| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** 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 |
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| ** |
| ** GNU General Public License Usage |
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| ** 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 |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| |
| #include <QtTest/QtTest> |
| #include <QtCore/QSharedData> |
| |
| /*! |
| \class tst_QExplicitlySharedDataPointer |
| \internal |
| \since 4.4 |
| \brief Tests class QExplicitlySharedDataPointer. |
| |
| */ |
| class tst_QExplicitlySharedDataPointer : public QObject |
| { |
| Q_OBJECT |
| |
| private Q_SLOTS: |
| void pointerOperatorOnConst() const; |
| void pointerOperatorOnMutable() const; |
| void copyConstructor() const; |
| void clone() const; |
| void data() const; |
| void reset() const; |
| void swap() const; |
| }; |
| |
| class MyClass : public QSharedData |
| { |
| public: |
| void mutating() |
| { |
| } |
| |
| void notMutating() const |
| { |
| } |
| |
| MyClass &operator=(const MyClass &) |
| { |
| return *this; |
| } |
| }; |
| |
| class Base : public QSharedData |
| { |
| public: |
| virtual ~Base() { } |
| virtual Base *clone() { return new Base(*this); } |
| virtual bool isBase() const { return true; } |
| }; |
| |
| class Derived : public Base |
| { |
| public: |
| virtual Base *clone() { return new Derived(*this); } |
| virtual bool isBase() const { return false; } |
| }; |
| |
| QT_BEGIN_NAMESPACE |
| template<> Base *QExplicitlySharedDataPointer<Base>::clone() |
| { |
| return d->clone(); |
| } |
| QT_END_NAMESPACE |
| |
| void tst_QExplicitlySharedDataPointer::pointerOperatorOnConst() const |
| { |
| /* Pointer itself is const. */ |
| { |
| const QExplicitlySharedDataPointer<const MyClass> pointer(new MyClass()); |
| pointer->notMutating(); |
| } |
| |
| /* Pointer itself is mutable. */ |
| { |
| QExplicitlySharedDataPointer<const MyClass> pointer(new MyClass()); |
| pointer->notMutating(); |
| } |
| } |
| |
| void tst_QExplicitlySharedDataPointer::pointerOperatorOnMutable() const |
| { |
| /* Pointer itself is const. */ |
| { |
| const QExplicitlySharedDataPointer<MyClass> pointer(new MyClass()); |
| pointer->notMutating(); |
| pointer->mutating(); |
| *pointer = MyClass(); |
| } |
| |
| /* Pointer itself is mutable. */ |
| { |
| const QExplicitlySharedDataPointer<MyClass> pointer(new MyClass()); |
| pointer->notMutating(); |
| pointer->mutating(); |
| *pointer = MyClass(); |
| } |
| } |
| |
| void tst_QExplicitlySharedDataPointer::copyConstructor() const |
| { |
| const QExplicitlySharedDataPointer<const MyClass> pointer(new MyClass()); |
| const QExplicitlySharedDataPointer<const MyClass> copy(pointer); |
| } |
| |
| void tst_QExplicitlySharedDataPointer::clone() const |
| { |
| /* holding a base element */ |
| { |
| QExplicitlySharedDataPointer<Base> pointer(new Base); |
| QVERIFY(pointer->isBase()); |
| |
| QExplicitlySharedDataPointer<Base> copy(pointer); |
| pointer.detach(); |
| QVERIFY(pointer->isBase()); |
| } |
| |
| /* holding a derived element */ |
| { |
| QExplicitlySharedDataPointer<Base> pointer(new Derived); |
| QVERIFY(!pointer->isBase()); |
| |
| QExplicitlySharedDataPointer<Base> copy(pointer); |
| pointer.detach(); |
| QVERIFY(!pointer->isBase()); |
| } |
| } |
| |
| void tst_QExplicitlySharedDataPointer::data() const |
| { |
| /* Check default value. */ |
| { |
| QExplicitlySharedDataPointer<const MyClass> pointer; |
| QCOMPARE(pointer.data(), static_cast<const MyClass *>(0)); |
| QVERIFY(pointer == nullptr); |
| QVERIFY(nullptr == pointer); |
| } |
| |
| /* On const pointer. Must not mutate the pointer. */ |
| { |
| const QExplicitlySharedDataPointer<const MyClass> pointer(new MyClass()); |
| pointer.data(); |
| |
| /* Check that this cast is possible. */ |
| static_cast<const MyClass *>(pointer.data()); |
| |
| QVERIFY(! (pointer == nullptr)); |
| QVERIFY(! (nullptr == pointer)); |
| } |
| |
| /* On mutatable pointer. Must not mutate the pointer. */ |
| { |
| QExplicitlySharedDataPointer<const MyClass> pointer(new MyClass()); |
| pointer.data(); |
| |
| /* Check that this cast is possible. */ |
| static_cast<const MyClass *>(pointer.data()); |
| } |
| |
| /* Must not mutate the pointer. */ |
| { |
| const QExplicitlySharedDataPointer<MyClass> pointer(new MyClass()); |
| pointer.data(); |
| |
| /* Check that these casts are possible. */ |
| static_cast<MyClass *>(pointer.data()); |
| static_cast<const MyClass *>(pointer.data()); |
| } |
| |
| /* Must not mutate the pointer. */ |
| { |
| QExplicitlySharedDataPointer<MyClass> pointer(new MyClass()); |
| pointer.data(); |
| |
| /* Check that these casts are possible. */ |
| static_cast<MyClass *>(pointer.data()); |
| static_cast<const MyClass *>(pointer.data()); |
| } |
| } |
| |
| void tst_QExplicitlySharedDataPointer::reset() const |
| { |
| /* Do reset on a single ref count. */ |
| { |
| QExplicitlySharedDataPointer<MyClass> pointer(new MyClass()); |
| QVERIFY(pointer.data() != 0); |
| |
| pointer.reset(); |
| QCOMPARE(pointer.data(), static_cast<MyClass *>(0)); |
| } |
| |
| /* Do reset on a default constructed object. */ |
| { |
| QExplicitlySharedDataPointer<MyClass> pointer; |
| QCOMPARE(pointer.data(), static_cast<MyClass *>(0)); |
| |
| pointer.reset(); |
| QCOMPARE(pointer.data(), static_cast<MyClass *>(0)); |
| } |
| } |
| |
| void tst_QExplicitlySharedDataPointer::swap() const |
| { |
| QExplicitlySharedDataPointer<MyClass> p1(0), p2(new MyClass()); |
| QVERIFY(!p1.data()); |
| QVERIFY(p2.data()); |
| |
| p1.swap(p2); |
| QVERIFY(p1.data()); |
| QVERIFY(!p2.data()); |
| |
| p1.swap(p2); |
| QVERIFY(!p1.data()); |
| QVERIFY(p2.data()); |
| |
| qSwap(p1, p2); |
| QVERIFY(p1.data()); |
| QVERIFY(!p2.data()); |
| } |
| |
| QTEST_MAIN(tst_QExplicitlySharedDataPointer) |
| |
| #include "tst_qexplicitlyshareddatapointer.moc" |
| // vim: et:ts=4:sw=4:sts=4 |