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189 lines
5.3 KiB
189 lines
5.3 KiB
import pytest
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from pybind11_tests import ExampleMandA, ConstructorStats
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def test_methods_and_attributes():
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instance1 = ExampleMandA()
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instance2 = 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.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(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 == 3
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assert cstats.move_constructions >= 1
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assert cstats.copy_assignments == 0
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assert cstats.move_assignments == 0
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def test_properties():
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from pybind11_tests import TestProperties
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instance = 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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def test_static_properties():
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from pybind11_tests import TestProperties as Type
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assert Type.def_readonly_static == 1
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with pytest.raises(AttributeError):
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Type.def_readonly_static = 2
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Type.def_readwrite_static = 2
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assert Type.def_readwrite_static == 2
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assert Type.def_property_readonly_static == 2
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with pytest.raises(AttributeError):
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Type.def_property_readonly_static = 3
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Type.def_property_static = 3
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assert Type.def_property_static == 3
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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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from pybind11_tests import TestPropRVP
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if not access.startswith("static"):
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obj = TestPropRVP()
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else:
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obj = 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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"""
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from pybind11_tests import TestPropRVP
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instance = TestPropRVP()
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o = instance.rvalue
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assert o.value == 1
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o = TestPropRVP.static_rvalue
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assert o.value == 1
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def test_dynamic_attributes():
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from pybind11_tests import DynamicClass, CppDerivedDynamicClass
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instance = 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(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(DynamicClass):
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pass
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for cls in 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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def test_cyclic_gc():
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from pybind11_tests import DynamicClass
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# One object references itself
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instance = DynamicClass()
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instance.circular_reference = instance
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cstats = ConstructorStats.get(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 = DynamicClass()
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i2 = 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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