mirror of
https://github.com/pybind/pybind11.git
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9a0c96dd4c
* feat: add a priority overload with py::prepend * doc: fix wording as suggested by rwgk * feat: add get_pointer * refactor: is_prepended -> prepend (internal) * docs: suggestion from @wjakob * tests: add test covering get_pointer/set_pointer
463 lines
16 KiB
Python
463 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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import pytest
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import env # noqa: F401
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from pybind11_tests import methods_and_attributes as m
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from pybind11_tests import ConstructorStats
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def test_methods_and_attributes():
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instance1 = m.ExampleMandA()
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instance2 = m.ExampleMandA(32)
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instance1.add1(instance2)
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instance1.add2(instance2)
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instance1.add3(instance2)
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instance1.add4(instance2)
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instance1.add5(instance2)
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instance1.add6(32)
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instance1.add7(32)
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instance1.add8(32)
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instance1.add9(32)
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instance1.add10(32)
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assert str(instance1) == "ExampleMandA[value=320]"
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assert str(instance2) == "ExampleMandA[value=32]"
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assert str(instance1.self1()) == "ExampleMandA[value=320]"
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assert str(instance1.self2()) == "ExampleMandA[value=320]"
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assert str(instance1.self3()) == "ExampleMandA[value=320]"
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assert str(instance1.self4()) == "ExampleMandA[value=320]"
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assert str(instance1.self5()) == "ExampleMandA[value=320]"
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assert instance1.internal1() == 320
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assert instance1.internal2() == 320
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assert instance1.internal3() == 320
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assert instance1.internal4() == 320
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assert instance1.internal5() == 320
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assert instance1.overloaded() == "()"
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assert instance1.overloaded(0) == "(int)"
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assert instance1.overloaded(1, 1.0) == "(int, float)"
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assert instance1.overloaded(2.0, 2) == "(float, int)"
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assert instance1.overloaded(3, 3) == "(int, int)"
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assert instance1.overloaded(4., 4.) == "(float, float)"
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assert instance1.overloaded_const(-3) == "(int) const"
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assert instance1.overloaded_const(5, 5.0) == "(int, float) const"
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assert instance1.overloaded_const(6.0, 6) == "(float, int) const"
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assert instance1.overloaded_const(7, 7) == "(int, int) const"
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assert instance1.overloaded_const(8., 8.) == "(float, float) const"
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assert instance1.overloaded_float(1, 1) == "(float, float)"
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assert instance1.overloaded_float(1, 1.) == "(float, float)"
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assert instance1.overloaded_float(1., 1) == "(float, float)"
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assert instance1.overloaded_float(1., 1.) == "(float, float)"
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assert instance1.value == 320
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instance1.value = 100
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assert str(instance1) == "ExampleMandA[value=100]"
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cstats = ConstructorStats.get(m.ExampleMandA)
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assert cstats.alive() == 2
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del instance1, instance2
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assert cstats.alive() == 0
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assert cstats.values() == ["32"]
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assert cstats.default_constructions == 1
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assert cstats.copy_constructions == 2
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assert cstats.move_constructions >= 2
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assert cstats.copy_assignments == 0
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assert cstats.move_assignments == 0
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def test_copy_method():
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"""Issue #443: calling copied methods fails in Python 3"""
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m.ExampleMandA.add2c = m.ExampleMandA.add2
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m.ExampleMandA.add2d = m.ExampleMandA.add2b
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a = m.ExampleMandA(123)
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assert a.value == 123
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a.add2(m.ExampleMandA(-100))
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assert a.value == 23
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a.add2b(m.ExampleMandA(20))
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assert a.value == 43
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a.add2c(m.ExampleMandA(6))
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assert a.value == 49
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a.add2d(m.ExampleMandA(-7))
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assert a.value == 42
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def test_properties():
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instance = m.TestProperties()
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assert instance.def_readonly == 1
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with pytest.raises(AttributeError):
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instance.def_readonly = 2
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instance.def_readwrite = 2
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assert instance.def_readwrite == 2
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assert instance.def_property_readonly == 2
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with pytest.raises(AttributeError):
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instance.def_property_readonly = 3
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instance.def_property = 3
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assert instance.def_property == 3
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with pytest.raises(AttributeError) as excinfo:
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dummy = instance.def_property_writeonly # noqa: F841 unused var
