knx/examples/knxPython/pybind11/tests/test_methods_and_attributes.py
2024-06-29 16:50:08 +02:00

540 lines
18 KiB
Python

from __future__ import annotations
import sys
import pytest
import env # noqa: F401
from pybind11_tests import ConstructorStats
from pybind11_tests import methods_and_attributes as m
NO_GETTER_MSG = (
"unreadable attribute" if sys.version_info < (3, 11) else "object has no getter"
)
NO_SETTER_MSG = (
"can't set attribute" if sys.version_info < (3, 11) else "object has no setter"
)
NO_DELETER_MSG = (
"can't delete attribute" if sys.version_info < (3, 11) else "object has no deleter"
)
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(4.0, 4.0) == "(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(8.0, 8.0) == "(float, float) const"
assert instance1.overloaded_float(1, 1) == "(float, float)"
assert instance1.overloaded_float(1, 1.0) == "(float, float)"
assert instance1.overloaded_float(1.0, 1) == "(float, float)"
assert instance1.overloaded_float(1.0, 1.0) == "(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 == 2
assert cstats.move_constructions >= 2
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
with pytest.raises(AttributeError) as excinfo:
dummy = instance.def_property_writeonly # unused var
assert NO_GETTER_MSG in str(excinfo.value)
instance.def_property_writeonly = 4
assert instance.def_property_readonly == 4
with pytest.raises(AttributeError) as excinfo:
dummy = instance.def_property_impossible # noqa: F841 unused var
assert NO_GETTER_MSG in str(excinfo.value)
with pytest.raises(AttributeError) as excinfo:
instance.def_property_impossible = 5
assert NO_SETTER_MSG in str(excinfo.value)
def test_static_properties():
assert m.TestProperties.def_readonly_static == 1
with pytest.raises(AttributeError) as excinfo:
m.TestProperties.def_readonly_static = 2
assert NO_SETTER_MSG in str(excinfo.value)
m.TestProperties.def_readwrite_static = 2
assert m.TestProperties.def_readwrite_static == 2
with pytest.raises(AttributeError) as excinfo:
dummy = m.TestProperties.def_writeonly_static # unused var
assert NO_GETTER_MSG in str(excinfo.value)
m.TestProperties.def_writeonly_static = 3
assert m.TestProperties.def_readonly_static == 3
assert m.TestProperties.def_property_readonly_static == 3
with pytest.raises(AttributeError) as excinfo:
m.TestProperties.def_property_readonly_static = 99
assert NO_SETTER_MSG in str(excinfo.value)
m.TestProperties.def_property_static = 4
assert m.TestProperties.def_property_static == 4
with pytest.raises(AttributeError) as excinfo:
dummy = m.TestProperties.def_property_writeonly_static
assert NO_GETTER_MSG in str(excinfo.value)
m.TestProperties.def_property_writeonly_static = 5
assert m.TestProperties.def_property_static == 5
# 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
with pytest.raises(AttributeError) as excinfo:
dummy = instance.def_property_writeonly_static # noqa: F841 unused var
assert NO_GETTER_MSG in str(excinfo.value)
instance.def_property_writeonly_static = 4
assert instance.def_property_static == 4
# It should be possible to override properties in derived classes
assert m.TestPropertiesOverride().def_readonly == 99
assert m.TestPropertiesOverride.def_readonly_static == 99
# Only static attributes can be deleted
del m.TestPropertiesOverride.def_readonly_static
assert hasattr(m.TestPropertiesOverride, "def_readonly_static")
assert (
m.TestPropertiesOverride.def_readonly_static
is m.TestProperties.def_readonly_static
)
assert "def_readonly_static" not in m.TestPropertiesOverride.__dict__
properties_override = m.TestPropertiesOverride()
with pytest.raises(AttributeError) as excinfo:
del properties_override.def_readonly
assert NO_DELETER_MSG in str(excinfo.value)
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 detailed_error_messages_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; "
+ (
"#define PYBIND11_DETAILED_ERROR_MESSAGES or compile in debug mode for more details"
if not detailed_error_messages_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; "
+ (
"#define PYBIND11_DETAILED_ERROR_MESSAGES or compile in debug mode for more details"
if not detailed_error_messages_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):
obj = m.TestPropRVP() if not access.startswith("static") else 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://foss.heptapod.net/pypy/pypy/-/issues/2447
@pytest.mark.xfail("env.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://foss.heptapod.net/pypy/pypy/-/issues/2447
@pytest.mark.xfail("env.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_bad_arg_default(msg):
from pybind11_tests import detailed_error_messages_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 detailed_error_messages_enabled
else "arg(): could not convert default argument into a Python object (type not registered "
"yet?). #define PYBIND11_DETAILED_ERROR_MESSAGES or 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 detailed_error_messages_enabled
else "arg(): could not convert default argument into a Python object (type not registered "
"yet?). #define PYBIND11_DETAILED_ERROR_MESSAGES or 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
with pytest.raises(TypeError) as excinfo:
m.no_none_kwarg(None)
assert "incompatible function arguments" in str(excinfo.value)
with pytest.raises(TypeError) as excinfo:
m.no_none_kwarg(a=None)
assert "incompatible function arguments" in str(excinfo.value)
with pytest.raises(TypeError) as excinfo:
m.no_none_kwarg_kw_only(None)
assert "incompatible function arguments" in str(excinfo.value)
with pytest.raises(TypeError) as excinfo:
m.no_none_kwarg_kw_only(a=None)
assert "incompatible function arguments" in str(excinfo.value)
def test_casts_none():
"""#2778: implicit casting from None to object (not pointer)"""
a = m.NoneCastTester()
assert m.ok_obj_or_none(a) == -1
a = m.NoneCastTester(4)
assert m.ok_obj_or_none(a) == 4
a = m.NoneCastTester(None)
assert m.ok_obj_or_none(a) == -1
assert m.ok_obj_or_none(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_ref_qualified():
"""Tests that explicit lvalue ref-qualified methods can be called just like their
non ref-qualified counterparts."""
r = m.RefQualified()
assert r.value == 0
r.refQualified(17)
assert r.value == 17
assert r.constRefQualified(23) == 40
def test_overload_ordering():
"Check to see if the normal overload order (first defined) and prepend overload order works"
assert m.overload_order("string") == 1
assert m.overload_order(0) == 4
assert "1. overload_order(arg0: int) -> int" in m.overload_order.__doc__
assert "2. overload_order(arg0: str) -> int" in m.overload_order.__doc__
assert "3. overload_order(arg0: str) -> int" in m.overload_order.__doc__
assert "4. overload_order(arg0: int) -> int" in m.overload_order.__doc__
with pytest.raises(TypeError) as err:
m.overload_order(1.1)
assert "1. (arg0: int) -> int" in str(err.value)
assert "2. (arg0: str) -> int" in str(err.value)
assert "3. (arg0: str) -> int" in str(err.value)
assert "4. (arg0: int) -> int" in str(err.value)
def test_rvalue_ref_param():
r = m.RValueRefParam()
assert r.func1("123") == 3
assert r.func2("1234") == 4
assert r.func3("12345") == 5
assert r.func4("123456") == 6
def test_is_setter():
fld = m.exercise_is_setter.Field()
assert fld.int_value == -99
setter_return = fld.int_value = 100
assert isinstance(setter_return, int)
assert setter_return == 100
assert fld.int_value == 100