Rearrange the automatic tests.

Split them into unit and integration tests. Integration tests really need to be run on the real platform (not in a VM etc) since they are somewhat unstable or nonfunctional otherwise. A few tests were previously broken by QUrl changes and they were repaired. Removed one test since it was not providing a lot of value. There are still a number of tests that rely on Q_AUTOTEST_EXPORT symbols. Change-Id: Ic402abf0af946baa5945075d975b3f584f9ef280 Reviewed-by: Kalle Lehtonen <kalle.ju.lehtonen@nokia.com>
2011-11-04 13:38:44 +10:00
parent 7dfb883df6
commit e3a8c165ea
190 changed files with 39 additions and 596 deletions
--- a/tests/auto/integration/qcamerabackend/tst_qcamerabackend.cpp
+++ b/tests/auto/integration/qcamerabackend/tst_qcamerabackend.cpp
@@ -0,0 +1,621 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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 1.1, 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//TESTED_COMPONENT=src/multimedia
+
+#include <QtTest/QtTest>
+#include <QtGui/QImageReader>
+#include <QDebug>
+
+#include <qabstractvideosurface.h>
+#include <qcameracontrol.h>
+#include <qcameralockscontrol.h>
+#include <qcameraexposurecontrol.h>
+#include <qcameraflashcontrol.h>
+#include <qcamerafocuscontrol.h>
+#include <qcameraimagecapturecontrol.h>
+#include <qimageencodercontrol.h>
+#include <qcameraimageprocessingcontrol.h>
+#include <qcameracapturebufferformatcontrol.h>
+#include <qcameracapturedestinationcontrol.h>
+#include <qmediaservice.h>
+#include <qcamera.h>
+#include <qcameraimagecapture.h>
+#include <qgraphicsvideoitem.h>
+#include <qvideorenderercontrol.h>
+#include <qvideowidget.h>
+#include <qvideowindowcontrol.h>
+
+QT_USE_NAMESPACE
+
+// Eventually these will make it into qtestcase.h
+// but we might need to tweak the timeout values here.
+#ifndef QTRY_COMPARE
+#define QTRY_COMPARE(__expr, __expected) \
+    do { \
+        const int __step = 50; \
+        const int __timeout = 10000; \
+        if ((__expr) != (__expected)) { \
+            QTest::qWait(0); \
+        } \
+        for (int __i = 0; __i < __timeout && ((__expr) != (__expected)); __i+=__step) { \
+            QTest::qWait(__step); \
+        } \
+        QCOMPARE(__expr, __expected); \
+    } while(0)
+#endif
+
+#ifndef QTRY_VERIFY
+#define QTRY_VERIFY(__expr) \
+        do { \
+        const int __step = 50; \
+        const int __timeout = 10000; \
+        if (!(__expr)) { \
+            QTest::qWait(0); \
+        } \
+        for (int __i = 0; __i < __timeout && !(__expr); __i+=__step) { \
+            QTest::qWait(__step); \
+        } \
+        QVERIFY(__expr); \
+    } while(0)
+#endif
+
+
+#define QTRY_WAIT(code, __expr) \
+        do { \
+        const int __step = 50; \
+        const int __timeout = 10000; \
+        if (!(__expr)) { \
+            QTest::qWait(0); \
+        } \
+        for (int __i = 0; __i < __timeout && !(__expr); __i+=__step) { \
+            do { code } while(0); \
+            QTest::qWait(__step); \
+        } \
+    } while(0)
+
+
+/*
+ This is the backend conformance test.
+
+ Since it relies on platform media framework and sound hardware
+ it may be less stable.
