qt-everywhere-src-5.15.1/qtbase/tests/auto/widgets/kernel/qwidgetmetatype/tst_qwidgetmetatype.cpp

/****************************************************************************
**
** Copyright (C) 2012 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Stephen Kelly <stephen.kelly@kdab.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
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#include <QtTest/QtTest>
#include <qwidget.h>
#include <qlabel.h>

class tst_QWidgetMetaType : public QObject
{
    Q_OBJECT

public:
    tst_QWidgetMetaType() {}
    virtual ~tst_QWidgetMetaType() {}

private slots:
    void metaObject();
    void saveAndLoadBuiltin_data();
    void saveAndLoadBuiltin();
};

class CustomWidget : public QWidget
{
  Q_OBJECT
public:
  CustomWidget(QWidget *parent = 0)
    : QWidget(parent)
  {

  }
};

Q_STATIC_ASSERT(( QMetaTypeId2<QSizePolicy>::IsBuiltIn));
Q_STATIC_ASSERT((!QMetaTypeId2<QWidget*>::IsBuiltIn));
Q_STATIC_ASSERT((!QMetaTypeId2<QList<QSizePolicy> >::IsBuiltIn));
Q_STATIC_ASSERT((!QMetaTypeId2<QMap<QString,QSizePolicy> >::IsBuiltIn));


void tst_QWidgetMetaType::metaObject()
{
    QCOMPARE(QMetaType::metaObjectForType(qMetaTypeId<QWidget*>()), &QWidget::staticMetaObject);
    QCOMPARE(QMetaType::metaObjectForType(qMetaTypeId<QLabel*>()), &QLabel::staticMetaObject);
    QCOMPARE(QMetaType::metaObjectForType(qMetaTypeId<CustomWidget*>()), &CustomWidget::staticMetaObject);
    QCOMPARE(QMetaType::metaObjectForType(qMetaTypeId<QSizePolicy>()), &QSizePolicy::staticMetaObject);
}

template <typename T>
struct StreamingTraits
{
    // Streamable by default, as currently all widgets built-in types are streamable
    enum { isStreamable = 1 };
};

void tst_QWidgetMetaType::saveAndLoadBuiltin_data()
{
    QTest::addColumn<int>("type");
    QTest::addColumn<bool>("isStreamable");

#define ADD_METATYPE_TEST_ROW(MetaTypeName, MetaTypeId, RealType) \
    QTest::newRow(#RealType) << MetaTypeId << bool(StreamingTraits<RealType>::isStreamable);
    QT_FOR_EACH_STATIC_WIDGETS_CLASS(ADD_METATYPE_TEST_ROW)
#undef ADD_METATYPE_TEST_ROW
}

void tst_QWidgetMetaType::saveAndLoadBuiltin()
{
    QFETCH(int, type);
    QFETCH(bool, isStreamable);

    void *value = QMetaType::create(type);

    QByteArray ba;
    QDataStream stream(&ba, QIODevice::ReadWrite);
    QCOMPARE(QMetaType::save(stream, type, value), isStreamable);
    QCOMPARE(stream.status(), QDataStream::Ok);

    if (isStreamable)
        QVERIFY(QMetaType::load(stream, type, value));

    stream.device()->seek(0);
    stream.resetStatus();
    QCOMPARE(QMetaType::load(stream, type, value), isStreamable);
    QCOMPARE(stream.status(), QDataStream::Ok);

    if (isStreamable)
        QVERIFY(QMetaType::load(stream, type, value));

    QMetaType::destroy(type, value);
}


QTEST_MAIN(tst_QWidgetMetaType)
#include "tst_qwidgetmetatype.moc"