| import pytest |
| from pybind11_tests import methods_and_attributes as m |
| from pybind11_tests import ConstructorStats |
| |
| |
| def test_methods_and_attributes(): |
| instance1 = m.ExampleMandA() |
| instance2 = m.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() == "()" |
| assert instance1.overloaded(0) == "(int)" |
| assert instance1.overloaded(1, 1.0) == "(int, float)" |
| assert instance1.overloaded(2.0, 2) == "(float, int)" |
| assert instance1.overloaded(3, 3) == "(int, int)" |
| assert instance1.overloaded(4., 4.) == "(float, float)" |
| assert instance1.overloaded_const(-3) == "(int) const" |
| assert instance1.overloaded_const(5, 5.0) == "(int, float) const" |
| assert instance1.overloaded_const(6.0, 6) == "(float, int) const" |
| assert instance1.overloaded_const(7, 7) == "(int, int) const" |
| assert instance1.overloaded_const(8., 8.) == "(float, float) const" |
| assert instance1.overloaded_float(1, 1) == "(float, float)" |
| assert instance1.overloaded_float(1, 1.) == "(float, float)" |
| assert instance1.overloaded_float(1., 1) == "(float, float)" |
| assert instance1.overloaded_float(1., 1.) == "(float, float)" |
| |
| assert instance1.value == 320 |
| instance1.value = 100 |
| assert str(instance1) == "ExampleMandA[value=100]" |
| |
| cstats = ConstructorStats.get(m.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_copy_method(): |
| """Issue #443: calling copied methods fails in Python 3""" |
| |
| m.ExampleMandA.add2c = m.ExampleMandA.add2 |
| m.ExampleMandA.add2d = m.ExampleMandA.add2b |
| a = m.ExampleMandA(123) |
| assert a.value == 123 |
| a.add2(m.ExampleMandA(-100)) |
| assert a.value == 23 |
| a.add2b(m.ExampleMandA(20)) |
| assert a.value == 43 |
| a.add2c(m.ExampleMandA(6)) |
| assert a.value == 49 |
| a.add2d(m.ExampleMandA(-7)) |
| assert a.value == 42 |
| |
| |
| def test_properties(): |
| instance = m.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(): |
| assert m.TestProperties.def_readonly_static == 1 |
| with pytest.raises(AttributeError) as excinfo: |
| m.TestProperties.def_readonly_static = 2 |
| assert "can't set attribute" in str(excinfo) |
| |
| m.TestProperties.def_readwrite_static = 2 |
| assert m.TestProperties.def_readwrite_static == 2 |
| |
| assert m.TestProperties.def_property_readonly_static == 2 |
| with pytest.raises(AttributeError) as excinfo: |
| m.TestProperties.def_property_readonly_static = 3 |
| assert "can't set attribute" in str(excinfo) |
| |
| m.TestProperties.def_property_static = 3 |
| assert m.TestProperties.def_property_static == 3 |
| |
| # Static property read and write via instance |
| instance = m.TestProperties() |
| |
| m.TestProperties.def_readwrite_static = 0 |
| assert m.TestProperties.def_readwrite_static == 0 |
| assert instance.def_readwrite_static == 0 |
| |
| instance.def_readwrite_static = 2 |
| assert m.TestProperties.def_readwrite_static == 2 |
| assert instance.def_readwrite_static == 2 |
| |
| # It should be possible to override properties in derived classes |
| assert m.TestPropertiesOverride().def_readonly == 99 |
| assert m.TestPropertiesOverride.def_readonly_static == 99 |
| |
| |
| def test_static_cls(): |
| """Static property getter and setters expect the type object as the their only argument""" |
| |
| instance = m.TestProperties() |
| assert m.TestProperties.static_cls is m.TestProperties |
| assert instance.static_cls is m.TestProperties |
| |
| def check_self(self): |
| assert self is m.TestProperties |
| |
| m.TestProperties.static_cls = check_self |
| instance.static_cls = check_self |
| |
| |
| def test_metaclass_override(): |
| """Overriding pybind11's default metaclass changes the behavior of `static_property`""" |
| |
| assert type(m.ExampleMandA).__name__ == "pybind11_type" |
| assert type(m.MetaclassOverride).__name__ == "type" |
| |
| assert m.MetaclassOverride.readonly == 1 |
| assert type(m.MetaclassOverride.__dict__["readonly"]).__name__ == "pybind11_static_property" |
| |
| # Regular `type` replaces the property instead of calling `__set__()` |
| m.MetaclassOverride.readonly = 2 |
| assert m.MetaclassOverride.readonly == 2 |
| assert isinstance(m.MetaclassOverride.__dict__["readonly"], int) |
| |
| |
| def test_no_mixed_overloads(): |
| from pybind11_tests import debug_enabled |
| |
| with pytest.raises(RuntimeError) as excinfo: |
| m.ExampleMandA.add_mixed_overloads1() |
| assert (str(excinfo.value) == |
| "overloading a method with both static and instance methods is not supported; " + |
| ("compile in debug mode for more details" if not debug_enabled else |