+*/
+
+class tst_QCameraBackend: public QObject
+{
+    Q_OBJECT
+
+public slots:
+    void initTestCase();
+    void cleanupTestCase();
+
+private slots:
+    void testAvailableDevices();
+    void testDeviceDescription();
+    void testCtorWithDevice();
+
+    void testCameraStates();
+    void testCaptureMode();
+    void testCameraCapture();
+    void testCaptureToBuffer();
+    void testCameraCaptureMetadata();
+    void testExposureCompensation();
+    void testExposureMode();
+private:
+};
+
+void tst_QCameraBackend::initTestCase()
+{
+    qRegisterMetaType<QtMultimedia::MetaData>("QtMultimedia::MetaData");
+
+    QCamera camera;
+    if (!camera.isAvailable())
+        QSKIP("Camera is not available", SkipAll);
+}
+
+void tst_QCameraBackend::cleanupTestCase()
+{
+}
+
+void tst_QCameraBackend::testAvailableDevices()
+{
+    int deviceCount = QMediaServiceProvider::defaultServiceProvider()->devices(QByteArray(Q_MEDIASERVICE_CAMERA)).count();
+    QCOMPARE(QCamera::availableDevices().count(), deviceCount);
+}
+
+void tst_QCameraBackend::testDeviceDescription()
+{
+    int deviceCount = QMediaServiceProvider::defaultServiceProvider()->devices(QByteArray(Q_MEDIASERVICE_CAMERA)).count();
+
+    if (deviceCount == 0)
+        QVERIFY(QCamera::deviceDescription(QByteArray("random")).isNull());
+    else {
+        foreach (const QByteArray &device, QCamera::availableDevices())
+            QVERIFY(QCamera::deviceDescription(device).length() > 0);
+    }
+}
+
+void tst_QCameraBackend::testCtorWithDevice()
+{
+    int deviceCount = QMediaServiceProvider::defaultServiceProvider()->devices(QByteArray(Q_MEDIASERVICE_CAMERA)).count();
+    QCamera *camera = 0;
+
+    if (deviceCount == 0) {
+        camera = new QCamera("random");
+        QCOMPARE(camera->error(), QCamera::ServiceMissingError);
+    }
+    else {
+        camera = new QCamera(QCamera::availableDevices().first());
+        QCOMPARE(camera->error(), QCamera::NoError);
+    }
+
+    delete camera;
+}
+
+void tst_QCameraBackend::testCameraStates()
+{
+    QCamera camera;
+    QCameraImageCapture imageCapture(&camera);
+
+    QSignalSpy errorSignal(&camera, SIGNAL(error(QCamera::Error)));
+    QSignalSpy stateChangedSignal(&camera, SIGNAL(stateChanged(QCamera::State)));
+    QSignalSpy statusChangedSignal(&camera, SIGNAL(statusChanged(QCamera::Status)));
+
+    QCOMPARE(camera.state(), QCamera::UnloadedState);
+    QCOMPARE(camera.status(), QCamera::UnloadedStatus);
+
+    camera.load();
+    QCOMPARE(camera.state(), QCamera::LoadedState);
+    QCOMPARE(stateChangedSignal.count(), 1);
+    QCOMPARE(stateChangedSignal.last().first().value<QCamera::State>(), QCamera::LoadedState);
+    QVERIFY(stateChangedSignal.count() > 0);
+
+    QTRY_COMPARE(camera.status(), QCamera::LoadedStatus);
+    QCOMPARE(statusChangedSignal.last().first().value<QCamera::Status>(), QCamera::LoadedStatus);
+
+    camera.unload();
+    QCOMPARE(camera.state(), QCamera::UnloadedState);
+    QCOMPARE(stateChangedSignal.last().first().value<QCamera::State>(), QCamera::UnloadedState);
+    QTRY_COMPARE(camera.status(), QCamera::UnloadedStatus);
+    QCOMPARE(statusChangedSignal.last().first().value<QCamera::Status>(), QCamera::UnloadedStatus);
+
+#ifdef Q_WS_MAEMO_6
+    //resource policy doesn't work correctly when resource is released and immediately requested again.