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assert "unreadable attribute" in str(excinfo.value)
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instance.def_property_writeonly = 4
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assert instance.def_property_readonly == 4
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with pytest.raises(AttributeError) as excinfo:
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dummy = instance.def_property_impossible # noqa: F841 unused var
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assert "unreadable attribute" in str(excinfo.value)
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with pytest.raises(AttributeError) as excinfo:
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instance.def_property_impossible = 5
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assert "can't set attribute" in str(excinfo.value)
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def test_static_properties():
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assert m.TestProperties.def_readonly_static == 1
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with pytest.raises(AttributeError) as excinfo:
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m.TestProperties.def_readonly_static = 2
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assert "can't set attribute" in str(excinfo.value)
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m.TestProperties.def_readwrite_static = 2
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assert m.TestProperties.def_readwrite_static == 2
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with pytest.raises(AttributeError) as excinfo:
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dummy = m.TestProperties.def_writeonly_static # noqa: F841 unused var
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assert "unreadable attribute" in str(excinfo.value)
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m.TestProperties.def_writeonly_static = 3
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assert m.TestProperties.def_readonly_static == 3
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assert m.TestProperties.def_property_readonly_static == 3
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with pytest.raises(AttributeError) as excinfo:
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m.TestProperties.def_property_readonly_static = 99
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assert "can't set attribute" in str(excinfo.value)
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m.TestProperties.def_property_static = 4
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assert m.TestProperties.def_property_static == 4
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with pytest.raises(AttributeError) as excinfo:
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dummy = m.TestProperties.def_property_writeonly_static
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assert "unreadable attribute" in str(excinfo.value)
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m.TestProperties.def_property_writeonly_static = 5
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assert m.TestProperties.def_property_static == 5
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# Static property read and write via instance
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instance = m.TestProperties()
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m.TestProperties.def_readwrite_static = 0
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assert m.TestProperties.def_readwrite_static == 0
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assert instance.def_readwrite_static == 0
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instance.def_readwrite_static = 2
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assert m.TestProperties.def_readwrite_static == 2
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assert instance.def_readwrite_static == 2
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with pytest.raises(AttributeError) as excinfo:
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dummy = instance.def_property_writeonly_static # noqa: F841 unused var
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assert "unreadable attribute" in str(excinfo.value)
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instance.def_property_writeonly_static = 4
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assert instance.def_property_static == 4
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# It should be possible to override properties in derived classes
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assert m.TestPropertiesOverride().def_readonly == 99
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assert m.TestPropertiesOverride.def_readonly_static == 99
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def test_static_cls():
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"""Static property getter and setters expect the type object as the their only argument"""
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instance = m.TestProperties()
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assert m.TestProperties.static_cls is m.TestProperties
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assert instance.static_cls is m.TestProperties
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def check_self(self):
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assert self is m.TestProperties
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m.TestProperties.static_cls = check_self
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instance.static_cls = check_self
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def test_metaclass_override():
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"""Overriding pybind11's default metaclass changes the behavior of `static_property`"""
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assert type(m.ExampleMandA).__name__ == "pybind11_type"
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assert type(m.MetaclassOverride).__name__ == "type"
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assert m.MetaclassOverride.readonly == 1
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assert type(m.MetaclassOverride.__dict__["readonly"]).__name__ == "pybind11_static_property"
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# Regular `type` replaces the property instead of calling `__set__()`
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m.MetaclassOverride.readonly = 2
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assert m.MetaclassOverride.readonly == 2
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assert isinstance(m.MetaclassOverride.__dict__["readonly"], int)
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def test_no_mixed_overloads():
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from pybind11_tests import debug_enabled
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with pytest.raises(RuntimeError) as excinfo:
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m.ExampleMandA.add_mixed_overloads1()
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assert (str(excinfo.value) ==
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"overloading a method with both static and instance methods is not supported; " +
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("compile in debug mode for more details" if not debug_enabled else
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"error while attempting to bind static method ExampleMandA.overload_mixed1"
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"(arg0: float) -> str")
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)
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with pytest.raises(RuntimeError) as excinfo:
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m.ExampleMandA.add_mixed_overloads2()
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assert (str(excinfo.value) ==
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"overloading a method with both static and instance methods is not supported; " +
