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import gc
import sys
import warnings
import weakref
import pytest
from gi import PyGIWarning
from gi.repository import GObject, Gio, Regress
class DerivedObj(Regress.TestObj):
def __init__(self):
super().__init__()
@pytest.mark.parametrize("obj_type", [Regress.TestObj, DerivedObj])
def test_same_object_if_object_is_alive(obj_type):
container = Regress.TestObj()
obj = obj_type()
container.set_bare(obj)
assert container.props.bare is obj
@pytest.mark.parametrize("obj_type", [Regress.TestObj, DerivedObj])
def test_object_without_instance_data_gets_deleted(obj_type):
container = Regress.TestObj()
obj = obj_type()
container.props.bare = obj
ref = weakref.ref(obj)
del obj
gc.collect() # for pypy
assert container.props.bare
assert ref() is None
@pytest.mark.parametrize("obj_type", [Regress.TestObj, DerivedObj])
def test_object_with_instance_data_gets_deleted(obj_type):
container = Regress.TestObj()
obj = obj_type()
obj.instance_data = 1
container.props.bare = obj
ref = weakref.ref(obj)
del obj
gc.collect() # for pypy
assert ref() is None
@pytest.mark.parametrize("obj_type", [Regress.TestObj, DerivedObj])
def test_object_with_instance_data_retains_data(obj_type):
container = Regress.TestObj()
obj = obj_type()
obj.instance_data = 1
container.props.bare = obj
del obj
new_obj = container.props.bare
assert new_obj.instance_data == 1
class ValueObj(Regress.TestObj):
py_int = GObject.Property(type=int)
py_model = GObject.Property(type=Gio.ListModel)
def __init__(self, value=0):
super().__init__()
self.value = value
def test_value_object_retains_init_value():
container = Regress.TestObj()
obj = ValueObj(42)
container.props.bare = obj
del obj
gc.collect() # for pypy
new_obj = container.props.bare
assert new_obj.value == 42
def test_value_object_retains_property_value():
container = Regress.TestObj()
obj = ValueObj()
obj.py_int = 42
container.props.bare = obj
del obj
gc.collect() # for pypy
new_obj = container.props.bare
assert new_obj.py_int == 42
class MySpecialListStore(GObject.Object, Gio.ListModel):
def __init__(self):
super().__init__()
def do_get_item_type(self):
return Regress.TestObj.__gtype__
def do_get_n_items(self):
return 0
def do_get_item(self, n):
raise NotImplementedError
def test_value_object_retains_object_property_value():
container = Regress.TestObj()
obj = ValueObj()
obj.model = MySpecialListStore()
container.props.bare = obj
del obj
gc.collect() # for pypy
new_obj = container.props.bare
assert new_obj.model is not None
def test_object_with_property_binding():
containers = [Regress.TestObj(), Regress.TestObj()]
binder = Regress.TestObj()
bindee = Regress.TestObj()
binder.bind_property("bare", bindee, "bare", GObject.BindingFlags.SYNC_CREATE)
containers[0].props.bare = binder
containers[1].props.bare = bindee
del binder
del bindee
gc.collect() # for pypy
new_binder = containers[0].props.bare
new_bindee = containers[1].props.bare
obj = Regress.TestObj()
new_binder.props.bare = obj
assert new_bindee.props.bare is obj
def test_object_with_signal_callback():
container = Regress.TestObj()
obj = ValueObj()
def set_up_signal_handler(self):
self.connect("first", lambda *_: self.set_property("int", 42))
set_up_signal_handler(obj)
container.props.bare = obj
obj_id = id(obj)
del obj
gc.collect() # for pypy
new_obj = container.props.bare
new_obj.emit("first")
assert obj_id == id(new_obj)
assert new_obj.props.int == 42
with warnings.catch_warnings():
warnings.filterwarnings("ignore", ".*use __slots__.*")
class SlotObj(Regress.TestObj):
__slots__ = ["py_int"]
def __init__(self):
super().__init__()
def test_class_with_slots_raises_warning():
with warnings.catch_warnings(record=True) as warn:
class _SlotClass(GObject.Object):
