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    41 

    42 #include <QtTest/QtTest>

    43 #include <QtCore/QScopedPointer>

    44 

    45 /*!

    46  \class tst_QScopedPointer

    47  \internal

    48  \since 4.6

    49  \brief Tests class QScopedPointer.

    50 

    51  */

    52 class tst_QScopedPointer : public QObject

    53 {

    54     Q_OBJECT

    55 

    56 private Q_SLOTS:

    57     void defaultConstructor();

    58     void dataOnDefaultConstructed();

    59     void useSubClassInConstructor();

    60     void dataOnValue();

    61     void dataSignature();

    62     void reset();

    63     void dereferenceOperator();

    64     void dereferenceOperatorSignature();

    65     void pointerOperator();

    66     void pointerOperatorSignature();

    67     void negationOperator();

    68     void negationOperatorSignature();

    69     void operatorBool();

    70     void operatorBoolSignature();

    71     void isNull();

    72     void isNullSignature();

    73     void objectSize();

    74     void comparison();

    75     // TODO instanciate on const object

    76 };

    77 

    78 void tst_QScopedPointer::defaultConstructor()

    79 {

    80     /* Check that the members, one, is correctly initialized. */

    81     QScopedPointer<int> p;

    82     QCOMPARE(p.data(), static_cast<int *>(0));

    83 }

    84 

    85 void tst_QScopedPointer::dataOnDefaultConstructed()

    86 {

    87     QScopedPointer<int> p;

    88 

    89     QCOMPARE(p.data(), static_cast<int *>(0));

    90 }

    91 

    92 class MyClass

    93 {

    94 };

    95 

    96 class MySubClass : public MyClass

    97 {

    98 };

    99 

   100 void tst_QScopedPointer::useSubClassInConstructor()

   101 {

   102     /* Use a syntax which users typically would do. */

   103     QScopedPointer<MyClass> p(new MyClass());

   104 }

   105 

   106 void tst_QScopedPointer::dataOnValue()

   107 {

   108     int *const rawPointer = new int(5);

   109     QScopedPointer<int> p(rawPointer);

   110 

   111     QCOMPARE(p.data(), rawPointer);

   112 }

   113 

   114 void tst_QScopedPointer::dataSignature()

   115 {

   116     const QScopedPointer<int> p;

   117     /* data() should be const. */

   118     p.data();

   119 }

   120 

   121 void tst_QScopedPointer::reset()

   122 {

   123     /* Call reset() on a default constructed value. */

   124     {

   125         QScopedPointer<int> p;

   126         p.reset();

   127         QCOMPARE(p.data(), static_cast<int *>(0));

   128     }

   129 

   130     /* Call reset() on an active value. */

   131     {

   132         QScopedPointer<int> p(new int(3));

   133         p.reset();

   134         QCOMPARE(p.data(), static_cast<int *>(0));

   135     }

   136 

   137     /* Call reset() with a value, on an active value. */

   138     {

   139         QScopedPointer<int> p(new int(3));

   140 

   141         int *const value = new int(9);

   142         p.reset(value);

   143         QCOMPARE(*p.data(), 9);

   144     }

   145 

   146     /* Call reset() with a value, on default constructed value. */

   147     {

   148         QScopedPointer<int> p;

   149 

   150         int *const value = new int(9);

   151         p.reset(value);

   152         QCOMPARE(*p.data(), 9);

   153     }

   154 }

   155 

   156 class AbstractClass

   157 {

   158 public:

   159     virtual ~AbstractClass()

   160     {

   161     }

   162 

   163     virtual int member() const = 0;

   164 };

   165 

   166 class SubClass : public AbstractClass

   167 {

   168 public:

   169     virtual int member() const

   170     {

   171         return 5;

   172     }

   173 };

   174 

   175 void tst_QScopedPointer::dereferenceOperator()

   176 {

   177     /* Dereference a basic value. */

   178     {

   179         QScopedPointer<int> p(new int(5));

   180 

   181         const int value2 = *p;

   182         QCOMPARE(value2, 5);

   183     }

   184 

   185     /* Dereference a pointer to an abstract class. This verifies

   186      * that the operator returns a reference, when compiling

   187      * with MSVC 2005. */

   188     {

   189         QScopedPointer<AbstractClass> p(new SubClass());

   190 

   191         QCOMPARE((*p).member(), 5);

   192     }

   193 }

   194 

   195 void tst_QScopedPointer::dereferenceOperatorSignature()

