1 files changed, 148 insertions, 0 deletions
diff --git a/tests/auto/gui/text/qfontcache/tst_qfontcache.cpp b/tests/auto/gui/text/qfontcache/tst_qfontcache.cpp
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+++ b/tests/auto/gui/text/qfontcache/tst_qfontcache.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+
+
+#include <qfont.h>
+#include <private/qfont_p.h>
+#include <private/qfontengine_p.h>
+
+class tst_QFontCache : public QObject
+{
+Q_OBJECT
+
+public:
+    tst_QFontCache();
+    virtual ~tst_QFontCache();
+
+private slots:
+    void clear();
+};
+
+QT_BEGIN_NAMESPACE
+extern void qt_setQtEnableTestFont(bool value); // qfontdatabase.cpp
+
+#ifdef QT_BUILD_INTERNAL
+// qfontengine.cpp
+extern void QFontEngine_startCollectingEngines();
+extern QList<QFontEngine *> QFontEngine_stopCollectingEngines();
+#endif
+QT_END_NAMESPACE
+
+tst_QFontCache::tst_QFontCache()
+{
+}
+
+tst_QFontCache::~tst_QFontCache()
+{
+}
+
+void tst_QFontCache::clear()
+{
+#ifdef QT_BUILD_INTERNAL
+    QFontEngine_startCollectingEngines();
+#else
+    // must not crash, at very least ;)
+#endif
+
+    QFontEngine *fontEngine = 0;
+
+    {
+        // we're never caching the box (and the "test") font engines
+        // let's ensure we're not leaking them as well as the cached ones
+        qt_setQtEnableTestFont(true);
+
+        QFont f;
+        f.setFamily("__Qt__Box__Engine__");
+        f.exactMatch(); // loads engine
+    }
+    {
+        QFontDatabase db;
+
+        QFont f;
+        f.setStyleHint(QFont::Serif);
+        const QString familyForHint(f.defaultFamily());
+
+        // it should at least return a family that is available
+        QVERIFY(db.hasFamily(familyForHint));
+        f.exactMatch(); // loads engine
+
+        fontEngine = QFontPrivate::get(f)->engineForScript(QChar::Script_Common);
+        QVERIFY(fontEngine);
+        QVERIFY(QFontCache::instance()->engineCacheCount.value(fontEngine) > 0); // ensure it is cached
+
+        // acquire the engine to use it somewhere else:
+        // (e.g. like the we do in QFontSubset() or like QRawFont does in fromFont())
+        fontEngine->ref.ref();
+
+        // cache the engine once again; there is a special case when the engine is cached more than once
+        QFontCache::instance()->insertEngine(QFontCache::Key(QFontDef(), 0, 0), fontEngine);
+    }
+
+    // use it:
+    // e.g. fontEngine->stringToCMap(..);
+
+    // and whilst it is alive, don't hesitate to add/remove the app-local fonts:
+    // (QFontDatabase::{add,remove}ApplicationFont() clears the cache)
+    QFontCache::instance()->clear();
+
+    // release the acquired engine:
+    if (fontEngine) {
+        if (!fontEngine->ref.deref())
+            delete fontEngine;
+        fontEngine = 0;
+    }
+
+    // we may even exit the application now:
+    QFontCache::instance()->cleanup();
+
+#ifdef QT_BUILD_INTERNAL
+    QList<QFontEngine *> leakedEngines = QFontEngine_stopCollectingEngines();
+for (int i = 0; i < leakedEngines.size(); ++i) qWarning() << i << leakedEngines.at(i) << leakedEngines.at(i)->ref.load();
+    // and we are not leaking!
+    QCOMPARE(leakedEngines.size(), 0);
+#endif
+}
+
+QTEST_MAIN(tst_QFontCache)
+#include "tst_qfontcache.moc"