Add unit tests to assure QtConcurrent works on move-only sequences

Unit tests are added to make sure QtConcurrent works on
move-only sequences.

Change-Id: I1d066f75ceab9cef98832e96c5827103cbfd72a8
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>

3 files changed, 291 insertions, 78 deletions

diff --git a/tests/auto/concurrent/qtconcurrentfilter/tst_qtconcurrentfilter.cpp b/tests/auto/concurrent/qtconcurrentfilter/tst_qtconcurrentfilter.cpp
index a2c5c20740..c7ab64c14c 100644
--- a/tests/auto/concurrent/qtconcurrentfilter/tst_qtconcurrentfilter.cpp
+++ b/tests/auto/concurrent/qtconcurrentfilter/tst_qtconcurrentfilter.cpp
@@ -222,12 +222,28 @@ void tst_QtConcurrentFilter::filtered()
     testFiltered(intList, intListEven, lambdaIsEven);
     CHECK_FAIL("lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::filtered(std::vector { 1, 2, 3, 4 }, keepEvenIntegers);
-    QCOMPARE(future.results(), QList<int>({ 2, 4 }));
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::filtered(std::vector { 1, 2, 3, 4 }, keepEvenIntegers);
+        QCOMPARE(future.results(), QList<int>({ 2, 4 }));
+
+        auto result = QtConcurrent::blockingFiltered(std::vector { 1, 2, 3, 4 }, keepEvenIntegers);
+        QCOMPARE(result, std::vector<int>({ 2, 4 }));
+    }
 
-    auto result = QtConcurrent::blockingFiltered(std::vector { 1, 2, 3, 4 }, keepEvenIntegers);
-    QCOMPARE(result, std::vector<int>({ 2, 4 }));
+#if 0
+    // does not work yet
+    {
+        // move only types sequences
+        auto future = QtConcurrent::filtered(
+                MoveOnlyVector({ 1, 2, 3, 4 }), keepEvenIntegers);
+        QCOMPARE(future.results(), QList<int>({ 2, 4 }));
+
+        auto result = QtConcurrent::blockingFiltered(
+                MoveOnlyVector({ 1, 2, 3, 4 }), keepEvenIntegers);
+        QCOMPARE(result, std::vector<int>({ 2, 4 }));
+    }
+#endif
 }
 
 template <typename SourceObject,
@@ -282,13 +298,30 @@ void tst_QtConcurrentFilter::filteredThreadPool()
     testFilteredThreadPool(&pool, intList, intListEven, lambdaIsOdd);
     CHECK_FAIL("lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::filtered(&pool, std::vector { 1, 2, 3, 4 }, keepEvenIntegers);
-    QCOMPARE(future.results(), QList<int>({ 2, 4 }));
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::filtered(&pool, std::vector { 1, 2, 3, 4 }, keepEvenIntegers);
+        QCOMPARE(future.results(), QList<int>({ 2, 4 }));
 
-    auto result =
-            QtConcurrent::blockingFiltered(&pool, std::vector { 1, 2, 3, 4 }, keepEvenIntegers);
-    QCOMPARE(result, std::vector<int>({ 2, 4 }));
+        auto result =
+                QtConcurrent::blockingFiltered(&pool, std::vector { 1, 2, 3, 4 }, keepEvenIntegers);
+        QCOMPARE(result, std::vector<int>({ 2, 4 }));
+    }
+
+#if 0
+    // does not work yet
+    {
+        // move-only sequences
+        auto future = QtConcurrent::filtered(
+                &pool, MoveOnlyVector({ 1, 2, 3, 4 }), keepEvenIntegers);
+        QCOMPARE(future.results(), QList<int>({ 2, 4 }));
+
+        auto result =
+                QtConcurrent::blockingFiltered(
+                        &pool, MoveOnlyVector({ 1, 2, 3, 4 }), keepEvenIntegers);
+        QCOMPARE(result, std::vector<int>({ 2, 4 }));
+    }
+#endif
 }
 
 template <typename SourceObject,
@@ -425,14 +458,27 @@ void tst_QtConcurrentFilter::filteredReduced()
     testFilteredReduced(intList, intSum, lambdaIsEven, lambdaIntSumReduce);
     CHECK_FAIL("lambda-lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::filteredReduced(std::vector { 1, 2, 3, 4 }, keepEvenIntegers,
-                                                intSumReduce);
-    QCOMPARE(future, intSum);
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::filteredReduced(std::vector { 1, 2, 3, 4 }, keepEvenIntegers,
+                                                    intSumReduce);
+        QCOMPARE(future, intSum);
+
+        auto result = QtConcurrent::blockingFilteredReduced(std::vector { 1, 2, 3, 4 },
+                                                            keepEvenIntegers, intSumReduce);
+        QCOMPARE(result, intSum);
+    }
 
