Fix tests on Windows

tests/util/TemporaryFile.cpp

@@ -0,0 +1,55 @@
+/*
+ *  Copyright (C) 2018 KeePassXC Team <team@keepassxc.org>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "TemporaryFile.h"
+
+#ifdef Q_OS_WIN
+
+TemporaryFile::TemporaryFile()
+    : TemporaryFile(nullptr)
+{
+}
+
+TemporaryFile::TemporaryFile(const QString& templateName)
+    : TemporaryFile(templateName, nullptr)
+{
+}
+
+TemporaryFile::TemporaryFile(QObject* parent)
+    : QFile(parent)
+{
+    QTemporaryFile tmp;
+    tmp.open();
+    QFile::setFileName(tmp.fileName());
+    tmp.close();
+}
+
+TemporaryFile::TemporaryFile(const QString& templateName, QObject* parent)
+    : QFile(parent)
+{
+    QTemporaryFile tmp(templateName);
+    tmp.open();
+    QFile::setFileName(tmp.fileName());
+    tmp.close();
+}
+
+bool TemporaryFile::open()
+{
+    return QFile::open(QIODevice::ReadWrite);
+}
+
+#endif