From 9229452e574e603aa86fd5adb28da33cf5879db9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9rgio=20Martins?= <sergio.martins@kdab.com>
Date: Sun, 24 Sep 2017 20:45:09 +0100
Subject: Introduce QScopeGuard

A RAII style class which calls a function at end of scope.

Example usage:
    auto cleanup = qScopeGuard([] { <my cleanup code> ; });

[ChangeLog][QtCore] Introduced QScopeGuard.

Task-number: QTBUG-62894
Change-Id: Ife67f5c76255a1fafbae03367263da0bac9a0070
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
---
 .../auto/corelib/tools/qscopeguard/qscopeguard.pro |  4 +
 .../corelib/tools/qscopeguard/tst_qscopeguard.cpp  | 85 ++++++++++++++++++++++
 2 files changed, 89 insertions(+)
 create mode 100644 tests/auto/corelib/tools/qscopeguard/qscopeguard.pro
 create mode 100644 tests/auto/corelib/tools/qscopeguard/tst_qscopeguard.cpp

(limited to 'tests/auto')

diff --git a/tests/auto/corelib/tools/qscopeguard/qscopeguard.pro b/tests/auto/corelib/tools/qscopeguard/qscopeguard.pro
new file mode 100644
index 0000000000..070d4b077c
--- /dev/null
+++ b/tests/auto/corelib/tools/qscopeguard/qscopeguard.pro
@@ -0,0 +1,4 @@
+CONFIG += testcase
+TARGET = tst_qscopeguard
+QT = core testlib
+SOURCES = tst_qscopeguard.cpp
diff --git a/tests/auto/corelib/tools/qscopeguard/tst_qscopeguard.cpp b/tests/auto/corelib/tools/qscopeguard/tst_qscopeguard.cpp
new file mode 100644
index 0000000000..f95d48f042
--- /dev/null
+++ b/tests/auto/corelib/tools/qscopeguard/tst_qscopeguard.cpp
@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Sérgio Martins <sergio.martins@kdab.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include <QtCore/QScopeGuard>
+
+/*!
+ \class tst_QScopedGuard
+ \internal
+ \since 5.11
+ \brief Tests class QScopedCleanup and function qScopeGuard
+
+ */
+class tst_QScopedGuard : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void leavingScope();
+    void exceptions();
+};
+
+static int s_globalState = 0;
+
+void tst_QScopedGuard::leavingScope()
+{
+    auto cleanup = qScopeGuard([] { s_globalState++; QCOMPARE(s_globalState, 3); });
+    QCOMPARE(s_globalState, 0);
+
+    {
+        auto cleanup = qScopeGuard([] { s_globalState++; });
+        QCOMPARE(s_globalState, 0);
+    }
+
+    QCOMPARE(s_globalState, 1);
+    s_globalState++;
+}
+
+void tst_QScopedGuard::exceptions()
+{
+    s_globalState = 0;
+    bool caught = false;
+    QT_TRY
+    {
+        auto cleanup = qScopeGuard([&caught] { s_globalState++; });
+        QT_THROW(std::bad_alloc()); //if Qt compiled without exceptions this is noop
+        s_globalState = 100;
+    }
+    QT_CATCH(...)
+    {
+        caught = true;
+        QCOMPARE(s_globalState, 1);
+    }
+
+    QVERIFY((caught && s_globalState == 1) || (!caught && s_globalState == 101));
+
+}
+
+QTEST_MAIN(tst_QScopedGuard)
+#include "tst_qscopeguard.moc"
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