-    auto result = QtConcurrent::blockingFilteredReduced(std::vector { 1, 2, 3, 4 },
-                                                        keepEvenIntegers, intSumReduce);
-    QCOMPARE(result, intSum);
+    {
+        // move only sequences
+        auto future = QtConcurrent::filteredReduced(MoveOnlyVector({ 1, 2, 3, 4 }),
+                                                    keepEvenIntegers, intSumReduce);
+        QCOMPARE(future, intSum);
+
+        auto result = QtConcurrent::blockingFilteredReduced(MoveOnlyVector({ 1, 2, 3, 4 }),
+                                                            keepEvenIntegers, intSumReduce);
+        QCOMPARE(result, intSum);
+    }
 }
 
 template <typename SourceObject,
@@ -510,14 +556,27 @@ void tst_QtConcurrentFilter::filteredReducedThreadPool()
     testFilteredReducedThreadPool(&pool, intList, intSum, lambdaIsOdd, lambdaSumReduce);
     CHECK_FAIL("lambda-lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::filteredReduced(&pool, std::vector { 1, 2, 3, 4 }, keepOddIntegers,
-                                                intSumReduce);
-    QCOMPARE(future, intSum);
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::filteredReduced(&pool, std::vector { 1, 2, 3, 4 },
+                                                    keepOddIntegers, intSumReduce);
+        QCOMPARE(future, intSum);
+
+        auto result = QtConcurrent::blockingFilteredReduced(&pool, std::vector { 1, 2, 3, 4 },
+                                                            keepOddIntegers, intSumReduce);
+        QCOMPARE(result, intSum);
+    }
 
-    auto result = QtConcurrent::blockingFilteredReduced(&pool, std::vector { 1, 2, 3, 4 },
-                                                        keepOddIntegers, intSumReduce);
-    QCOMPARE(result, intSum);
+    {
+        // move only sequences
+        auto future = QtConcurrent::filteredReduced(&pool, MoveOnlyVector({ 1, 2, 3, 4 }),
+                                                    keepOddIntegers, intSumReduce);
+        QCOMPARE(future, intSum);
+
+        auto result = QtConcurrent::blockingFilteredReduced(&pool, MoveOnlyVector({ 1, 2, 3, 4 }),
+                                                            keepOddIntegers, intSumReduce);
+        QCOMPARE(result, intSum);
+    }
 }
 
 void tst_QtConcurrentFilter::filteredReducedDifferentType()
@@ -714,14 +773,27 @@ void tst_QtConcurrentFilter::filteredReducedInitialValue()
                                     lambdaIntSumReduce, intInitial);
     CHECK_FAIL("lambda-lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::filteredReduced(std::vector { 1, 2, 3, 4 }, keepEvenIntegers,
-                                                intSumReduce, intInitial);
-    QCOMPARE(future, intSum);
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::filteredReduced(std::vector { 1, 2, 3, 4 }, keepEvenIntegers,
+                                                    intSumReduce, intInitial);
+        QCOMPARE(future, intSum);
+
+        auto result = QtConcurrent::blockingFilteredReduced(
+                std::vector { 1, 2, 3, 4 }, keepEvenIntegers, intSumReduce, intInitial);
+        QCOMPARE(result, intSum);
+    }
 
