Fix warnings about unused variables and functions in tests

Change-Id: Ia758a91384083c13fb4d743f500fef7a6629dfd5
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

tests/auto/corelib/thread/qmutex/tst_qmutex.cpp

@@ -715,7 +715,6 @@ void tst_QMutex::try_lock_for_recursive()
     public:
         void run()
         {
-            const std::chrono::milliseconds systemTimersResolutionAsDuration(systemTimersResolution);
             testsTurn.release();
 
             threadsTurn.acquire();

tests/auto/corelib/tools/collections/tst_collections.cpp

@@ -2737,14 +2737,12 @@ void instantiatePairAssociative()
 {
     instantiateMutableIterationContainer<ContainerType, KeyType>();
 
-    typename ContainerType::iterator it;
-    typename ContainerType::const_iterator constIt;
     const KeyType key = KeyType();
     const ValueType value = ValueType();
     ContainerType container;
     const ContainerType constContainer(container);
 
-    it = container.insert(key, value);
+    auto it = container.insert(key, value);
     container.erase(it);
     container.find(key);
     container.constFind(key);

tests/auto/corelib/tools/qarraydata/tst_qarraydata.cpp

@@ -1041,22 +1041,6 @@ void tst_QArrayData::arrayOps2()
 
 Q_DECLARE_METATYPE(QArrayDataPointer<int>)
 
-static inline bool arrayIsFilledWith(const QArrayDataPointer<int> &array,
-        int fillValue, size_t size)
-{
-    const int *iter = array->begin();
-    const int *const end = array->end();
-
-    for (size_t i = 0; i < size; ++i, ++iter)
-        if (*iter != fillValue)
-            return false;
-
-    if (iter != end)
-        return false;
-
-    return true;
-}
-
 struct ResetOnDtor
 {
     ResetOnDtor()

tests/auto/gui/kernel/qkeysequence/tst_qkeysequence.cpp

@@ -77,11 +77,6 @@ static bool operator<(const MacSpecialKey &entry, int key)
     return entry.key < key;
 }
 
-static bool operator<(int key, const MacSpecialKey &entry)
-{
-    return key < entry.key;
-}
-
 static const MacSpecialKey * const MacSpecialKeyEntriesEnd = entries + NumEntries;
 
 static QChar macSymbolForQtKey(int key)

tests/auto/gui/painting/qpainterpath/tst_qpainterpath.cpp

@@ -955,18 +955,12 @@ void tst_QPainterPath::operators()
     QCOMPARE(test, expected);
 }
 
-static inline bool pathFuzzyCompare(double p1, double p2)
+template <typename T>
+static inline bool pathFuzzyCompare(T p1, T p2)
 {
     return qAbs(p1 - p2) < 0.001;
 }
 
-
-static inline bool pathFuzzyCompare(float p1, float p2)
-{
-    return qAbs(p1 - p2) < 0.001;
-}
-
-
 void tst_QPainterPath::testArcMoveTo()
 {
     QFETCH(QRectF, rect);

tests/auto/gui/rhi/qrhi/tst_qrhi.cpp

@@ -475,13 +475,13 @@ void tst_QRhi::nativeHandles()
         rt->setRenderPassDescriptor(rpDesc.data());
         QVERIFY(rt->create());
 
-        const QRhiNativeHandles *rpHandles = rpDesc->nativeHandles();
         switch (impl) {
         case QRhi::Null:
             break;
 #ifdef TST_VK
         case QRhi::Vulkan:
         {
+            const QRhiNativeHandles *rpHandles = rpDesc->nativeHandles();
             const QRhiVulkanRenderPassNativeHandles *vkHandles = static_cast<const QRhiVulkanRenderPassNativeHandles *>(rpHandles);
             QVERIFY(vkHandles);
             QVERIFY(vkHandles->renderPass);

tests/auto/sql/models/qsqltablemodel/tst_qsqltablemodel.cpp

@@ -859,7 +859,6 @@ void tst_QSqlTableModel::insertRowFailure()
     values.setGenerated(1, true);
 
     // populate 1 row
-    const QSqlDriver::DbmsType dbType = tst_Databases::getDatabaseType(db);
     QVERIFY_SQL(model, insertRecord(0, values));
     QVERIFY_SQL(model, submitAll());
     QVERIFY_SQL(model, select());

tests/auto/widgets/dialogs/qdialog/tst_qdialog.cpp

@@ -359,7 +359,7 @@ void tst_QDialog::showSizeGrip()
 {
     QDialog dialog(nullptr);
     dialog.show();
-    QWidget *ext = new QWidget(&dialog);
+    new QWidget(&dialog);
     QVERIFY(!dialog.isSizeGripEnabled());
 
     dialog.setSizeGripEnabled(true);

tests/auto/widgets/styles/qmacstyle/tst_qmacstyle.cpp

@@ -31,8 +31,6 @@
 #include <QtWidgets>
 #include <private/qstylehelper_p.h>
 
-const int N = 1;
-
 Q_DECLARE_METATYPE(QStyleHelper::WidgetSizePolicy);
 
 #define CT(E) \
@@ -40,22 +38,13 @@ Q_DECLARE_METATYPE(QStyleHelper::WidgetSizePolicy);
 
 typedef QSizePolicy::ControlType ControlType;
 
-CT(DefaultType)
 CT(ButtonBox)
 CT(CheckBox)
 CT(ComboBox)
-CT(Frame)
-CT(GroupBox)
 CT(Label)
-CT(Line)
 CT(LineEdit)
 CT(PushButton)
 CT(RadioButton)
-CT(Slider)
-CT(SpinBox)
-CT(TabWidget)
-CT(ToolButton)
-
 
 class tst_QMacStyle : public QObject
 {

tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp

@@ -608,10 +608,12 @@ void tst_QMdiArea::showWindows()
 
 //#define USE_SHOW
 
+#if !defined(Q_OS_DARWIN)
 static inline QString windowTitle(const QString &t, const QString &f)
 {
     return t + QLatin1String(" - [") + f + QLatin1Char(']');
 }
+#endif
 
 void tst_QMdiArea::changeWindowTitle()
 {