import pytest from pybind11_tests import ExampleMandA, ConstructorStats def test_methods_and_attributes(): instance1 = ExampleMandA() instance2 = ExampleMandA(32) instance1.add1(instance2) instance1.add2(instance2) instance1.add3(instance2) instance1.add4(instance2) instance1.add5(instance2) instance1.add6(32) instance1.add7(32) instance1.add8(32) instance1.add9(32) instance1.add10(32) assert str(instance1) == "ExampleMandA[value=320]" assert str(instance2) == "ExampleMandA[value=32]" assert str(instance1.self1()) == "ExampleMandA[value=320]" assert str(instance1.self2()) == "ExampleMandA[value=320]" assert str(instance1.self3()) == "ExampleMandA[value=320]" assert str(instance1.self4()) == "ExampleMandA[value=320]" assert str(instance1.self5()) == "ExampleMandA[value=320]" assert instance1.internal1() == 320 assert instance1.internal2() == 320 assert instance1.internal3() == 320 assert instance1.internal4() == 320 assert instance1.internal5() == 320 assert instance1.overloaded(1, 1.0) == "(int, float)" assert instance1.overloaded(2.0, 2) == "(float, int)" assert instance1.overloaded_const(3, 3.0) == "(int, float) const" assert instance1.overloaded_const(4.0, 4) == "(float, int) const" assert instance1.value == 320 instance1.value = 100 assert str(instance1) == "ExampleMandA[value=100]" cstats = ConstructorStats.get(ExampleMandA) assert cstats.alive() == 2 del instance1, instance2 assert cstats.alive() == 0 assert cstats.values() == ["32"] assert cstats.default_constructions == 1 assert cstats.copy_constructions == 3 assert cstats.move_constructions >= 1 assert cstats.copy_assignments == 0 assert cstats.move_assignments == 0 def test_properties(): from pybind11_tests import TestProperties instance = TestProperties() assert instance.def_readonly == 1 with pytest.raises(AttributeError): instance.def_readonly = 2 instance.def_readwrite = 2 assert instance.def_readwrite == 2 assert instance.def_property_readonly == 2 with pytest.raises(AttributeError): instance.def_property_readonly = 3 instance.def_property = 3 assert instance.def_property == 3 def test_static_properties(): from pybind11_tests import TestProperties as Type assert Type.def_readonly_static == 1 with pytest.raises(AttributeError): Type.def_readonly_static = 2 Type.def_readwrite_static = 2 assert Type.def_readwrite_static == 2 assert Type.def_property_readonly_static == 2 with pytest.raises(AttributeError): Type.def_property_readonly_static = 3 Type.def_property_static = 3 assert Type.def_property_static == 3 @pytest.mark.parametrize("access", ["ro", "rw", "static_ro", "static_rw"]) def test_property_return_value_policies(access): from pybind11_tests import TestPropRVP if not access.startswith("static"): obj = TestPropRVP() else: obj = TestPropRVP ref = getattr(obj, access + "_ref") assert ref.value == 1 ref.value = 2 assert getattr(obj, access + "_ref").value == 2 ref.value = 1 # restore original value for static properties copy = getattr(obj, access + "_copy") assert copy.value == 1 copy.value = 2 assert getattr(obj, access + "_copy").value == 1 copy = getattr(obj, access + "_func") assert copy.value == 1 copy.value = 2 assert getattr(obj, access + "_func").value == 1 def test_property_rvalue_policy(): """When returning an rvalue, the return value policy is automatically changed from `reference(_internal)` to `move`. The following would not work otherwise. """ from pybind11_tests import TestPropRVP instance = TestPropRVP() o = instance.rvalue assert o.value == 1 def test_property_rvalue_policy_static(): """When returning an rvalue, the return value policy is automatically changed from `reference(_internal)` to `move`. The following would not work otherwise. """ from pybind11_tests import TestPropRVP o = TestPropRVP.static_rvalue assert o.value == 1 # https://bitbucket.org/pypy/pypy/issues/2447 @pytest.unsupported_on_pypy def test_dynamic_attributes(): from pybind11_tests import DynamicClass, CppDerivedDynamicClass instance = DynamicClass() assert not hasattr(instance, "foo") assert "foo" not in dir(instance) # Dynamically add attribute instance.foo = 42 assert hasattr(instance, "foo") assert instance.foo == 42 assert "foo" in dir(instance) # __dict__ should be accessible and replaceable assert "foo" in instance.__dict__ instance.__dict__ = {"bar": True} assert not hasattr(instance, "foo") assert hasattr(instance, "bar") with pytest.raises(TypeError) as excinfo: instance.__dict__ = [] assert str(excinfo.value) == "__dict__ must be set to a dictionary, not a 'list'" cstats = ConstructorStats.get(DynamicClass) assert cstats.alive() == 1 del instance assert cstats.alive() == 0 # Derived classes should work as well class PythonDerivedDynamicClass(DynamicClass): pass for cls in CppDerivedDynamicClass, PythonDerivedDynamicClass: derived = cls() derived.foobar = 100 assert derived.foobar == 100 assert cstats.alive() == 1 del derived assert cstats.alive() == 0 # https://bitbucket.org/pypy/pypy/issues/2447 @pytest.unsupported_on_pypy def test_cyclic_gc(): from pybind11_tests import DynamicClass # One object references itself instance = DynamicClass() instance.circular_reference = instance cstats = ConstructorStats.get(DynamicClass) assert cstats.alive() == 1 del instance assert cstats.alive() == 0 # Two object reference each other i1 = DynamicClass() i2 = DynamicClass() i1.cycle = i2 i2.cycle = i1 assert cstats.alive() == 2 del i1, i2 assert cstats.alive() == 0