__slots__ = ["py_int"]
assert warn[0].category is PyGIWarning
assert "SlotClass shouldn't use __slots__." in str(warn[0].message)
def test_subclass_with_slots_raises_warning():
class BaseClass(GObject.Object):
pass
with warnings.catch_warnings(record=True) as warn:
class _SlotClass(BaseClass):
__slots__ = ["py_int"]
assert warn[0].category is PyGIWarning
assert "SlotClass shouldn't use __slots__." in str(warn[0].message)
def test_slot_object_can_be_created():
container = Regress.TestObj()
obj = SlotObj()
obj.py_int = 42
container.props.bare = obj
del obj
gc.collect() # for pypy
new_obj = container.props.bare
assert new_obj.py_int == 42
def test_slot_object_without_values_can_be_created():
container = Regress.TestObj()
obj = SlotObj()
container.props.bare = obj
del obj
gc.collect() # for pypy
new_obj = container.props.bare
assert new_obj
def test_objects_with_cyclic_dependency_and_instance_dict():
# Test with a cycle:
#
# a --> b --> c --> d
# ^-----------'
a, b, c, d = [Regress.TestObj(int=i) for i in range(4)]
b.name = "b"
a.props.bare = b
b.props.bare = c
b.c = c
c.props.bare = d
c.d = d
d.props.bare = b
d.b = b
del b, c, d
gc.collect()
gc.collect()
new_b = a.props.bare
new_c = new_b.props.bare
new_d = new_c.props.bare
assert new_d.props.bare is new_b
assert a.props.bare.name == "b"
def test_objects_with_cyclic_dependency_without_instance_dict():
# Test with a cycle:
#
# a --> b --> c --> d
# ^-----------'
a, b, c, d = [Regress.TestObj(int=i) for i in range(4)]
a.props.bare = b
b.props.bare = c
c.props.bare = d
d.props.bare = b
del b, c, d
gc.collect()
gc.collect()
new_b = a.props.bare
new_c = new_b.props.bare
new_d = new_c.props.bare
assert new_d.props.bare is new_b
def test_objects_with_cyclic_dependency_and_instance_dict_no_content():
# Test with a cycle:
#
# b <-> a <-> c
# ^---> d
a, b, c, d = [Regress.TestObj(int=i) for i in range(4)]
b.name = "b"
a.props.bare = b
a.all = [b, c, d]
b.props.bare = a
b.a = a
c.props.bare = a
c.a = a
d.props.bare = a
d.a = a
del b, c, d
gc.collect()
gc.collect()
assert a.props.bare.name == "b"
def test_chained_objects_are_collected():
# a --> b --> c
a, b, c = [Regress.TestObj(int=i) for i in range(3)]
a.b = b
b.c = c
aref = a.weak_ref()
cref = c.weak_ref()
del a, b, c
gc.collect()
gc.collect() # some more for PyPy
gc.collect()
gc.collect()
assert aref() is None
assert cref() is None
def test_objects_can_be_deleted():
a = Regress.TestObj()
pyref = weakref.ref(a)
gref = a.weak_ref()
del a
gc.collect() # for PyPy
gc.collect()
assert pyref() is None
assert gref() is None
@pytest.mark.skipif(
sys.implementation.name == "pypy", reason="Doesn't play nice with PyPy GC"
)
def test_gobject_cycle_is_collected():
# Test with a cycle:
#
# a --> b --> c
# ^-----------'
a, b, c = [Regress.TestObj(int=i) for i in range(3)]
a.b = b
b.c = c
c.a = a
ref = a.weak_ref()
del a, b, c
gc.collect()
gc.collect()
assert ref() is None
def test_object_with_post_init():
class PostInit(Regress.TestObj):
def do_constructed(self):
self.post_init_called = True
obj = PostInit()
assert obj.post_init_called
def test_object_with_post_init_and_interface():
class PostInit(Regress.TestObj, Regress.TestInterface):
number = GObject.Property(type=int)
def __init__(self):
self.post_init_called = 0
super().__init__()
def do_constructed(self):
super().do_constructed()
self.post_init_called += 1
class SubPostInit(PostInit):
def do_constructed(self):
super().do_constructed()
obj = PostInit()
subobj = SubPostInit()
assert obj.post_init_called == 1
assert subobj.post_init_called == 1
def test_object_with_post_init_raises_exception():
class PostInit(Regress.TestObj):
def do_constructed(self):
raise ValueError("Catch me")
with pytest.raises(ValueError, match="Catch me"):
PostInit()
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