tst_qslotobject.cpp

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// Copyright (C) 2025 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <QtCore/qobject.h>

#include <QtCore/qscopedvaluerollback.h>

#include <QtTest/qtest.h>

class tst_QSlotObject : public QObject

    Q_OBJECT

private Q_SLOTS:

    void uniquePtr();

    void sharedPtr();

};

void tst_QSlotObject::uniquePtr()

    using Prototype = void(*)();

    bool exists = false;

    QtPrivate::SlotObjUniquePtr p;

    QVERIFY(!p);

    auto rb = std::make_unique<QScopedValueRollback<bool>>(exists, true); // make movable

    p.reset(QtPrivate::makeCallableObject<Prototype>([rb = std::move(rb)] {}));

    QVERIFY(p);

    QVERIFY(exists);

    p.reset();

    QVERIFY(!p);

    QVERIFY(!exists);

void tst_QSlotObject::sharedPtr()

    using Prototype = void(*)();

    bool exists = false;

    QtPrivate::SlotObjUniquePtr p;

    auto rb = std::make_unique<QScopedValueRollback<bool>>(exists, true); // make movable

    p.reset(QtPrivate::makeCallableObject<Prototype>([rb = std::move(rb)] {}));

    QVERIFY(p);

    QVERIFY(exists);

    QtPrivate::SlotObjSharedPtr sp{std::move(p)};

    QVERIFY(!p);

    QVERIFY(exists);

        const auto copy = sp;

        QVERIFY(sp);

        QVERIFY(copy);

        QVERIFY(exists);

        sp = nullptr; // SlotObjSharedPtr doesn't have a reset()...

        QVERIFY(!sp);

        QVERIFY(copy);

        QVERIFY(exists);

    } // `copy` goes out of scope

    QVERIFY(!exists);

QTEST_APPLESS_MAIN(tst_QSlotObject)

#include "tst_qslotobject.moc"