-    auto result = QtConcurrent::blockingFilteredReduced(std::vector { 1, 2, 3, 4 },
-                                                        keepEvenIntegers, intSumReduce, intInitial);
-    QCOMPARE(result, intSum);
+    {
+        // move only sequences
+        auto future = QtConcurrent::filteredReduced(MoveOnlyVector({ 1, 2, 3, 4 }),
+                                                    keepEvenIntegers, intSumReduce, intInitial);
+        QCOMPARE(future, intSum);
+
+        auto result = QtConcurrent::blockingFilteredReduced(
+                MoveOnlyVector({ 1, 2, 3, 4 }), keepEvenIntegers, intSumReduce, intInitial);
+        QCOMPARE(result, intSum);
+    }
 }
 
 template <typename SourceObject,
@@ -811,14 +883,27 @@ void tst_QtConcurrentFilter::filteredReducedInitialValueThreadPool()
                                               lambdaSumReduce, intInitial);
     CHECK_FAIL("lambda-lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::filteredReduced(&pool, std::vector { 1, 2, 3, 4 }, keepOddIntegers,
-                                                intSumReduce, intInitial);
-    QCOMPARE(future, intSum);
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::filteredReduced(&pool, std::vector { 1, 2, 3, 4 },
+                                                    keepOddIntegers, intSumReduce, intInitial);
+        QCOMPARE(future, intSum);
+
+        auto result = QtConcurrent::blockingFilteredReduced(
+                &pool, std::vector { 1, 2, 3, 4 }, keepOddIntegers, intSumReduce, intInitial);
+        QCOMPARE(result, intSum);
+    }
 
-    auto result = QtConcurrent::blockingFilteredReduced(&pool, std::vector { 1, 2, 3, 4 },
-                                                        keepOddIntegers, intSumReduce, intInitial);
-    QCOMPARE(result, intSum);
+    {
+        // move only sequences
+        auto future = QtConcurrent::filteredReduced(&pool, MoveOnlyVector({ 1, 2, 3, 4 }),
+                                                    keepOddIntegers, intSumReduce, intInitial);
+        QCOMPARE(future, intSum);
+
+        auto result = QtConcurrent::blockingFilteredReduced(
+                &pool, MoveOnlyVector({ 1, 2, 3, 4 }), keepOddIntegers, intSumReduce, intInitial);
+        QCOMPARE(result, intSum);
+    }
 }
 
 void tst_QtConcurrentFilter::filteredReducedDifferentTypeInitialValue()
diff --git a/tests/auto/concurrent/qtconcurrentmap/functions.h b/tests/auto/concurrent/qtconcurrentmap/functions.h
index b37ea08716..7c30c256cb 100644
--- a/tests/auto/concurrent/qtconcurrentmap/functions.h
+++ b/tests/auto/concurrent/qtconcurrentmap/functions.h
@@ -28,6 +28,8 @@
 #ifndef FUNCTIONS_H
 #define FUNCTIONS_H
 
+#include <vector>
+
 bool keepEvenIntegers(const int &x)
 {
     return (x & 1) == 0;
@@ -133,4 +135,34 @@ public:
     }
 };
 
+class MoveOnlyVector
+{
+public:
+    // rule of six
+    MoveOnlyVector() = default;
+    ~MoveOnlyVector() = default;
+    MoveOnlyVector(MoveOnlyVector &&other) = default;
+    MoveOnlyVector &operator=(MoveOnlyVector &&other) = default;
+
+    MoveOnlyVector(const MoveOnlyVector &) = delete;
+    MoveOnlyVector &operator=(const MoveOnlyVector &) = delete;
+
+    // convenience for creation
+    explicit MoveOnlyVector(const std::vector<int> &v) : data(v) { }
+
+    // minimal interface to be usable as a Sequence in QtConcurrent
+    typedef std::vector<int>::const_iterator const_iterator;
+    typedef std::vector<int>::iterator iterator;
+    const_iterator cbegin() const { return data.cbegin(); }
+    const_iterator cend() const { return data.cend(); }
+    iterator begin() { return data.begin(); }
+    iterator end() { return data.end(); }
+    const_iterator begin() const { return data.cbegin(); }
+    const_iterator end() const { return data.cend(); }
+    bool operator==(const MoveOnlyVector &other) const { return data == other.data; }
+
+private:
+    std::vector<int> data;
+};
+
 #endif
diff --git a/tests/auto/concurrent/qtconcurrentmap/tst_qtconcurrentmap.cpp b/tests/auto/concurrent/qtconcurrentmap/tst_qtconcurrentmap.cpp
index 6b844fa73d..021dac86f0 100644
--- a/tests/auto/concurrent/qtconcurrentmap/tst_qtconcurrentmap.cpp
+++ b/tests/auto/concurrent/qtconcurrentmap/tst_qtconcurrentmap.cpp
@@ -170,6 +170,15 @@ void tst_QtConcurrentMap::map()
         QCOMPARE(list, QList<int>() << 1 << 2 << 3);
     }
 