| "error while attempting to bind static method ExampleMandA.overload_mixed1" |
| "(arg0: float) -> str") |
| ) |
| |
| with pytest.raises(RuntimeError) as excinfo: |
| m.ExampleMandA.add_mixed_overloads2() |
| assert (str(excinfo.value) == |
| "overloading a method with both static and instance methods is not supported; " + |
| ("compile in debug mode for more details" if not debug_enabled else |
| "error while attempting to bind instance method ExampleMandA.overload_mixed2" |
| "(self: pybind11_tests.methods_and_attributes.ExampleMandA, arg0: int, arg1: int)" |
| " -> str") |
| ) |
| |
| |
| @pytest.mark.parametrize("access", ["ro", "rw", "static_ro", "static_rw"]) |
| def test_property_return_value_policies(access): |
| if not access.startswith("static"): |
| obj = m.TestPropRVP() |
| else: |
| obj = m.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.""" |
| |
| instance = m.TestPropRVP() |
| o = instance.rvalue |
| assert o.value == 1 |
| |
| os = m.TestPropRVP.static_rvalue |
| assert os.value == 1 |
| |
| |
| # https://bitbucket.org/pypy/pypy/issues/2447 |
| @pytest.unsupported_on_pypy |
| def test_dynamic_attributes(): |
| instance = m.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(m.DynamicClass) |
| assert cstats.alive() == 1 |
| del instance |
| assert cstats.alive() == 0 |
| |
| # Derived classes should work as well |
| class PythonDerivedDynamicClass(m.DynamicClass): |
| pass |
| |
| for cls in m.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(): |
| # One object references itself |
| instance = m.DynamicClass() |
| instance.circular_reference = instance |
| |
| cstats = ConstructorStats.get(m.DynamicClass) |
| assert cstats.alive() == 1 |
| del instance |
| assert cstats.alive() == 0 |
| |
| # Two object reference each other |
| i1 = m.DynamicClass() |
| i2 = m.DynamicClass() |
| i1.cycle = i2 |
| i2.cycle = i1 |
| |
| assert cstats.alive() == 2 |
| del i1, i2 |
| assert cstats.alive() == 0 |
| |
| |
| def test_noconvert_args(msg): |
| a = m.ArgInspector() |
| assert msg(a.f("hi")) == """ |
| loading ArgInspector1 argument WITH conversion allowed. Argument value = hi |
| """ |
| assert msg(a.g("this is a", "this is b")) == """ |
| loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a |
| loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b |
| 13 |
| loading ArgInspector2 argument WITH conversion allowed. Argument value = (default arg inspector 2) |
| """ # noqa: E501 line too long |
| assert msg(a.g("this is a", "this is b", 42)) == """ |
| loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a |
| loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b |
| 42 |
| loading ArgInspector2 argument WITH conversion allowed. Argument value = (default arg inspector 2) |
| """ # noqa: E501 line too long |
| assert msg(a.g("this is a", "this is b", 42, "this is d")) == """ |
| loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a |
| loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b |
| 42 |
| loading ArgInspector2 argument WITH conversion allowed. Argument value = this is d |
| """ |
| assert (a.h("arg 1") == |
| "loading ArgInspector2 argument WITHOUT conversion allowed. Argument value = arg 1") |
| assert msg(m.arg_inspect_func("A1", "A2")) == """ |
| loading ArgInspector2 argument WITH conversion allowed. Argument value = A1 |
| loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = A2 |
| """ |
| |
| assert m.floats_preferred(4) == 2.0 |
| assert m.floats_only(4.0) == 2.0 |
| with pytest.raises(TypeError) as excinfo: |
| m.floats_only(4) |
| assert msg(excinfo.value) == """ |
| floats_only(): incompatible function arguments. The following argument types are supported: |
| 1. (f: float) -> float |
| |
| Invoked with: 4 |
| """ |
| |
| assert m.ints_preferred(4) == 2 |
| assert m.ints_preferred(True) == 0 |
| with pytest.raises(TypeError) as excinfo: |
| m.ints_preferred(4.0) |
| assert msg(excinfo.value) == """ |
| ints_preferred(): incompatible function arguments. The following argument types are supported: |
| 1. (i: int) -> int |
| |
| Invoked with: 4.0 |
| """ # noqa: E501 line too long |
| |
| assert m.ints_only(4) == 2 |
| with pytest.raises(TypeError) as excinfo: |
| m.ints_only(4.0) |
| assert msg(excinfo.value) == """ |
| ints_only(): incompatible function arguments. The following argument types are supported: |
| 1. (i: int) -> int |
| |
| Invoked with: 4.0 |
| """ |
| |
| |
| def test_bad_arg_default(msg): |
| from pybind11_tests import debug_enabled |
| |
