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/****************************************************************************
**
** Copyright (C) 2013 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>
class tst_QFlags: public QObject
{
Q_OBJECT
private slots:
void testFlag() const;
void testFlagZeroFlag() const;
void testFlagMultiBits() const;
void constExpr();
void signedness();
};
void tst_QFlags::testFlag() const
{
Qt::MouseButtons btn = Qt::LeftButton | Qt::RightButton;
QVERIFY(btn.testFlag(Qt::LeftButton));
QVERIFY(!btn.testFlag(Qt::MidButton));
btn = 0;
QVERIFY(!btn.testFlag(Qt::LeftButton));
}
void tst_QFlags::testFlagZeroFlag() const
{
{
Qt::MouseButtons btn = Qt::LeftButton | Qt::RightButton;
/* Qt::NoButton has the value 0. */
QVERIFY(!btn.testFlag(Qt::NoButton));
}
{
/* A zero enum set should test true with zero. */
QVERIFY(Qt::MouseButtons().testFlag(Qt::NoButton));
}
{
Qt::MouseButtons btn = Qt::NoButton;
QVERIFY(btn.testFlag(Qt::NoButton));
}
}
void tst_QFlags::testFlagMultiBits() const
{
/* Qt::Window is 0x00000001
* Qt::Dialog is 0x00000002 | Window
*/
{
const Qt::WindowFlags onlyWindow(Qt::Window);
QVERIFY(!onlyWindow.testFlag(Qt::Dialog));
}
{
const Qt::WindowFlags hasDialog(Qt::Dialog);
QVERIFY(hasDialog.testFlag(Qt::Dialog));
}
}
template <int N, typename T> bool verifyConstExpr(T n) { return n == N; }
void tst_QFlags::constExpr()
{
#ifdef Q_COMPILER_CONSTEXPR
Qt::MouseButtons btn = Qt::LeftButton | Qt::RightButton;
switch (btn) {
case Qt::LeftButton: QVERIFY(false); break;
case Qt::RightButton: QVERIFY(false); break;
case int(Qt::LeftButton | Qt::RightButton): QVERIFY(true); break;
default: QVERIFY(false);
}
QVERIFY(verifyConstExpr<(Qt::LeftButton | Qt::RightButton) & Qt::LeftButton>(Qt::LeftButton));
QVERIFY(verifyConstExpr<(Qt::LeftButton | Qt::RightButton) & Qt::MiddleButton>(0));
QVERIFY(verifyConstExpr<(Qt::LeftButton | Qt::RightButton) | Qt::MiddleButton>(Qt::LeftButton | Qt::RightButton | Qt::MiddleButton));
QVERIFY(verifyConstExpr<~(Qt::LeftButton | Qt::RightButton)>(~(Qt::LeftButton | Qt::RightButton)));
QVERIFY(verifyConstExpr<Qt::MouseButtons(Qt::LeftButton) ^ Qt::RightButton>(Qt::LeftButton ^ Qt::RightButton));
QVERIFY(verifyConstExpr<Qt::MouseButtons(0)>(0));
QVERIFY(verifyConstExpr<Qt::MouseButtons(Qt::RightButton) & 0xff>(Qt::RightButton));
QVERIFY(verifyConstExpr<Qt::MouseButtons(Qt::RightButton) | 0xff>(0xff));
QVERIFY(!verifyConstExpr<Qt::RightButton>(!Qt::MouseButtons(Qt::LeftButton)));
#endif
}
void tst_QFlags::signedness()
{
// these are all 'true' on GCC, but since the std says the
// underlying type is implementation-defined, we need to allow for
// a different signedness, so we only check that the relative
// signedness of the types matches:
Q_STATIC_ASSERT((QtPrivate::is_unsigned<Qt::MouseButton>::value ==
QtPrivate::is_unsigned<Qt::MouseButtons::Int>::value));
Q_STATIC_ASSERT((QtPrivate::is_signed<Qt::AlignmentFlag>::value ==
QtPrivate::is_signed<Qt::Alignment::Int>::value));
}
// (statically) check QTypeInfo for QFlags instantiations:
enum MyEnum { Zero, One, Two, Four=4 };
Q_DECLARE_FLAGS( MyFlags, MyEnum )
Q_DECLARE_OPERATORS_FOR_FLAGS( MyFlags )
Q_STATIC_ASSERT( !QTypeInfo<MyFlags>::isComplex );
Q_STATIC_ASSERT( !QTypeInfo<MyFlags>::isStatic );
Q_STATIC_ASSERT( !QTypeInfo<MyFlags>::isLarge );
Q_STATIC_ASSERT( !QTypeInfo<MyFlags>::isPointer );
QTEST_MAIN(tst_QFlags)
#include "tst_qflags.moc"
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