Improve video test coverage and debugging output.

Added a few debug operators for some useful enums, and
added tests for them.  One or two other features not really
tested.

Change-Id: Idffec6ade1d4e05dbf72f3dc47dfc0d01ddddf8b
Reviewed-on: http://codereview.qt-project.org/6201
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>

src/multimedia/video/qabstractvideobuffer.cpp

@@ -43,6 +43,9 @@
 
 #include <qvariant.h>
 
+#include <QDebug>
+
+
 QT_BEGIN_NAMESPACE
 
 /*!
@@ -198,5 +201,24 @@ QVariant QAbstractVideoBuffer::handle() const
     return QVariant();
 }
 
+#ifndef QT_NO_DEBUG_STREAM
+QDebug operator<<(QDebug dbg, QAbstractVideoBuffer::HandleType type)
+{
+    switch (type) {
+    case QAbstractVideoBuffer::NoHandle:
+        return dbg.nospace() << "NoHandle";
+    case QAbstractVideoBuffer::GLTextureHandle:
+        return dbg.nospace() << "GLTextureHandle";
+    case QAbstractVideoBuffer::XvShmImageHandle:
+        return dbg.nospace() << "XvShmImageHandle";
+    case QAbstractVideoBuffer::CoreImageHandle:
+        return dbg.nospace() << "CoreImageHandle";
+    case QAbstractVideoBuffer::QPixmapHandle:
+        return dbg.nospace() << "QPixmapHandle";
+    default:
+        return dbg.nospace() << QString(QLatin1String("UserHandle(%1)")).arg(int(type)).toAscii().constData();
+    }
+}
+#endif
 
 QT_END_NAMESPACE