+    // functors take arguments by reference, modifying the move-only sequence in place
+    {
+        MoveOnlyVector moveOnlyVector({ 1, 2, 3 });
+
+        // functor
+        QtConcurrent::map(moveOnlyVector, MultiplyBy2InPlace()).waitForFinished();
+        QCOMPARE(moveOnlyVector, MoveOnlyVector({ 2, 4, 6 }));
+    }
+
 #if 0
     // not allowed: map() with immutable sequences makes no sense
     {
@@ -252,6 +261,18 @@ void tst_QtConcurrentMap::blockingMap()
         QCOMPARE(list, QList<int>() << 256 << 512 << 768);
     }
 
+    // functors take arguments by reference, modifying the move-only sequence in place
+    {
+        MoveOnlyVector moveOnlyVector({ 1, 2, 3 });
+
+        // functor
+        QtConcurrent::blockingMap(moveOnlyVector, MultiplyBy2InPlace());
+        QCOMPARE(moveOnlyVector, MoveOnlyVector({ 2, 4, 6 }));
+        QtConcurrent::blockingMap(moveOnlyVector.begin(), moveOnlyVector.end(),
+                                  MultiplyBy2InPlace());
+        QCOMPARE(moveOnlyVector, MoveOnlyVector({ 4, 8, 12 }));
+    }
+
     // functors don't take arguments by reference, making these no-ops
     {
         QList<int> list;
@@ -497,13 +518,25 @@ void tst_QtConcurrentMap::mapped()
     CHECK_FAIL("member");
 #endif
 
-    // rvalue sequences
-    auto future = QtConcurrent::mapped(std::vector { 1, 2, 3 }, multiplyBy2);
-    QCOMPARE(future.results(), QList<int>({ 2, 4, 6 }));
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::mapped(std::vector { 1, 2, 3 }, multiplyBy2);
+        QCOMPARE(future.results(), QList<int>({ 2, 4, 6 }));
 
-    auto result =
-            QtConcurrent::blockingMapped<std::vector<int>>(std::vector { 1, 2, 3 }, multiplyBy2);
-    QCOMPARE(result, std::vector<int>({ 2, 4, 6 }));
+        auto result = QtConcurrent::blockingMapped<std::vector<int>>(std::vector { 1, 2, 3 },
+                                                                     multiplyBy2);
+        QCOMPARE(result, std::vector<int>({ 2, 4, 6 }));
+    }
+
+    {
+        // move only sequences
+        auto future = QtConcurrent::mapped(MoveOnlyVector({ 1, 2, 3 }), multiplyBy2);
+        QCOMPARE(future.results(), QList<int>({ 2, 4, 6 }));
+
+        auto result = QtConcurrent::blockingMapped<std::vector<int>>(MoveOnlyVector({ 1, 2, 3 }),
+                                                                     multiplyBy2);
+        QCOMPARE(result, std::vector<int>({ 2, 4, 6 }));
+    }
 }
 
 static QSemaphore semaphore(1);
@@ -589,13 +622,24 @@ void tst_QtConcurrentMap::mappedThreadPool()
     testMappedThreadPool(&pool, intList, intListMultipiedBy3, lambdaMultiplyBy3);
     CHECK_FAIL("lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::mapped(&pool, std::vector { 1, 2, 3 }, multiplyBy2);
-    QCOMPARE(future.results(), QList<int>({ 2, 4, 6 }));
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::mapped(&pool, std::vector { 1, 2, 3 }, multiplyBy2);
+        QCOMPARE(future.results(), QList<int>({ 2, 4, 6 }));
 
-    auto result = QtConcurrent::blockingMapped<std::vector<int>>(&pool, std::vector { 1, 2, 3 },
-                                                                 multiplyBy2);
-    QCOMPARE(result, std::vector<int>({ 2, 4, 6 }));
+        auto result = QtConcurrent::blockingMapped<std::vector<int>>(&pool, std::vector { 1, 2, 3 },
+                                                                     multiplyBy2);
+        QCOMPARE(result, std::vector<int>({ 2, 4, 6 }));
+    }
+    {
+        // move only sequences
+        auto future = QtConcurrent::mapped(&pool, MoveOnlyVector({ 1, 2, 3 }), multiplyBy2);
+        QCOMPARE(future.results(), QList<int>({ 2, 4, 6 }));
+
+        auto result = QtConcurrent::blockingMapped<std::vector<int>>(
+                &pool, MoveOnlyVector({ 1, 2, 3 }), multiplyBy2);
+        QCOMPARE(result, std::vector<int>({ 2, 4, 6 }));
+    }
 }
 
