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#!/usr/bin/env python
# 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 cases for multiple inheritance'''
import os
import sys
import unittest
from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from shiboken_paths import init_paths
init_paths()
from sample import Base1, Base2, Base3, Base4, Base5, Base6
from sample import MDerived1, MDerived2, MDerived3, MDerived4, MDerived5, SonOfMDerived1
class ExtMDerived1(MDerived1):
def __init__(self):
MDerived1.__init__(self)
self.multiplier = 20
self.base2Method_called = False
def base2Method(self):
return Base2.base2Method(self) * self.multiplier
class MultipleDerivedTest(unittest.TestCase):
'''Test cases for multiple inheritance'''
def testIsInstance(self):
'''MDerived1 is instance of its parents Base1 and Base2.'''
a = MDerived1()
self.assertTrue(isinstance(a, MDerived1))
self.assertTrue(isinstance(a, Base1))
self.assertTrue(isinstance(a, Base2))
def testIsSubclass(self):
'''MDerived1 is subclass of its parents Base1 and Base2.'''
self.assertTrue(issubclass(MDerived1, Base1))
self.assertTrue(issubclass(MDerived1, Base2))
def testCallToFunctionWithBase1ArgumentThatCastsBackToMDerived1(self):
'''MDerived1 is passed as an Base1 argument to a method that returns it casted back to MDerived1.'''
a = MDerived1()
b = MDerived1.transformFromBase1(a)
self.assertEqual(a, b)
def testCallToFunctionWithBase2ArgumentThatCastsBackToMDerived1(self):
'''MDerived1 is passed as an Base2 argument to a method that returns it casted back to MDerived1.'''
a = MDerived1()
b = MDerived1.transformFromBase2(a)
self.assertEqual(a, b)
def testPythonClassIsInstance(self):
'''Python defined class ExtMDerived1 is instance of its parents MDerived1, Base1 and Base2.'''
a = ExtMDerived1()
self.assertTrue(isinstance(a, ExtMDerived1))
self.assertTrue(isinstance(a, MDerived1))
self.assertTrue(isinstance(a, Base1))
self.assertTrue(isinstance(a, Base2))
def testPythonClassIsSubclass(self):
'''Python defined class ExtMDerived1 is subclass of its parents MDerived1, Base1 and Base2.'''
self.assertTrue(issubclass(ExtMDerived1, MDerived1))
self.assertTrue(issubclass(ExtMDerived1, Base1))
self.assertTrue(issubclass(ExtMDerived1, Base2))
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testCastFromMDerived1ToBases(self):
'''MDerived1 is casted by C++ to its parents and the binding must return the MDerived1 wrapper.'''
a = MDerived1()
refcnt = sys.getrefcount(a)
b1 = a.castToBase1()
b2 = a.castToBase2()
self.assertTrue(isinstance(b1, MDerived1))
self.assertTrue(isinstance(b2, MDerived1))
self.assertEqual(a, b1)
self.assertEqual(a, b2)
self.assertEqual(sys.getrefcount(a), refcnt + 2)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testCastFromExtMDerived1ToMDerived1Bases(self):
'''Python defined class ExtMDerived1 is casted by C++ to MDerived1 parents and the binding must return the correct ExtMDerived1 instance.'''
a = ExtMDerived1()
refcnt = sys.getrefcount(a)
b1 = a.castToBase1()
self.assertTrue(isinstance(b1, MDerived1))
self.assertTrue(isinstance(b1, ExtMDerived1))
b2 = a.castToBase2()
self.assertTrue(isinstance(b2, MDerived1))
self.assertTrue(isinstance(b2, ExtMDerived1))
self.assertEqual(a, b1)
self.assertEqual(a, b2)
self.assertEqual(sys.getrefcount(a), refcnt + 2)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testCastFromSonOfMDerived1ToBases(self):
'''SonOfMDerived1 is casted by C++ to its parents and the binding must return the SonOfMDerived1 wrapper.'''