| with pytest.raises(RuntimeError) as excinfo: |
| m.bad_arg_def_named() |
| assert msg(excinfo.value) == ( |
| "arg(): could not convert default argument 'a: UnregisteredType' in function " |
| "'should_fail' into a Python object (type not registered yet?)" |
| if debug_enabled else |
| "arg(): could not convert default argument into a Python object (type not registered " |
| "yet?). Compile in debug mode for more information." |
| ) |
| |
| with pytest.raises(RuntimeError) as excinfo: |
| m.bad_arg_def_unnamed() |
| assert msg(excinfo.value) == ( |
| "arg(): could not convert default argument 'UnregisteredType' in function " |
| "'should_fail' into a Python object (type not registered yet?)" |
| if debug_enabled else |
| "arg(): could not convert default argument into a Python object (type not registered " |
| "yet?). Compile in debug mode for more information." |
| ) |
| |
| |
| def test_accepts_none(msg): |
| a = m.NoneTester() |
| assert m.no_none1(a) == 42 |
| assert m.no_none2(a) == 42 |
| assert m.no_none3(a) == 42 |
| assert m.no_none4(a) == 42 |
| assert m.no_none5(a) == 42 |
| assert m.ok_none1(a) == 42 |
| assert m.ok_none2(a) == 42 |
| assert m.ok_none3(a) == 42 |
| assert m.ok_none4(a) == 42 |
| assert m.ok_none5(a) == 42 |
| |
| with pytest.raises(TypeError) as excinfo: |
| m.no_none1(None) |
| assert "incompatible function arguments" in str(excinfo.value) |
| with pytest.raises(TypeError) as excinfo: |
| m.no_none2(None) |
| assert "incompatible function arguments" in str(excinfo.value) |
| with pytest.raises(TypeError) as excinfo: |
| m.no_none3(None) |
| assert "incompatible function arguments" in str(excinfo.value) |
| with pytest.raises(TypeError) as excinfo: |
| m.no_none4(None) |
| assert "incompatible function arguments" in str(excinfo.value) |
| with pytest.raises(TypeError) as excinfo: |
| m.no_none5(None) |
| assert "incompatible function arguments" in str(excinfo.value) |
| |
| # The first one still raises because you can't pass None as a lvalue reference arg: |
| with pytest.raises(TypeError) as excinfo: |
| assert m.ok_none1(None) == -1 |
| assert msg(excinfo.value) == """ |
| ok_none1(): incompatible function arguments. The following argument types are supported: |
| 1. (arg0: m.methods_and_attributes.NoneTester) -> int |
| |
| Invoked with: None |
| """ |
| |
| # The rest take the argument as pointer or holder, and accept None: |
| assert m.ok_none2(None) == -1 |
| assert m.ok_none3(None) == -1 |
| assert m.ok_none4(None) == -1 |
| assert m.ok_none5(None) == -1 |
| |
| |
| def test_str_issue(msg): |
| """#283: __str__ called on uninitialized instance when constructor arguments invalid""" |
| |
| assert str(m.StrIssue(3)) == "StrIssue[3]" |
| |
| with pytest.raises(TypeError) as excinfo: |
| str(m.StrIssue("no", "such", "constructor")) |
| assert msg(excinfo.value) == """ |
| __init__(): incompatible constructor arguments. The following argument types are supported: |
| 1. m.methods_and_attributes.StrIssue(arg0: int) |
| 2. m.methods_and_attributes.StrIssue() |
| |
| Invoked with: 'no', 'such', 'constructor' |
| """ |
| |
| |
| def test_unregistered_base_implementations(): |
| a = m.RegisteredDerived() |
| a.do_nothing() |
| assert a.rw_value == 42 |
| assert a.ro_value == 1.25 |
| a.rw_value += 5 |
| assert a.sum() == 48.25 |
| a.increase_value() |
| assert a.rw_value == 48 |
| assert a.ro_value == 1.5 |
| assert a.sum() == 49.5 |
| assert a.rw_value_prop == 48 |
| a.rw_value_prop += 1 |
| assert a.rw_value_prop == 49 |
| a.increase_value() |
| assert a.ro_value_prop == 1.75 |
| |
| |
| def test_custom_caster_destruction(): |
| """Tests that returning a pointer to a type that gets converted with a custom type caster gets |
| destroyed when the function has py::return_value_policy::take_ownership policy applied.""" |
| |
| cstats = m.destruction_tester_cstats() |
| # This one *doesn't* have take_ownership: the pointer should be used but not destroyed: |
| z = m.custom_caster_no_destroy() |
| assert cstats.alive() == 1 and cstats.default_constructions == 1 |
| assert z |
| |
| # take_ownership applied: this constructs a new object, casts it, then destroys it: |
| z = m.custom_caster_destroy() |
| assert z |
| assert cstats.default_constructions == 2 |
| |
| # Same, but with a const pointer return (which should *not* inhibit destruction): |
| z = m.custom_caster_destroy_const() |
| assert z |
| assert cstats.default_constructions == 3 |
| |
| # Make sure we still only have the original object (from ..._no_destroy()) alive: |
| assert cstats.alive() == 1 |
