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diff --git a/tests/auto/qaudiodeviceid/tst_qaudiodeviceid.cpp b/tests/auto/qaudiodeviceid/tst_qaudiodeviceid.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include <QtCore/qlocale.h>
+#include <qaudiodeviceid.h>
+#include <qaudiodeviceinfo.h>
+
+#include <QStringList>
+#include <QList>
+
+
+class tst_QAudioDeviceId : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QAudioDeviceId(QObject* parent=0) : QObject(parent) {}
+
+private slots:
+    void checkNull();
+    void checkEquality();
+};
+
+void tst_QAudioDeviceId::checkNull()
+{
+    // Default constructed is null.
+    QAudioDeviceId deviceId0;
+    QVERIFY(deviceId0.isNull());
+
+    // Null is transferred
+    QAudioDeviceId deviceId1(deviceId0);
+    QVERIFY(deviceId1.isNull());
+}
+
+void tst_QAudioDeviceId::checkEquality()
+{
+    QAudioDeviceId  deviceId0;
+    QAudioDeviceId  deviceId1;
+
+    // Null ids are equivalent
+    QVERIFY(deviceId0 == deviceId1);
+    QVERIFY(!(deviceId0 != deviceId1));
+
+    deviceId1 = QAudioDeviceInfo::defaultOutputDevice();
+
+    // Different
+    QVERIFY(deviceId0 != deviceId1);
+    QVERIFY(!(deviceId0 == deviceId1));
+
+    // Same
+    deviceId0 = deviceId1;
+
+    QVERIFY(deviceId0 == deviceId1);
+    QVERIFY(!(deviceId0 != deviceId1));
+}
+
+QTEST_MAIN(tst_QAudioDeviceId)
+
+#include "tst_qaudiodeviceid.moc"