+    QTest::qWait(250);
+#endif
+
+    camera.start();
+    QCOMPARE(camera.state(), QCamera::ActiveState);
+    QCOMPARE(stateChangedSignal.last().first().value<QCamera::State>(), QCamera::ActiveState);
+    QTRY_COMPARE(camera.status(), QCamera::ActiveStatus);
+    QCOMPARE(statusChangedSignal.last().first().value<QCamera::Status>(), QCamera::ActiveStatus);
+
+    camera.stop();
+    QCOMPARE(camera.state(), QCamera::LoadedState);
+    QCOMPARE(stateChangedSignal.last().first().value<QCamera::State>(), QCamera::LoadedState);
+    QTRY_COMPARE(camera.status(), QCamera::LoadedStatus);
+    QCOMPARE(statusChangedSignal.last().first().value<QCamera::Status>(), QCamera::LoadedStatus);
+
+    camera.unload();
+    QCOMPARE(camera.state(), QCamera::UnloadedState);
+    QCOMPARE(stateChangedSignal.last().first().value<QCamera::State>(), QCamera::UnloadedState);
+    QTRY_COMPARE(camera.status(), QCamera::UnloadedStatus);
+    QCOMPARE(statusChangedSignal.last().first().value<QCamera::Status>(), QCamera::UnloadedStatus);
+
+    QCOMPARE(camera.errorString(), QString());
+    QCOMPARE(errorSignal.count(), 0);
+}
+
+void tst_QCameraBackend::testCaptureMode()
+{
+    QCamera camera;
+
+    QSignalSpy errorSignal(&camera, SIGNAL(error(QCamera::Error)));
+    QSignalSpy stateChangedSignal(&camera, SIGNAL(stateChanged(QCamera::State)));
+    QSignalSpy captureModeSignal(&camera, SIGNAL(captureModeChanged(QCamera::CaptureMode)));
+
+    QCOMPARE(camera.captureMode(), QCamera::CaptureStillImage);
+
+    if (!camera.isCaptureModeSupported(QCamera::CaptureVideo)) {
+        camera.setCaptureMode(QCamera::CaptureVideo);
+        QCOMPARE(camera.captureMode(), QCamera::CaptureStillImage);
+        QSKIP("Video capture not supported", SkipAll);
+    }
+
+    camera.setCaptureMode(QCamera::CaptureVideo);
+    QCOMPARE(camera.captureMode(), QCamera::CaptureVideo);
+    QTRY_COMPARE(captureModeSignal.size(), 1);
+    QCOMPARE(captureModeSignal.last().first().value<QCamera::CaptureMode>(), QCamera::CaptureVideo);
+    captureModeSignal.clear();
+
+    camera.load();
+    QTRY_COMPARE(camera.status(), QCamera::LoadedStatus);
+    //capture mode should still be video
+    QCOMPARE(camera.captureMode(), QCamera::CaptureVideo);
+
+    //it should be possible to switch capture mode in Loaded state
+    camera.setCaptureMode(QCamera::CaptureStillImage);
+    QTRY_COMPARE(captureModeSignal.size(), 1);
+    QCOMPARE(captureModeSignal.last().first().value<QCamera::CaptureMode>(), QCamera::CaptureStillImage);
+    captureModeSignal.clear();
+
+    camera.setCaptureMode(QCamera::CaptureVideo);
+    QTRY_COMPARE(captureModeSignal.size(), 1);
+    QCOMPARE(captureModeSignal.last().first().value<QCamera::CaptureMode>(), QCamera::CaptureVideo);
+    captureModeSignal.clear();
+
+    camera.start();
+    QTRY_COMPARE(camera.status(), QCamera::ActiveStatus);
+    //capture mode should still be video
+    QCOMPARE(camera.captureMode(), QCamera::CaptureVideo);
+
+    stateChangedSignal.clear();
+    //it should be possible to switch capture mode in Active state
+    camera.setCaptureMode(QCamera::CaptureStillImage);
