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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
"""
Test for PySide's Property
==========================
This test is copied from Python's `test_property.py` and adapted to
the PySide Property implementation.
This test is to ensure maximum compatibility.
"""
# Test case for property
# more tests are in test_descr
import gc
import os
import sys
import unittest
from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from init_paths import init_test_paths
init_test_paths(False)
from PySide6.QtCore import Property, QObject
# This are the original imports.
import sys
import unittest
has_test = False
try:
from test import support
has_test = True
except ImportError:
pass
class PropertyBase(Exception):
pass
class PropertyGet(PropertyBase):
pass
class PropertySet(PropertyBase):
pass
class PropertyDel(PropertyBase):
pass
class BaseClass(QObject):
def __init__(self):
super().__init__()
self._spam = 5
@Property(object)
def spam(self):
"""BaseClass.getter"""
return self._spam
@spam.setter
def spam(self, value):
self._spam = value
@spam.deleter
def spam(self):
del self._spam
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
class SubClass(BaseClass):
@BaseClass.spam.getter
def spam(self):
"""SubClass.getter"""
raise PropertyGet(self._spam)
@spam.setter
def spam(self, value):
raise PropertySet(self._spam)
@spam.deleter
def spam(self):
raise PropertyDel(self._spam)
class PropertyDocBase(object):
_spam = 1
def _get_spam(self):
return self._spam
spam = Property(object, _get_spam, doc="spam spam spam")
class PropertyDocSub(PropertyDocBase):
@PropertyDocBase.spam.getter
def spam(self):
"""The decorator does not use this doc string"""
return self._spam
class PropertySubNewGetter(BaseClass):
@BaseClass.spam.getter
def spam(self):
"""new docstring"""
return 5
class PropertyNewGetter(QObject):
def __init__(self):
super().__init__()
@Property(object)
def spam(self):
"""original docstring"""
return 1
@spam.getter
def spam(self):
"""new docstring"""
return 8
class PropertyTests(unittest.TestCase):
def test_property_decorator_baseclass(self):
# see #1620
base = BaseClass()
self.assertEqual(base.spam, 5)
self.assertEqual(base._spam, 5)
base.spam = 10
self.assertEqual(base.spam, 10)
self.assertEqual(base._spam, 10)
delattr(base, "spam")
self.assertTrue(not hasattr(base, "spam"))
self.assertTrue(not hasattr(base, "_spam"))
base.spam = 20
self.assertEqual(base.spam, 20)
self.assertEqual(base._spam, 20)
def test_property_decorator_subclass(self):
# see #1620
sub = SubClass()
self.assertRaises(PropertyGet, getattr, sub, "spam")
self.assertRaises(PropertySet, setattr, sub, "spam", None)
self.assertRaises(PropertyDel, delattr, sub, "spam")
@unittest.skipIf(sys.flags.optimize >= 2,
"Docstrings are omitted with -O2 and above")
def test_property_decorator_subclass_doc(self):
sub = SubClass()
self.assertEqual(sub.__class__.spam.__doc__, "SubClass.getter")
@unittest.skipIf(sys.flags.optimize >= 2,
"Docstrings are omitted with -O2 and above")
def test_property_decorator_baseclass_doc(self):
base = BaseClass()
self.assertEqual(base.__class__.spam.__doc__, "BaseClass.getter")
def test_property_decorator_doc(self):
base = PropertyDocBase()
sub = PropertyDocSub()
self.assertEqual(base.__class__.spam.__doc__, "spam spam spam")
self.assertEqual(sub.__class__.spam.__doc__, "spam spam spam")
@unittest.skipIf(sys.flags.optimize >= 2,
"Docstrings are omitted with -O2 and above")
def test_property_getter_doc_override(self):
newgettersub = PropertySubNewGetter()
self.assertEqual(newgettersub.spam, 5)
self.assertEqual(newgettersub.__class__.spam.__doc__, "new docstring")
newgetter = PropertyNewGetter()
self.assertEqual(newgetter.spam, 8)
self.assertEqual(newgetter.__class__.spam.__doc__, "new docstring")
@unittest.skipIf(sys.flags.optimize >= 2,
"Docstrings are omitted with -O2 and above")
def test_property_builtin_doc_writable(self):
p = Property(object, doc='basic')
self.assertEqual(p.__doc__, 'basic')
p.__doc__ = 'extended'
self.assertEqual(p.__doc__, 'extended')
@unittest.skipIf(sys.flags.optimize >= 2,
"Docstrings are omitted with -O2 and above")
def test_property_decorator_doc_writable(self):
class PropertyWritableDoc(object):
@Property(object)
def spam(self):
"""Eggs"""
return "eggs"
sub = PropertyWritableDoc()
self.assertEqual(sub.__class__.spam.__doc__, 'Eggs')
sub.__class__.spam.__doc__ = 'Spam'
self.assertEqual(sub.__class__.spam.__doc__, 'Spam')
if has_test: # This test has no support in Python 2
@support.refcount_test
def test_refleaks_in___init__(self):
gettotalrefcount = support.get_attribute(sys, 'gettotalrefcount')
fake_prop = Property(object, 'fget', 'fset', "freset", 'fdel', 'doc')
refs_before = gettotalrefcount()
for i in range(100):
fake_prop.__init__(object, 'fget', 'fset', "freset", 'fdel', 'doc')
self.assertAlmostEqual(gettotalrefcount() - refs_before, 0, delta=10)
# Note: We ignore the whole subclass tests concerning __doc__ strings.
# See the original Python test starting with:
# "Issue 5890: subclasses of property do not preserve method __doc__ strings"
if __name__ == '__main__':
unittest.main()
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