diff options
Diffstat (limited to 'ext/pybind11/tests/test_methods_and_attributes.py')
| -rw-r--r-- | ext/pybind11/tests/test_methods_and_attributes.py | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/ext/pybind11/tests/test_methods_and_attributes.py b/ext/pybind11/tests/test_methods_and_attributes.py new file mode 100644 index 000000000..2b0f8d571 --- /dev/null +++ b/ext/pybind11/tests/test_methods_and_attributes.py @@ -0,0 +1,194 @@ +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 + o = TestPropRVP.static_rvalue + assert o.value == 1 + + +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 + + +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 |