+    //camera may leave Active status, but should return to Active
+    QTest::qWait(10); //camera may leave Active status async
+    QTRY_COMPARE(camera.status(), QCamera::ActiveStatus);
+    QCOMPARE(camera.captureMode(), QCamera::CaptureStillImage);
+    QVERIFY2(stateChangedSignal.isEmpty(), "camera should not change the state during capture mode changes");
+
+    QCOMPARE(captureModeSignal.size(), 1);
+    QCOMPARE(captureModeSignal.last().first().value<QCamera::CaptureMode>(), QCamera::CaptureStillImage);
+    captureModeSignal.clear();
+
+    camera.setCaptureMode(QCamera::CaptureVideo);
+    //camera may leave Active status, but should return to Active
+    QTest::qWait(10); //camera may leave Active status async
+    QTRY_COMPARE(camera.status(), QCamera::ActiveStatus);
+    QCOMPARE(camera.captureMode(), QCamera::CaptureVideo);
+
+    QVERIFY2(stateChangedSignal.isEmpty(), "camera should not change the state during capture mode changes");
+
+    QCOMPARE(captureModeSignal.size(), 1);
+    QCOMPARE(captureModeSignal.last().first().value<QCamera::CaptureMode>(), QCamera::CaptureVideo);
+    captureModeSignal.clear();
+
+    camera.stop();
+    QCOMPARE(camera.captureMode(), QCamera::CaptureVideo);
+    camera.unload();
+    QCOMPARE(camera.captureMode(), QCamera::CaptureVideo);
+
+    QVERIFY2(errorSignal.isEmpty(), QString("Camera error: %1").arg(camera.errorString()).toLocal8Bit());
+}
+
+void tst_QCameraBackend::testCameraCapture()
+{
+    QCamera camera;
+    QCameraImageCapture imageCapture(&camera);
+    //prevents camera to flash during the test
+    camera.exposure()->setFlashMode(QCameraExposure::FlashOff);
+
+    QVERIFY(!imageCapture.isReadyForCapture());
+
+    QSignalSpy capturedSignal(&imageCapture, SIGNAL(imageCaptured(int,QImage)));
+    QSignalSpy savedSignal(&imageCapture, SIGNAL(imageSaved(int,QString)));
+    QSignalSpy errorSignal(&imageCapture, SIGNAL(error(int, QCameraImageCapture::Error,QString)));
+
+    imageCapture.capture();
+    QTRY_COMPARE(errorSignal.size(), 1);
+    QCOMPARE(imageCapture.error(), QCameraImageCapture::NotReadyError);
+    QCOMPARE(capturedSignal.size(), 0);
+    errorSignal.clear();
+
+    camera.start();
+
+    QTRY_VERIFY(imageCapture.isReadyForCapture());
+    QCOMPARE(camera.status(), QCamera::ActiveStatus);
+    QCOMPARE(errorSignal.size(), 0);
+
+    int id = imageCapture.capture();
+
+    QTRY_VERIFY(!savedSignal.isEmpty());
+
+    QCOMPARE(capturedSignal.size(), 1);
+    QCOMPARE(capturedSignal.last().first().toInt(), id);
+    QCOMPARE(errorSignal.size(), 0);
+    QCOMPARE(imageCapture.error(), QCameraImageCapture::NoError);
+
+    QCOMPARE(savedSignal.last().first().toInt(), id);
+    QString location = savedSignal.last().last().toString();
+    QVERIFY(!location.isEmpty());
+    QVERIFY(QFileInfo(location).exists());
+    QImageReader reader(location);
+    reader.setScaledSize(QSize(320,240));
+    QVERIFY(!reader.read().isNull());
+
+    QFile(location).remove();
+}
+
+
+void tst_QCameraBackend::testCaptureToBuffer()
+{
+    QCamera camera;
+    QCameraImageCapture imageCapture(&camera);
+    camera.exposure()->setFlashMode(QCameraExposure::FlashOff);
+
+    camera.load();
+
+#ifdef Q_WS_MAEMO_6
+    QVERIFY(imageCapture.isCaptureDestinationSupported(QCameraImageCapture::CaptureToBuffer));
+#endif
+
+    if (!imageCapture.isCaptureDestinationSupported(QCameraImageCapture::CaptureToBuffer))
+        QSKIP("Buffer capture not supported", SkipAll);
+
+    QTRY_COMPARE(camera.status(), QCamera::LoadedStatus);
+
+    QCOMPARE(imageCapture.bufferFormat(), QVideoFrame::Format_Jpeg);
+
+    QVERIFY(imageCapture.isCaptureDestinationSupported(QCameraImageCapture::CaptureToFile));
+    QVERIFY(imageCapture.isCaptureDestinationSupported(QCameraImageCapture::CaptureToBuffer));
+    QVERIFY(imageCapture.isCaptureDestinationSupported(
+                QCameraImageCapture::CaptureToBuffer | QCameraImageCapture::CaptureToFile));
+
+    QSignalSpy destinationChangedSignal(&imageCapture, SIGNAL(captureDestinationChanged(QCameraImageCapture::CaptureDestinations)));
+
+    QCOMPARE(imageCapture.captureDestination(), QCameraImageCapture::CaptureToFile);
+    imageCapture.setCaptureDestination(QCameraImageCapture::CaptureToBuffer);
+    QCOMPARE(imageCapture.captureDestination(), QCameraImageCapture::CaptureToBuffer);
+    QCOMPARE(destinationChangedSignal.size(), 1);
+    QCOMPARE(destinationChangedSignal.first().first().value<QCameraImageCapture::CaptureDestinations>(),
+             QCameraImageCapture::CaptureToBuffer);
+
+    QSignalSpy capturedSignal(&imageCapture, SIGNAL(imageCaptured(int,QImage)));
+    QSignalSpy imageAvailableSignal(&imageCapture, SIGNAL(imageAvailable(int,QVideoFrame)));
+    QSignalSpy savedSignal(&imageCapture, SIGNAL(imageSaved(int,QString)));
+    QSignalSpy errorSignal(&imageCapture, SIGNAL(error(int, QCameraImageCapture::Error,QString)));
+
+    camera.start();
+    QTRY_VERIFY(imageCapture.isReadyForCapture());
+
+    int id = imageCapture.capture();
+    QTRY_VERIFY(!imageAvailableSignal.isEmpty());
+
+    QVERIFY(errorSignal.isEmpty());
+    QVERIFY(!capturedSignal.isEmpty());
+    QVERIFY(!imageAvailableSignal.isEmpty());
+
+    QTest::qWait(2000);
+    QVERIFY(savedSignal.isEmpty());
+
+    QCOMPARE(capturedSignal.first().first().toInt(), id);
+    QCOMPARE(imageAvailableSignal.first().first().toInt(), id);
+
+    QVideoFrame frame = imageAvailableSignal.first().last().value<QVideoFrame>();
+    QVERIFY(frame.isValid());
+    QCOMPARE(frame.pixelFormat(), QVideoFrame::Format_Jpeg);
+    QVERIFY(!frame.size().isEmpty());
+    QVERIFY(frame.map(QAbstractVideoBuffer::ReadOnly));
+    QByteArray data((const char *)frame.bits(), frame.mappedBytes());
+    frame.unmap();
+    frame = QVideoFrame();
+
+    QVERIFY(!data.isEmpty());
+    QBuffer buffer;
+    buffer.setData(data);
+    buffer.open(QIODevice::ReadOnly);
+    QImageReader reader(&buffer, "JPG");
+    reader.setScaledSize(QSize(640,480));
+    QImage img(reader.read());
+    QVERIFY(!img.isNull());
+
+    capturedSignal.clear();
+    imageAvailableSignal.clear();
+    savedSignal.clear();
+
+    //Capture to yuv buffer
+#ifdef Q_WS_MAEMO_6
+    QVERIFY(imageCapture.supportedBufferFormats().contains(QVideoFrame::Format_UYVY));
+#endif
+
+    if (imageCapture.supportedBufferFormats().contains(QVideoFrame::Format_UYVY)) {
+        imageCapture.setBufferFormat(QVideoFrame::Format_UYVY);
+        QCOMPARE(imageCapture.bufferFormat(), QVideoFrame::Format_UYVY);
+
+        id = imageCapture.capture();
+        QTRY_VERIFY(!imageAvailableSignal.isEmpty());
+
+        QVERIFY(errorSignal.isEmpty());
+        QVERIFY(!capturedSignal.isEmpty());
+        QVERIFY(!imageAvailableSignal.isEmpty());
+        QVERIFY(savedSignal.isEmpty());
+
+        QTest::qWait(2000);
+        QVERIFY(savedSignal.isEmpty());
+
+        frame = imageAvailableSignal.first().last().value<QVideoFrame>();
+        QVERIFY(frame.isValid());
+
+        qDebug() << frame.pixelFormat();
+        QCOMPARE(frame.pixelFormat(), QVideoFrame::Format_UYVY);
+        QVERIFY(!frame.size().isEmpty());
+        frame = QVideoFrame();
+
+        capturedSignal.clear();
+        imageAvailableSignal.clear();
+        savedSignal.clear();
+
+        imageCapture.setBufferFormat(QVideoFrame::Format_Jpeg);
+        QCOMPARE(imageCapture.bufferFormat(), QVideoFrame::Format_Jpeg);
+    }
+
+    //Try to capture to both buffer and file
+#ifdef Q_WS_MAEMO_6
+    QVERIFY(imageCapture.isCaptureDestinationSupported(QCameraImageCapture::CaptureToBuffer | QCameraImageCapture::CaptureToFile));
+#endif
+    if (imageCapture.isCaptureDestinationSupported(QCameraImageCapture::CaptureToBuffer | QCameraImageCapture::CaptureToFile)) {
+        imageCapture.setCaptureDestination(QCameraImageCapture::CaptureToBuffer | QCameraImageCapture::CaptureToFile);
+
+        int oldId = id;
+        id = imageCapture.capture();
+        QVERIFY(id != oldId);
+        QTRY_VERIFY(!savedSignal.isEmpty());
+
+        QVERIFY(errorSignal.isEmpty());
+        QVERIFY(!capturedSignal.isEmpty());
+        QVERIFY(!imageAvailableSignal.isEmpty());
+        QVERIFY(!savedSignal.isEmpty());
+
+        QCOMPARE(capturedSignal.first().first().toInt(), id);
+        QCOMPARE(imageAvailableSignal.first().first().toInt(), id);
+
+        frame = imageAvailableSignal.first().last().value<QVideoFrame>();
+        QVERIFY(frame.isValid());
+        QCOMPARE(frame.pixelFormat(), QVideoFrame::Format_Jpeg);
+        QVERIFY(!frame.size().isEmpty());
+
+        QString fileName = savedSignal.first().last().toString();
+        QVERIFY(QFileInfo(fileName).exists());
+    }
+}
+
+void tst_QCameraBackend::testCameraCaptureMetadata()
+{
+#ifndef Q_WS_MAEMO_6
+    QSKIP("Capture metadata is supported only on harmattan", SkipAll);
+#endif
+
+    QCamera camera;
+    QCameraImageCapture imageCapture(&camera);
+    camera.exposure()->setFlashMode(QCameraExposure::FlashOff);
+
+    QSignalSpy metadataSignal(&imageCapture, SIGNAL(imageMetadataAvailable(int,QtMultimedia::MetaData,QVariant)));
+    QSignalSpy savedSignal(&imageCapture, SIGNAL(imageSaved(int,QString)));
+
+    camera.start();
+
+    QTRY_VERIFY(imageCapture.isReadyForCapture());
+
+    int id = imageCapture.capture(QString::fromLatin1("/dev/null"));
+    QTRY_VERIFY(!savedSignal.isEmpty());
+    QVERIFY(!metadataSignal.isEmpty());
+    QCOMPARE(metadataSignal.first().first().toInt(), id);
+}
+
+void tst_QCameraBackend::testExposureCompensation()
