Add a unit test for comphelper's guards

Change-Id: Ia9a9c5694d3982a87b720071b74220d572ef1a78
Reviewed-on: https://gerrit.libreoffice.org/71355
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

comphelper/CppunitTest_comphelper_test.mk

@@ -15,6 +15,7 @@ $(eval $(call gb_CppunitTest_add_exception_objects,comphelper_test, \
     comphelper/qa/unit/test_hash \
     comphelper/qa/unit/base64_test \
     comphelper/qa/unit/types_test \
+    comphelper/qa/unit/test_guards \
 ))
 
 $(eval $(call gb_CppunitTest_use_sdk_api,comphelper_test))

comphelper/qa/unit/test_guards.cxx

+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <sal/types.h>
+#include <comphelper/flagguard.hxx>
+#include <unotest/bootstrapfixturebase.hxx>
+
+CPPUNIT_TEST_FIXTURE(CppUnit::TestFixture, test_comphelperGuards)
+{
+    bool bFlag = true;
+    {
+        // Test that comphelper::ScopeGuard executes its parameter on destruction
+        comphelper::ScopeGuard aGuard([&bFlag] { bFlag = false; });
+        CPPUNIT_ASSERT(bFlag);
+    }
+    CPPUNIT_ASSERT(!bFlag);
+
+    {
+        // Test that comphelper::FlagGuard properly sets and resets the flag
+        comphelper::FlagGuard aGuard(bFlag);
+        CPPUNIT_ASSERT(bFlag);
+    }
+    CPPUNIT_ASSERT(!bFlag);
+
+    bFlag = true;
+    {
+        // Test that comphelper::FlagGuard properly sets and resets the flag
+        comphelper::FlagGuard aGuard(bFlag);
+        CPPUNIT_ASSERT(bFlag);
+    }
+    // comphelper::FlagGuard must reset flag to false on destruction unconditionally
+    CPPUNIT_ASSERT(!bFlag);
+
+    {
+        // Test that comphelper::FlagRestorationGuard properly sets and resets the flag
+        comphelper::FlagRestorationGuard aGuard(bFlag, true);
+        CPPUNIT_ASSERT(bFlag);
+    }
+    CPPUNIT_ASSERT(!bFlag);
+
+    bFlag = true;
+    {
+        // Test that comphelper::FlagRestorationGuard properly sets and resets the flag
+        comphelper::FlagRestorationGuard aGuard(bFlag, false);
+        CPPUNIT_ASSERT(!bFlag);
+    }
+    // comphelper::FlagGuard must reset flag to initial state on destruction
+    CPPUNIT_ASSERT(bFlag);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */