
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tester = m.SpBaseTester()
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obj = m.SpBase()
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objref = weakref.ref(obj)
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tester.set_object(obj)
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del obj
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pytest.gc_collect()
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# SMART_HOLDER_WIP: the behavior below is DIFFERENT from PR #2839
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# python reference is gone because it is not an Alias instance
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assert objref() is None
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assert tester.has_python_instance() is False
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def test_shared_ptr_alias_nonpython():
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tester = m.SpBaseTester()
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# C++ creates the object, a python instance shouldn't exist
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tester.set_nonpython_instance()
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assert tester.is_base_used() is True
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assert tester.has_instance() is True
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assert tester.has_python_instance() is False
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# Now a python instance exists
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cobj = tester.get_object()
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assert cobj.has_python_instance()
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assert tester.has_instance() is True
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assert tester.has_python_instance() is True
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# Now it's gone
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del cobj
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pytest.gc_collect()
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assert tester.has_instance() is True
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assert tester.has_python_instance() is False
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# When we pass it as an arg to a new tester the python instance should
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# disappear because it wasn't created with an alias
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new_tester = m.SpBaseTester()
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cobj = tester.get_object()
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assert cobj.has_python_instance()
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new_tester.set_object(cobj)
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assert tester.has_python_instance() is True
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assert new_tester.has_python_instance() is True
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del cobj
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pytest.gc_collect()
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# Gone!
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assert tester.has_instance() is True
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assert tester.has_python_instance() is False
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assert new_tester.has_instance() is True
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assert new_tester.has_python_instance() is False
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def test_shared_ptr_goaway():
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import weakref
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tester = m.SpGoAwayTester()
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obj = m.SpGoAway()
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objref = weakref.ref(obj)
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assert tester.obj is None
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tester.obj = obj
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del obj
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pytest.gc_collect()
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# python reference is no longer around
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assert objref() is None
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# C++ reference is still around
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assert tester.obj is not None
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def test_infinite():
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tester = m.SpBaseTester()
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while True:
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tester.set_object(m.SpBase())
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return # Comment out for manual leak checking (use `top` command).
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