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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QtQmlModels/private/qqmlobjectmodel_p.h>
#include <QtQmlModels/private/qqmlchangeset_p.h>
#include <QtQml/qqmlcomponent.h>
#include <QtTest/qsignalspy.h>
#include <QtTest/qtest.h>
class tst_QQmlObjectModel : public QObject
{
Q_OBJECT
private slots:
void changes();
void objectDestroyed();
};
static bool compareItems(QQmlObjectModel *model, const QObjectList &items)
{
for (int i = 0; i < items.size(); ++i) {
if (model->get(i) != items.at(i))
return false;
}
return true;
}
static bool verifyChangeSet(const QQmlChangeSet &changeSet, int expectedInserts, int expectedRemoves, bool isMove, int moveId = -1)
{
int actualRemoves = 0;
for (const QQmlChangeSet::Change &r : changeSet.removes()) {
if (r.isMove() != isMove && (!isMove || moveId == r.moveId))
return false;
actualRemoves += r.count;
}
int actualInserts = 0;
for (const QQmlChangeSet::Change &i : changeSet.inserts()) {
if (i.isMove() != isMove && (!isMove || moveId == i.moveId))
return false;
actualInserts += i.count;
}
return actualRemoves == expectedRemoves && actualInserts == expectedInserts;
}
Q_DECLARE_METATYPE(QQmlChangeSet)
void tst_QQmlObjectModel::changes()
{
QQmlObjectModel model;
qRegisterMetaType<QQmlChangeSet>();
QSignalSpy countSpy(&model, SIGNAL(countChanged()));
QSignalSpy childrenSpy(&model, SIGNAL(childrenChanged()));
QSignalSpy modelUpdateSpy(&model, SIGNAL(modelUpdated(QQmlChangeSet,bool)));
int count = 0;
int countSignals = 0;
int childrenSignals = 0;
int modelUpdateSignals = 0;
QObjectList items;
QObject item0, item1, item2, item3;
// append(item0) -> [item0]
model.append(&item0); items.append(&item0);
QCOMPARE(model.count(), ++count);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), ++countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 1, 0, false));
// insert(0, item1) -> [item1, item0]
model.insert(0, &item1); items.insert(0, &item1);
QCOMPARE(model.count(), ++count);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), ++countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 1, 0, false));
// append(item2) -> [item1, item0, item2]
model.append(&item2); items.append(&item2);
QCOMPARE(model.count(), ++count);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), ++countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 1, 0, false));
// insert(2, item3) -> [item1, item0, item3, item2]
model.insert(2, &item3); items.insert(2, &item3);
QCOMPARE(model.count(), ++count);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), ++countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 1, 0, false));
// move(0, 1) -> [item0, item1, item3, item2]
model.move(0, 1); items.move(0, 1);
QCOMPARE(model.count(), count);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 1, 1, true, 1));
// move(3, 2) -> [item0, item1, item2, item3]
model.move(3, 2); items.move(3, 2);
QCOMPARE(model.count(), count);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 1, 1, true, 2));
// remove(0) -> [item1, item2, item3]
model.remove(0); items.removeAt(0);
QCOMPARE(model.count(), --count);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), ++countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 0, 1, false));
// remove(2) -> [item1, item2]
model.remove(2); items.removeAt(2);
QCOMPARE(model.count(), --count);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), ++countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 0, 1, false));
// clear() -> []
model.clear(); items.clear();
QCOMPARE(model.count(), 0);
QVERIFY(compareItems(&model, items));
QCOMPARE(countSpy.size(), ++countSignals);
QCOMPARE(childrenSpy.size(), ++childrenSignals);
QCOMPARE(modelUpdateSpy.size(), ++modelUpdateSignals);
QVERIFY(verifyChangeSet(modelUpdateSpy.last().first().value<QQmlChangeSet>(), 0, 2, false));
}
void tst_QQmlObjectModel::objectDestroyed()
{
QQmlEngine engine;
QQmlComponent c(&engine);
c.setData(R"(
import QtQml
ObjectModel {
id: objectModel
property int gcRuns: 0
property Component objectComponent: QtObject {}
Component.onCompleted: {
objectModel.append(objectComponent.createObject())
objectModel.get(0).objectName = "first";
}
property Timer t: Timer {
running: true
interval: 1
repeat: true
onTriggered: {
gc()
objectModel.gcRuns++
}
}
}
)", QUrl());
QVERIFY2(c.isReady(), qPrintable(c.errorString()));
QScopedPointer<QObject> o(c.create());
QVERIFY(!o.isNull());
QQmlObjectModel *model = qobject_cast<QQmlObjectModel *>(o.data());
QVERIFY(model);
QCOMPARE(model->count(), 1);
QQmlListProperty<QObject> children = model->children();
QObject *child = children.at(&children, 0);
QVERIFY(child);
QCOMPARE(child->objectName(), QStringLiteral("first"));
// The object model holds on to its children if it can ...
QSignalSpy spy(child, &QObject::destroyed);
QTRY_VERIFY(model->property("gcRuns").toInt() > 4);
QCOMPARE(spy.count(), 0);
QCOMPARE(children.at(&children, 0), child);
// ... but it adapts if we manually delete the child.
delete child;
QCOMPARE(spy.count(), 1);
QCOMPARE(children.at(&children, 0), nullptr);
}
QTEST_MAIN(tst_QQmlObjectModel)
#include "tst_qqmlobjectmodel.moc"
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