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("compile in debug mode for more details" if not debug_enabled else
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"error while attempting to bind instance method ExampleMandA.overload_mixed2"
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"(self: pybind11_tests.methods_and_attributes.ExampleMandA, arg0: int, arg1: int)"
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" -> str")
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)
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@pytest.mark.parametrize("access", ["ro", "rw", "static_ro", "static_rw"])
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def test_property_return_value_policies(access):
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if not access.startswith("static"):
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obj = m.TestPropRVP()
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else:
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obj = m.TestPropRVP
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ref = getattr(obj, access + "_ref")
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assert ref.value == 1
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ref.value = 2
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assert getattr(obj, access + "_ref").value == 2
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ref.value = 1 # restore original value for static properties
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copy = getattr(obj, access + "_copy")
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assert copy.value == 1
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copy.value = 2
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assert getattr(obj, access + "_copy").value == 1
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copy = getattr(obj, access + "_func")
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assert copy.value == 1
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copy.value = 2
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assert getattr(obj, access + "_func").value == 1
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def test_property_rvalue_policy():
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"""When returning an rvalue, the return value policy is automatically changed from
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`reference(_internal)` to `move`. The following would not work otherwise."""
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instance = m.TestPropRVP()
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o = instance.rvalue
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assert o.value == 1
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os = m.TestPropRVP.static_rvalue
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assert os.value == 1
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# https://foss.heptapod.net/pypy/pypy/-/issues/2447
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@pytest.mark.xfail("env.PYPY")
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def test_dynamic_attributes():
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instance = m.DynamicClass()
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assert not hasattr(instance, "foo")
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assert "foo" not in dir(instance)
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# Dynamically add attribute
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instance.foo = 42
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assert hasattr(instance, "foo")
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assert instance.foo == 42
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assert "foo" in dir(instance)
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# __dict__ should be accessible and replaceable
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assert "foo" in instance.__dict__
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instance.__dict__ = {"bar": True}
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assert not hasattr(instance, "foo")
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assert hasattr(instance, "bar")
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with pytest.raises(TypeError) as excinfo:
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instance.__dict__ = []
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assert str(excinfo.value) == "__dict__ must be set to a dictionary, not a 'list'"
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cstats = ConstructorStats.get(m.DynamicClass)
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assert cstats.alive() == 1
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del instance
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assert cstats.alive() == 0
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# Derived classes should work as well
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class PythonDerivedDynamicClass(m.DynamicClass):
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pass
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for cls in m.CppDerivedDynamicClass, PythonDerivedDynamicClass:
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derived = cls()
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derived.foobar = 100
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assert derived.foobar == 100
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assert cstats.alive() == 1
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del derived
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assert cstats.alive() == 0
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# https://foss.heptapod.net/pypy/pypy/-/issues/2447
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@pytest.mark.xfail("env.PYPY")
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def test_cyclic_gc():
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# One object references itself
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instance = m.DynamicClass()
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instance.circular_reference = instance
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cstats = ConstructorStats.get(m.DynamicClass)
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assert cstats.alive() == 1
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del instance
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assert cstats.alive() == 0
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# Two object reference each other
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i1 = m.DynamicClass()
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i2 = m.DynamicClass()
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i1.cycle = i2
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i2.cycle = i1
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assert cstats.alive() == 2
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del i1, i2
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assert cstats.alive() == 0
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def test_bad_arg_default(msg):
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from pybind11_tests import debug_enabled
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with pytest.raises(RuntimeError) as excinfo:
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m.bad_arg_def_named()
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assert msg(excinfo.value) == (
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"arg(): could not convert default argument 'a: UnregisteredType' in function "
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"'should_fail' into a Python object (type not registered yet?)"
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if debug_enabled else
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"arg(): could not convert default argument into a Python object (type not registered "
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"yet?). Compile in debug mode for more information."
