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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
from __future__ import annotations
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 QObject, QStringListModel, Signal, Property, Slot
"""Tests PySide6.QtCore.Property()"""
class TestObject(QObject):
valueChanged = Signal()
def __init__(self, parent=None):
super().__init__(parent)
self._value = -1
self.valueChanged.connect(self._changed)
self.getter_called = 0
self.setter_called = 0
self.changed_emitted = 0
@Slot(int)
def _changed(self):
self.changed_emitted += 1
def getValue(self):
self.getter_called += 1
return self._value
def setValue(self, value):
self.setter_called += 1
if (self._value != value):
self._value = value
self.valueChanged.emit()
value = Property(int, fget=getValue, fset=setValue,
notify=valueChanged)
class TestDerivedObject(QStringListModel):
valueChanged = Signal()
def __init__(self, parent=None):
super().__init__(parent)
self._value = -1
self.valueChanged.connect(self._changed)
self.getter_called = 0
self.setter_called = 0
self.changed_emitted = 0
@Slot(int)
def _changed(self):
self.changed_emitted += 1
def getValue(self):
self.getter_called += 1
return self._value
def setValue(self, value):
self.setter_called += 1
if (self._value != value):
self._value = value
self.valueChanged.emit()
value = Property(int, fget=getValue, fset=setValue,
notify=valueChanged)
class SpecialProperties(QObject):
_value = 1
def __init__(self):
super().__init__()
self._readWriteInt = 2
self._readWriteDecoratedInt = 3
def readOnlyInt(self): # Class variable properties
return 4
def readWriteInt(self):
return self._readWriteInt
def setReadWriteInt(self, v):
self._readWriteInt = v
@Property(int) # Property decorators
def readOnlyDecoratedInt(self):
return 5
@Property(int)
def readWriteDecoratedInt(self):
return self._readWriteDecoratedInt
@readWriteDecoratedInt.setter
def readWriteDecoratedInt(self, v):
self._readWriteDecoratedInt = v
constantValue = Property(int, lambda self: self._value, constant=True)
readOnlyInt = Property(int, readOnlyInt)
readWriteInt = Property(int, readWriteInt, fset=setReadWriteInt)
class PropertyTest(unittest.TestCase):
def test1Object(self):
"""Basic property test."""
testObject = TestObject()
v = testObject.value
self.assertEqual(v, -1)
self.assertEqual(testObject.getter_called, 1)
testObject.value = 42
v = testObject.value
self.assertEqual(v, 42)
self.assertEqual(testObject.changed_emitted, 1)
self.assertEqual(testObject.setter_called, 1)
self.assertEqual(testObject.getter_called, 2)
def test2DerivedObject(self):
"""PYSIDE-1255: Run the same test for a class inheriting QObject."""
testObject = TestDerivedObject()
v = testObject.value
self.assertEqual(v, -1)
self.assertEqual(testObject.getter_called, 1)
testObject.value = 42
v = testObject.value
self.assertEqual(v, 42)
self.assertEqual(testObject.changed_emitted, 1)
self.assertEqual(testObject.setter_called, 1)
self.assertEqual(testObject.getter_called, 2)
def testSpecialProperties(self):
"""PYSIDE-924, PYSIDE-3227, constant, read-only."""
testObject = SpecialProperties()
mo = testObject.metaObject()
i = mo.indexOfProperty("constantValue")
self.assertTrue(i != -1)
metaProperty = mo.property(i)
self.assertTrue(metaProperty.isConstant())
self.assertEqual(testObject.constantValue, 1)
i = mo.indexOfProperty("readWriteInt")
self.assertTrue(i != -1)
metaProperty = mo.property(i)
self.assertTrue(metaProperty.isWritable())
self.assertEqual(testObject.readWriteInt, 2)
testObject.readWriteInt = 42
self.assertEqual(testObject.readWriteInt, 42)
i = mo.indexOfProperty("readWriteDecoratedInt")
self.assertTrue(i != -1)
metaProperty = mo.property(i)
self.assertTrue(metaProperty.isWritable())
self.assertEqual(testObject.readWriteDecoratedInt, 3)
testObject.readWriteDecoratedInt = 42
self.assertEqual(testObject.readWriteDecoratedInt, 42)
i = mo.indexOfProperty("readOnlyInt")
self.assertTrue(i != -1)
metaProperty = mo.property(i)
self.assertFalse(metaProperty.isWritable())
self.assertEqual(testObject.readOnlyInt, 4)
with self.assertRaises(AttributeError):
testObject.readOnlyInt = 42
i = mo.indexOfProperty("readOnlyDecoratedInt")
self.assertTrue(i != -1)
metaProperty = mo.property(i)
self.assertFalse(metaProperty.isWritable())
self.assertEqual(testObject.readOnlyDecoratedInt, 5)
with self.assertRaises(AttributeError):
testObject.readOnlyDecoratedInt = 42
if __name__ == '__main__':
unittest.main()
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