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++ // Copyright (C) 2023 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "treemodel.h"
++
++ #include <QObject>
++ #include <QAbstractItemModelTester>
++ #include <QTest>
++
++ using namespace Qt::StringLiterals;
++
++ //! [1]
++ class TestSimpleTreeModel : public QObject
++ {
++ Q_OBJECT
++
++ private slots:
++ void testTreeModel();
++ };
++
++ void TestSimpleTreeModel::testTreeModel()
++ {
++ constexpr auto fileName = ":/default.txt"_L1;
++ QFile file(fileName);
++ QVERIFY2(file.open(QIODevice::ReadOnly | QIODevice::Text),
++ qPrintable(fileName + " cannot be opened: "_L1 + file.errorString()));
++ TreeModel model(QString::fromUtf8(file.readAll()));
++
++ QAbstractItemModelTester tester(&model);
++ }
++
++ QTEST_APPLESS_MAIN(TestSimpleTreeModel)
++
++ #include "test.moc"
++ //! [1]