QDir fix issues with (shared) cached lists

With 2964718224c0ed356511335742368d4fc421c6bd, QDir started really using
the cached file lists. However, these were not being properly updated on
setNameFilters, setFilter and setSorting.

QDir::refresh, on the other hand, would invalidate the lists without
first detaching, thus breaking the copy-on-write promise.

Summarizing, shared data must be detached and cached lists invalidated,
so they get regenerated.

Reviewed-by: Olivier Goffart
Reviewed-by: Ritt Konstantin

1 files changed, 97 insertions, 0 deletions

diff --git a/tests/shared/filesystem.h b/tests/shared/filesystem.h
new file mode 100644
index 0000000..2d46c0d
--- /dev/null
+++ b/tests/shared/filesystem.h
@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+// Helper functions for creating file-system hierarchies and cleaning up.
+
+#ifndef QT_TESTS_SHARED_FILESYSTEM_H_INCLUDED
+#define QT_TESTS_SHARED_FILESYSTEM_H_INCLUDED
+
+#include <QString>
+#include <QStringList>
+#include <QDir>
+#include <QFile>
+
+struct FileSystem
+{
+    ~FileSystem()
+    {
+        Q_FOREACH(QString fileName, createdFiles)
+            QFile::remove(fileName);
+
+        Q_FOREACH(QString dirName, createdDirectories)
+            currentDir.rmdir(dirName);
+    }
+
+    bool createDirectory(const QString &dirName)
+    {
+        if (currentDir.mkdir(dirName)) {
+            createdDirectories.prepend(dirName);
+            return true;
+        }
+        return false;
+    }
+
+    bool createFile(const QString &fileName)
+    {
+        QFile file(fileName);
+        if (file.open(QIODevice::WriteOnly)) {
+            createdFiles << fileName;
+            return true;
+        }
+        return false;
+    }
+
+    bool createLink(const QString &destination, const QString &linkName)
+    {
+        if (QFile::link(destination, linkName)) {
+            createdFiles << linkName;
+            return true;
+        }
+        return false;
+    }
+
+private:
+    QDir currentDir;
+
+    QStringList createdDirectories;
+    QStringList createdFiles;
+};
+
+#endif // include guard