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https://github.com/RYDE-WORK/pybind11.git
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c91f8bd627
Instead of creating a new unique metaclass for each type, the builtin `property` type is subclassed to support static properties. The new setter/getters always pass types instead of instances in their `self` argument. A metaclass is still required to support this behavior, but it doesn't store any data anymore, so a new one doesn't need to be created for each class. There is now only one common metaclass which is shared by all pybind11 types.
310 lines
10 KiB
Python
310 lines
10 KiB
Python
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.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(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(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) as excinfo:
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Type.def_readonly_static = 2
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assert "can't set attribute" in str(excinfo)
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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) as excinfo:
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Type.def_property_readonly_static = 3
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assert "can't set attribute" in str(excinfo)
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Type.def_property_static = 3
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assert Type.def_property_static == 3
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# Static property read and write via instance
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instance = Type()
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Type.def_readwrite_static = 0
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assert Type.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 Type.def_readwrite_static == 2
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assert instance.def_readwrite_static == 2
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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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from pybind11_tests import TestProperties as Type
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instance = Type()
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assert Type.static_cls is Type
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assert instance.static_cls is Type
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def check_self(self):
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assert self is Type
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Type.static_cls = check_self
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instance.static_cls = check_self
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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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def test_property_rvalue_policy_static():
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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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o = TestPropRVP.static_rvalue
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assert o.value == 1
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# https://bitbucket.org/pypy/pypy/issues/2447
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@pytest.unsupported_on_pypy
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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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# https://bitbucket.org/pypy/pypy/issues/2447
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@pytest.unsupported_on_pypy
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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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def test_noconvert_args(msg):
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from pybind11_tests import ArgInspector, arg_inspect_func, floats_only, floats_preferred
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a = ArgInspector()
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assert msg(a.f("hi")) == """
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loading ArgInspector1 argument WITH conversion allowed. Argument value = hi
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"""
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assert msg(a.g("this is a", "this is b")) == """
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loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a
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loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b
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13
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loading ArgInspector2 argument WITH conversion allowed. Argument value = (default arg inspector 2)
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""" # noqa: E501 line too long
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assert msg(a.g("this is a", "this is b", 42)) == """
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loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a
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loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b
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42
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loading ArgInspector2 argument WITH conversion allowed. Argument value = (default arg inspector 2)
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""" # noqa: E501 line too long
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assert msg(a.g("this is a", "this is b", 42, "this is d")) == """
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loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a
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loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b
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42
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loading ArgInspector2 argument WITH conversion allowed. Argument value = this is d
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"""
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assert (a.h("arg 1") ==
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"loading ArgInspector2 argument WITHOUT conversion allowed. Argument value = arg 1")
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assert msg(arg_inspect_func("A1", "A2")) == """
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loading ArgInspector2 argument WITH conversion allowed. Argument value = A1
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loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = A2
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"""
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assert floats_preferred(4) == 2.0
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assert floats_only(4.0) == 2.0
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with pytest.raises(TypeError) as excinfo:
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floats_only(4)
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assert msg(excinfo.value) == """
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floats_only(): incompatible function arguments. The following argument types are supported:
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1. (f: float) -> float
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Invoked with: 4
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"""
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def test_bad_arg_default(msg):
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from pybind11_tests import debug_enabled, bad_arg_def_named, bad_arg_def_unnamed
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with pytest.raises(RuntimeError) as excinfo:
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bad_arg_def_named()
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assert msg(excinfo.value) == (
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"arg(): could not convert default argument 'a: NotRegistered' in function 'should_fail' "
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"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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bad_arg_def_unnamed()
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assert msg(excinfo.value) == (
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"arg(): could not convert default argument 'NotRegistered' in function 'should_fail' "
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"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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