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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
#############################################################################
##
## Copyright (C) 2016 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the test suite of the Qt for Python project.
##
## $QT_BEGIN_LICENSE:GPL-EXCEPT$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3 as published by the Free Software
## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
## included in the packaging of this file. Please review the following
## information to ensure the GNU General Public License requirements will
## be met: https://www.gnu.org/licenses/gpl-3.0.html.
##
## $QT_END_LICENSE$
##
#############################################################################
'''Simple test case for accessing the exposed C++ class fields.'''
from sys import getrefcount
import unittest
from sample import Derived, Point, ObjectType
class TestAccessingCppFields(unittest.TestCase):
'''Simple test case for accessing the exposed C++ class fields.'''
def testAccessingPrimitiveTypeField(self):
'''Reads and writes a primitive type (in this case an 'int') field.'''
d = Derived()
self.assertEqual(type(d.primitiveField), int)
# attribution
old_value = d.primitiveField
new_value = 2255
d.primitiveField = new_value
self.assertEqual(d.primitiveField, new_value)
self.assertNotEqual(d.primitiveField, old_value)
# attribution with a convertible type
value = 1.2
d.primitiveField = value
self.assertEqual(d.primitiveField, int(value))
# attribution with invalid type
self.assertRaises(TypeError, lambda : setattr(d, 'primitiveField', None))
def testAccessingUsersPrimitiveTypeField(self):
'''Reads and writes an user's primitive type (in this case an 'Complex') field.'''
d = Derived()
self.assertEqual(type(d.userPrimitiveField), complex)
# attribution
old_value = d.userPrimitiveField
new_value = complex(1.1, 2.2)
d.userPrimitiveField = new_value
self.assertEqual(d.userPrimitiveField, new_value)
self.assertNotEqual(d.userPrimitiveField, old_value)
# attribution with invalid type
self.assertRaises(TypeError, lambda : setattr(d, 'userPrimitiveField', None))
def testAccessingValueTypeField(self):
'''Reads and writes a value type (in this case a 'Point') field.'''
d = Derived()
self.assertEqual(type(d.valueTypeField), Point)
# attribution
old_value = d.valueTypeField
new_value = Point(-10, 537)
d.valueTypeField = new_value
self.assertEqual(d.valueTypeField, new_value)
#object modify
d.valueTypeField.setX(10)
d.valueTypeField.setY(20)
self.assertEqual(d.valueTypeField.x(), 10)
self.assertEqual(d.valueTypeField.y(), 20)
# attribution with invalid type
self.assertRaises(TypeError, lambda : setattr(d, 'valueTypeField', 123))
def testAccessingObjectTypeField(self):
'''Reads and writes a object type (in this case an 'ObjectType') field.'''
d = Derived()
# attribution
old_value = d.objectTypeField
new_value = ObjectType()
d.objectTypeField = new_value
self.assertEqual(d.objectTypeField, new_value)
self.assertNotEqual(d.objectTypeField, old_value)
# attribution with a convertible type
value = None
d.objectTypeField = value
self.assertEqual(d.objectTypeField, value)
# attribution with invalid type
self.assertRaises(TypeError, lambda : setattr(d, 'objectTypeField', 123))
def testRefCountingAccessingObjectTypeField(self):
'''Accessing a object type field should respect the reference counting rules.'''
d = Derived()
# attributing object to instance's field should increase its reference count
o1 = ObjectType()
refcount1 = getrefcount(o1)
d.objectTypeField = o1
self.assertEqual(d.objectTypeField, o1)
self.assertEqual(getrefcount(d.objectTypeField), refcount1 + 1)
# attributing a new object to instance's field should decrease the previous object's reference count
o2 = ObjectType()
refcount2 = getrefcount(o2)
d.objectTypeField = o2
self.assertEqual(d.objectTypeField, o2)
self.assertEqual(getrefcount(o1), refcount1)
self.assertEqual(getrefcount(d.objectTypeField), refcount2 + 1)
def testRefCountingOfReferredObjectAfterDeletingReferrer(self):
'''Deleting the object referring to other object should decrease the reference count of the referee.'''
d = Derived()
o = ObjectType()
refcount = getrefcount(o)
d.objectTypeField = o
self.assertEqual(getrefcount(o), refcount + 1)
del d
self.assertEqual(getrefcount(o), refcount)
def testStaticField(self):
self.assertEqual(Derived.staticPrimitiveField, 0)
def testAccessingUnsignedIntBitField(self):
d = Derived()
# attribution
old_value = d.bitField
new_value = 1
d.bitField= new_value
self.assertEqual(d.bitField, new_value)
self.assertNotEqual(d.bitField, old_value)
# attribution with a convertible type
value = 1.2
d.bitField = value
self.assertEqual(d.bitField, int(value))
# attribution with invalid type
self.assertRaises(TypeError, lambda : setattr(d, 'bitField', None))
if __name__ == '__main__':
unittest.main()
|
