qt-everywhere-src-5.15.1/qtbase/tests/auto/corelib/kernel/qsignalblocker/tst_qsignalblocker.cpp

/****************************************************************************
**
** Copyright (C) 2013 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@woboq.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** 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.
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#include <QtTest/QtTest>

#include "qobject.h"

class tst_QSignalBlocker : public QObject
{
    Q_OBJECT
private slots:
    void signalBlocking();
    void moveAssignment();
};

void tst_QSignalBlocker::signalBlocking()
{
    QObject o;

    QVERIFY(!o.signalsBlocked());

    {
        QSignalBlocker blocker(&o);
        QVERIFY(o.signalsBlocked());

        o.blockSignals(false);
        QVERIFY(!o.signalsBlocked());

        o.blockSignals(true);
        QVERIFY(o.signalsBlocked());

        blocker.unblock();
        QVERIFY(!o.signalsBlocked());

        blocker.reblock();
        QVERIFY(o.signalsBlocked());
    }

    QVERIFY(!o.signalsBlocked());
}

void tst_QSignalBlocker::moveAssignment()
{
    QObject o1, o2;

    // move-assignment: both block other objects
    {
        QSignalBlocker b(&o1);
        QVERIFY(o1.signalsBlocked());

        QVERIFY(!o2.signalsBlocked());
        b = QSignalBlocker(&o2);
        QVERIFY(!o1.signalsBlocked());
        QVERIFY(o2.signalsBlocked());
    }

    QVERIFY(!o1.signalsBlocked());
    QVERIFY(!o2.signalsBlocked());

    // move-assignment: from inert other
    {
        QSignalBlocker b(&o1);
        QVERIFY(o1.signalsBlocked());
        b = QSignalBlocker(0);
    }

    QVERIFY(!o1.signalsBlocked());
    QVERIFY(!o2.signalsBlocked());

    // move-assignment: to inert *this
    {
        QSignalBlocker b(0);
        QVERIFY(!o1.signalsBlocked());
        {
            QSignalBlocker inner(&o1);
            QVERIFY(o1.signalsBlocked());
            b = std::move(inner);
        }
        QVERIFY(o1.signalsBlocked());
    }

    QVERIFY(!o1.signalsBlocked());
    QVERIFY(!o2.signalsBlocked());

    // move-assignment: both block the same object, neither is unblocked
    {
        QSignalBlocker b(&o1);
        QVERIFY(o1.signalsBlocked());
        {
            b.unblock(); // make sure inner.m_blocked = false
            QVERIFY(!o1.signalsBlocked());
            QSignalBlocker inner(&o1);
            QVERIFY(o1.signalsBlocked());
            b.reblock();
            QVERIFY(o1.signalsBlocked());
            b = std::move(inner);
        }
        QVERIFY(o1.signalsBlocked());
    }

    QVERIFY(!o1.signalsBlocked());
    QVERIFY(!o2.signalsBlocked());

    // move-assignment: both block the same object, but *this is unblocked
    {
        QSignalBlocker b(&o1);
        QVERIFY(o1.signalsBlocked());
        b.unblock();
        QVERIFY(!o1.signalsBlocked());
        b = QSignalBlocker(&o1);
        QVERIFY(o1.signalsBlocked());
    }

    QVERIFY(!o1.signalsBlocked());
    QVERIFY(!o2.signalsBlocked());

    // move-assignment: both block the same object, but other is unblocked
    {
        QSignalBlocker b(&o1);
        {
            QVERIFY(o1.signalsBlocked());
            QSignalBlocker inner(&o1);
            QVERIFY(o1.signalsBlocked());
            inner.unblock();
            QVERIFY(o1.signalsBlocked());
            b = std::move(inner);
            QVERIFY(!o1.signalsBlocked());
        }
        QVERIFY(!o1.signalsBlocked());
    }

    QVERIFY(!o1.signalsBlocked());
    QVERIFY(!o2.signalsBlocked());
}

QTEST_MAIN(tst_QSignalBlocker)
#include "tst_qsignalblocker.moc"