   196 {

   197     /* The operator should be const. */

   198     {

   199         const QScopedPointer<int> p(new int(5));

   200         *p;

   201     }

   202 

   203     /* A reference should be returned, not a value. */

   204     {

   205         const QScopedPointer<int> p(new int(5));

   206         Q_UNUSED(static_cast<int &>(*p));

   207     }

   208 

   209     /* Instantiated on a const object, the returned object is a const reference. */

   210     {

   211         const QScopedPointer<const int> p(new int(5));

   212         Q_UNUSED(static_cast<const int &>(*p));

   213     }

   214 }

   215 

   216 class AnyForm

   217 {

   218 public:

   219     int value;

   220 };

   221 

   222 void tst_QScopedPointer::pointerOperator()

   223 {

   224     QScopedPointer<AnyForm> p(new AnyForm());

   225     p->value = 5;

   226 

   227     QCOMPARE(p->value, 5);

   228 }

   229 

   230 void tst_QScopedPointer::pointerOperatorSignature()

   231 {

   232     /* The operator should be const. */

   233     const QScopedPointer<AnyForm> p(new AnyForm);

   234     p->value = 5;

   235 

   236     QVERIFY(p->value);

   237 }

   238 

   239 void tst_QScopedPointer::negationOperator()

   240 {

   241     /* Invoke on default constructed value. */

   242     {

   243         QScopedPointer<int> p;

   244         QVERIFY(!p);

   245     }

   246 

   247     /* Invoke on a value. */

   248     {

   249         QScopedPointer<int> p(new int(2));

   250         QCOMPARE(!p, false);

   251     }

   252 }

   253 

   254 void tst_QScopedPointer::negationOperatorSignature()

   255 {

   256     /* The signature should be const. */

   257     const QScopedPointer<int> p;

   258     !p;

   259 

   260     /* The return value should be bool. */

   261     static_cast<bool>(!p);

   262 }

   263 

   264 void tst_QScopedPointer::operatorBool()

   265 {

   266     /* Invoke on default constructed value. */

   267     {

   268         QScopedPointer<int> p;

   269         QCOMPARE(bool(p), false);

   270     }

   271 

   272     /* Invoke on active value. */

   273     {

   274         QScopedPointer<int> p(new int(3));

   275         QVERIFY(p);

   276     }

   277 }

   278 

   279 void tst_QScopedPointer::operatorBoolSignature()

   280 {

   281     /* The signature should be const and return bool. */

   282     const QScopedPointer<int> p;

   283 

   284     (void)static_cast<bool>(p);

   285 }

   286 

   287 void tst_QScopedPointer::isNull()

   288 {

   289     /* Invoke on default constructed value. */

   290     {

   291         QScopedPointer<int> p;

   292         QVERIFY(p.isNull());

   293     }

   294 

   295     /* Invoke on a set value. */

   296     {

   297         QScopedPointer<int> p(new int(69));

   298         QVERIFY(!p.isNull());

   299     }

   300 }

   301 

   302 void tst_QScopedPointer::isNullSignature()

   303 {

   304     const QScopedPointer<int> p(new int(69));

   305 

   306     /* The signature should be const and return bool. */

   307     static_cast<bool>(p.isNull());

   308 }

   309 

   310 void tst_QScopedPointer::objectSize()

   311 {

   312     /* The size of QScopedPointer should be the same as one pointer. */

   313     QCOMPARE(sizeof(QScopedPointer<int>), sizeof(void *));

   314 }

   315 

   316 void tst_QScopedPointer::comparison()

   317 {

   318     int *a = new int(42);

   319     int *b = new int(43);

   320 

   321     QScopedPointer<int> pa(a);

   322     QScopedPointer<int> pa2(a);

   323     QScopedPointer<int> pb(b);

   324 

   325     // test equality on equal pointers

   326     QVERIFY(pa == pa2);

   327     QVERIFY(pa2 == pa);

   328 

   329     // test unequality on equal pointers

   330     QVERIFY(!(pa != pa2));

   331     QVERIFY(!(pa2 != pa));

   332 

   333     // test on unequal pointers

   334     QVERIFY(!(pa == pb));

   335     QVERIFY(!(pb == pa));

   336     QVERIFY(pb != pa);

   337     QVERIFY(pa != pb);

   338 

   339     pa2.take();

   340 }

   341 

   342 QTEST_MAIN(tst_QScopedPointer)

   343 #include "tst_qscopedpointer.moc"