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)
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with pytest.raises(RuntimeError) as excinfo:
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m.bad_arg_def_unnamed()
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assert msg(excinfo.value) == (
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"arg(): could not convert default argument 'UnregisteredType' in function "
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"'should_fail' into a Python object (type not registered yet?)"
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if debug_enabled else
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"arg(): could not convert default argument into a Python object (type not registered "
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"yet?). Compile in debug mode for more information."
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)
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def test_accepts_none(msg):
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a = m.NoneTester()
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assert m.no_none1(a) == 42
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assert m.no_none2(a) == 42
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assert m.no_none3(a) == 42
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assert m.no_none4(a) == 42
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assert m.no_none5(a) == 42
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assert m.ok_none1(a) == 42
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assert m.ok_none2(a) == 42
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assert m.ok_none3(a) == 42
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assert m.ok_none4(a) == 42
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assert m.ok_none5(a) == 42
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with pytest.raises(TypeError) as excinfo:
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m.no_none1(None)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.no_none2(None)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.no_none3(None)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.no_none4(None)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.no_none5(None)
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assert "incompatible function arguments" in str(excinfo.value)
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# The first one still raises because you can't pass None as a lvalue reference arg:
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with pytest.raises(TypeError) as excinfo:
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assert m.ok_none1(None) == -1
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assert msg(excinfo.value) == """
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ok_none1(): incompatible function arguments. The following argument types are supported:
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1. (arg0: m.methods_and_attributes.NoneTester) -> int
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Invoked with: None
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"""
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# The rest take the argument as pointer or holder, and accept None:
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assert m.ok_none2(None) == -1
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assert m.ok_none3(None) == -1
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assert m.ok_none4(None) == -1
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assert m.ok_none5(None) == -1
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def test_str_issue(msg):
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"""#283: __str__ called on uninitialized instance when constructor arguments invalid"""
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assert str(m.StrIssue(3)) == "StrIssue[3]"
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with pytest.raises(TypeError) as excinfo:
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str(m.StrIssue("no", "such", "constructor"))
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assert msg(excinfo.value) == """
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__init__(): incompatible constructor arguments. The following argument types are supported:
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1. m.methods_and_attributes.StrIssue(arg0: int)
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2. m.methods_and_attributes.StrIssue()
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Invoked with: 'no', 'such', 'constructor'
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"""
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def test_unregistered_base_implementations():
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a = m.RegisteredDerived()
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a.do_nothing()
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assert a.rw_value == 42
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assert a.ro_value == 1.25
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a.rw_value += 5
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assert a.sum() == 48.25
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a.increase_value()
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assert a.rw_value == 48
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assert a.ro_value == 1.5
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assert a.sum() == 49.5
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assert a.rw_value_prop == 48
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a.rw_value_prop += 1
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assert a.rw_value_prop == 49
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a.increase_value()
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assert a.ro_value_prop == 1.75
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def test_ref_qualified():
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"""Tests that explicit lvalue ref-qualified methods can be called just like their
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non ref-qualified counterparts."""
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r = m.RefQualified()
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assert r.value == 0
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r.refQualified(17)
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assert r.value == 17
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assert r.constRefQualified(23) == 40
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def test_overload_ordering():
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'Check to see if the normal overload order (first defined) and prepend overload order works'
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assert m.overload_order("string") == 1
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assert m.overload_order(0) == 4
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# Different for Python 2 vs. 3
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uni_name = type(u"").__name__
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assert "1. overload_order(arg0: int) -> int" in m.overload_order.__doc__
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assert "2. overload_order(arg0: {}) -> int".format(uni_name) in m.overload_order.__doc__
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assert "3. overload_order(arg0: {}) -> int".format(uni_name) in m.overload_order.__doc__
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assert "4. overload_order(arg0: int) -> int" in m.overload_order.__doc__
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with pytest.raises(TypeError) as err:
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m.overload_order(1.1)
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assert "1. (arg0: int) -> int" in str(err.value)
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assert "2. (arg0: {}) -> int".format(uni_name) in str(err.value)
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assert "3. (arg0: {}) -> int".format(uni_name) in str(err.value)
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assert "4. (arg0: int) -> int" in str(err.value)
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