a = SonOfMDerived1()
refcnt = sys.getrefcount(a)
md1 = a.castToMDerived1()
b1 = a.castToBase1()
b2 = a.castToBase2()
self.assertTrue(isinstance(md1, SonOfMDerived1))
self.assertTrue(isinstance(b2, SonOfMDerived1))
self.assertTrue(isinstance(b2, SonOfMDerived1))
self.assertEqual(a, md1)
self.assertEqual(a, b1)
self.assertEqual(a, b2)
self.assertEqual(sys.getrefcount(a), refcnt + 3)
def testReimplementedBase2VirtualMethodOnClassInheritingFromMDerived1(self):
a = ExtMDerived1()
value = a.base2Method()
self.assertTrue(value, Base2.base2Method(a) * a.multiplier)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testCastFromMDerived2ToBases(self):
'''MDerived2 is casted by C++ to its parents and the binding must return the MDerived2 wrapper.'''
a = MDerived2()
refcnt = sys.getrefcount(a)
b3 = a.castToBase3()
b4 = a.castToBase4()
b5 = a.castToBase5()
b6 = a.castToBase6()
self.assertTrue(isinstance(b3, MDerived2))
self.assertTrue(isinstance(b4, MDerived2))
self.assertTrue(isinstance(b5, MDerived2))
self.assertTrue(isinstance(b6, MDerived2))
self.assertEqual(a, b3)
self.assertEqual(a, b4)
self.assertEqual(a, b5)
self.assertEqual(a, b6)
self.assertEqual(sys.getrefcount(a), refcnt + 4)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testCastFromMDerived3ToBases(self):
'''MDerived3 is casted by C++ to its parents and the binding must return the MDerived3 wrapper.'''
a = MDerived3()
refcnt = sys.getrefcount(a)
md1 = a.castToMDerived1()
md2 = a.castToMDerived2()
b1 = a.castToBase1()
b2 = a.castToBase2()
b3 = a.castToBase3()
b4 = a.castToBase4()
b5 = a.castToBase5()
b6 = a.castToBase6()
self.assertTrue(isinstance(md1, MDerived3))
self.assertTrue(isinstance(md2, MDerived3))
self.assertTrue(isinstance(b1, MDerived3))
self.assertTrue(isinstance(b2, MDerived3))
self.assertTrue(isinstance(b3, MDerived3))
self.assertTrue(isinstance(b4, MDerived3))
self.assertTrue(isinstance(b5, MDerived3))
self.assertTrue(isinstance(b6, MDerived3))
self.assertEqual(a, md1)
self.assertEqual(a, md2)
self.assertEqual(a, b1)
self.assertEqual(a, b2)
self.assertEqual(a, b3)
self.assertEqual(a, b4)
self.assertEqual(a, b5)
self.assertEqual(a, b6)
self.assertEqual(sys.getrefcount(a), refcnt + 8)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testCastFromMDerived4ToBases(self):
'''MDerived4 is casted by C++ to its parents and the binding must return the MDerived4 wrapper.'''
a = MDerived4()
refcnt = sys.getrefcount(a)
b3 = a.castToBase3()
b4 = a.castToBase4()
self.assertTrue(isinstance(b3, MDerived4))
self.assertTrue(isinstance(b4, MDerived4))
self.assertEqual(a, b3)
self.assertEqual(a, b4)
self.assertEqual(sys.getrefcount(a), refcnt + 2)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testCastFromMDerived5ToBases(self):
'''MDerived5 is casted by C++ to its parents and the binding must return the MDerived5 wrapper.'''
a = MDerived5()
refcnt = sys.getrefcount(a)
b3 = a.castToBase3()
b4 = a.castToBase4()
self.assertTrue(isinstance(b3, MDerived5))
self.assertTrue(isinstance(b4, MDerived5))
self.assertEqual(a, b3)
self.assertEqual(a, b4)
self.assertEqual(sys.getrefcount(a), refcnt + 2)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testCastFromMDerived3ToBase3(self):
'''MDerived3 is casted by C++ to Base3 grandparent using both the inherited and reimplement castToBase3 methods.'''
a = MDerived3()
refcnt = sys.getrefcount(a)
b3_reimplemented = a.castToBase3()
b3_inherited = MDerived2.castToBase3(a)
self.assertTrue(isinstance(b3_reimplemented, MDerived3))
self.assertTrue(isinstance(b3_inherited, MDerived3))
self.assertEqual(a, b3_reimplemented)
self.assertEqual(a, b3_inherited)
self.assertEqual(sys.getrefcount(a), refcnt + 2)
if __name__ == '__main__':
unittest.main()
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