+{
+#if !defined(Q_WS_MAEMO_6)
+    QSKIP("Capture exposure parameters are supported only on mobile platforms", SkipAll);
+#endif
+
+    QCamera camera;
+    QCameraExposure *exposure = camera.exposure();
+
+    QSignalSpy exposureCompensationSignal(exposure, SIGNAL(exposureCompensationChanged(qreal)));
+
+    //it should be possible to set exposure parameters in Unloaded state
+    QCOMPARE(exposure->exposureCompensation()+1.0, 1.0);
+    exposure->setExposureCompensation(1.0);
+    QCOMPARE(exposure->exposureCompensation(), 1.0);
+    QTRY_COMPARE(exposureCompensationSignal.count(), 1);
+    QCOMPARE(exposureCompensationSignal.last().first().toReal(), 1.0);
+
+    //exposureCompensationChanged should not be emitted when value is not changed
+    exposure->setExposureCompensation(1.0);
+    QTest::qWait(50);
+    QCOMPARE(exposureCompensationSignal.count(), 1);
+
+    //exposure compensation should be preserved during load/start
+    camera.load();
+    QTRY_COMPARE(camera.status(), QCamera::LoadedStatus);
+
+    QCOMPARE(exposure->exposureCompensation(), 1.0);
+
+    exposureCompensationSignal.clear();
+    exposure->setExposureCompensation(-1.0);
+    QCOMPARE(exposure->exposureCompensation(), -1.0);
+    QTRY_COMPARE(exposureCompensationSignal.count(), 1);
+    QCOMPARE(exposureCompensationSignal.last().first().toReal(), -1.0);
+
+    camera.start();
+    QTRY_COMPARE(camera.status(), QCamera::ActiveStatus);
+
+    QCOMPARE(exposure->exposureCompensation(), -1.0);
+
+    exposureCompensationSignal.clear();
+    exposure->setExposureCompensation(1.0);
+    QCOMPARE(exposure->exposureCompensation(), 1.0);
+    QTRY_COMPARE(exposureCompensationSignal.count(), 1);
+    QCOMPARE(exposureCompensationSignal.last().first().toReal(), 1.0);
+}
+
+void tst_QCameraBackend::testExposureMode()
+{
+#if !defined(Q_WS_MAEMO_6)
+    QSKIP("Capture exposure parameters are supported only on mobile platforms", SkipAll);
+#endif
+
+    QCamera camera;
+    QCameraExposure *exposure = camera.exposure();
+
+#ifdef Q_WS_MAEMO_6
+    QEXPECT_FAIL("", "Camerabin reports Manual exposure instead of Auto", Continue);
+#endif
+    QCOMPARE(exposure->exposureMode(), QCameraExposure::ExposureAuto);
+
+    // Night
+    exposure->setExposureMode(QCameraExposure::ExposureNight);
+    QCOMPARE(exposure->exposureMode(), QCameraExposure::ExposureNight);
+    camera.start();
+    QTRY_COMPARE(camera.status(), QCamera::ActiveStatus);
+    QCOMPARE(exposure->exposureMode(), QCameraExposure::ExposureNight);
+
+    camera.unload();
+    QTRY_COMPARE(camera.status(), QCamera::UnloadedStatus);
+
+#ifdef Q_WS_MAEMO_6
+    //resource policy doesn't work correctly when resource is released and immediately requested again.
+    QTest::qWait(250);
+#endif
+
+    // Auto
+    exposure->setExposureMode(QCameraExposure::ExposureAuto);
+    QCOMPARE(exposure->exposureMode(), QCameraExposure::ExposureAuto);
+    camera.start();
+    QTRY_COMPARE(camera.status(), QCamera::ActiveStatus);
+    QCOMPARE(exposure->exposureMode(), QCameraExposure::ExposureAuto);
+}
+
+QTEST_MAIN(tst_QCameraBackend)
+
+#include "tst_qcamerabackend.moc"