diff options
Diffstat (limited to 'sources/shiboken6/tests/samplebinding/privatector_test.py')
-rw-r--r-- | sources/shiboken6/tests/samplebinding/privatector_test.py | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sources/shiboken6/tests/samplebinding/privatector_test.py b/sources/shiboken6/tests/samplebinding/privatector_test.py new file mode 100644 index 000000000..63040388d --- /dev/null +++ b/sources/shiboken6/tests/samplebinding/privatector_test.py @@ -0,0 +1,69 @@ +#!/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 a class with only a private constructor.''' + +import gc +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 PrivateCtor + + +class PrivateCtorTest(unittest.TestCase): + '''Test case for PrivateCtor class''' + + def assertRaises(self, *args, **kwds): + if not hasattr(sys, "pypy_version_info"): + # PYSIDE-535: PyPy complains "Fatal RPython error: NotImplementedError" + return super().assertRaises(*args, **kwds) + + def testPrivateCtorInstanciation(self): + '''Test if instanciation of class with a private constructor raises an exception.''' + self.assertRaises(TypeError, PrivateCtor) + + def testPrivateCtorInheritance(self): + '''Test if inheriting from PrivateCtor raises an exception.''' + def inherit(): + class Foo(PrivateCtor): + pass + self.assertRaises(TypeError, inherit) + + def testPrivateCtorInstanceMethod(self): + '''Test if PrivateCtor.instance() method return the proper singleton.''' + pd1 = PrivateCtor.instance() + calls = pd1.instanceCalls() + self.assertEqual(type(pd1), PrivateCtor) + pd2 = PrivateCtor.instance() + self.assertEqual(pd2, pd1) + self.assertEqual(pd2.instanceCalls(), calls + 1) + + @unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount") + def testPrivateCtorRefCounting(self): + '''Test refcounting of the singleton returned by PrivateCtor.instance().''' + pd1 = PrivateCtor.instance() + calls = pd1.instanceCalls() + refcnt = sys.getrefcount(pd1) + pd2 = PrivateCtor.instance() + self.assertEqual(pd2.instanceCalls(), calls + 1) + self.assertEqual(sys.getrefcount(pd2), sys.getrefcount(pd1)) + self.assertEqual(sys.getrefcount(pd2), refcnt + 1) + del pd1 + self.assertEqual(sys.getrefcount(pd2), refcnt) + del pd2 + gc.collect() + pd3 = PrivateCtor.instance() + self.assertEqual(type(pd3), PrivateCtor) + self.assertEqual(pd3.instanceCalls(), calls + 2) + self.assertEqual(sys.getrefcount(pd3), refcnt) + + +if __name__ == '__main__': + unittest.main() |