 int intSquare(int x)
@@ -723,13 +767,26 @@ void tst_QtConcurrentMap::mappedReduced()
     testMappedReduced(intList, sumOfSquares, lambdaSquare, lambdaSumReduce);
     CHECK_FAIL("lambda-lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::mappedReduced(std::vector { 1, 2, 3 }, intSquare, intSumReduce);
-    QCOMPARE(future, sumOfSquares);
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::mappedReduced(std::vector { 1, 2, 3 }, intSquare, intSumReduce);
+        QCOMPARE(future, sumOfSquares);
+
+        auto result = QtConcurrent::blockingMappedReduced(std::vector { 1, 2, 3 }, intSquare,
+                                                          intSumReduce);
+        QCOMPARE(result, sumOfSquares);
+    }
+
+    {
+        // move only sequences
+        auto future =
+                QtConcurrent::mappedReduced(MoveOnlyVector({ 1, 2, 3 }), intSquare, intSumReduce);
+        QCOMPARE(future, sumOfSquares);
 
-    auto result =
-            QtConcurrent::blockingMappedReduced(std::vector { 1, 2, 3 }, intSquare, intSumReduce);
-    QCOMPARE(result, sumOfSquares);
+        auto result = QtConcurrent::blockingMappedReduced(MoveOnlyVector({ 1, 2, 3 }), intSquare,
+                                                          intSumReduce);
+        QCOMPARE(result, sumOfSquares);
+    }
 }
 
 template <typename SourceObject, typename ResultObject, typename MapObject, typename ReduceObject>
@@ -817,14 +874,27 @@ void tst_QtConcurrentMap::mappedReducedThreadPool()
     testMappedReducedThreadPool(&pool, intList, sumOfCubes, lambdaCube, lambdaSumReduce);
     CHECK_FAIL("lambda-lambda");
 
-    // rvalue sequences
-    auto future =
-            QtConcurrent::mappedReduced(&pool, std::vector { 1, 2, 3 }, intCube, intSumReduce);
-    QCOMPARE(future, sumOfCubes);
+    {
+        // rvalue sequences
+        auto future =
+                QtConcurrent::mappedReduced(&pool, std::vector { 1, 2, 3 }, intCube, intSumReduce);
+        QCOMPARE(future, sumOfCubes);
+
+        auto result = QtConcurrent::blockingMappedReduced(&pool, std::vector { 1, 2, 3 }, intCube,
+                                                          intSumReduce);
+        QCOMPARE(result, sumOfCubes);
+    }
 
-    auto result = QtConcurrent::blockingMappedReduced(&pool, std::vector { 1, 2, 3 }, intCube,
-                                                      intSumReduce);
-    QCOMPARE(result, sumOfCubes);
+    {
+        // move only sequences
+        auto future = QtConcurrent::mappedReduced(&pool, MoveOnlyVector({ 1, 2, 3 }), intCube,
+                                                  intSumReduce);
+        QCOMPARE(future, sumOfCubes);
+
+        auto result = QtConcurrent::blockingMappedReduced(&pool, MoveOnlyVector({ 1, 2, 3 }),
+                                                          intCube, intSumReduce);
+        QCOMPARE(result, sumOfCubes);
+    }
 }
 
 void tst_QtConcurrentMap::mappedReducedDifferentType()
@@ -988,14 +1058,27 @@ void tst_QtConcurrentMap::mappedReducedInitialValue()
     testMappedReducedInitialValue(intList, sumOfSquares, lambdaSquare, lambdaSumReduce, intInitial);
     CHECK_FAIL("lambda-lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::mappedReduced(std::vector { 1, 2, 3 }, intSquare, intSumReduce,
-                                              intInitial);
-    QCOMPARE(future, sumOfSquares);
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::mappedReduced(std::vector { 1, 2, 3 }, intSquare, intSumReduce,
+                                                  intInitial);
+        QCOMPARE(future, sumOfSquares);
+
+        auto result = QtConcurrent::blockingMappedReduced(std::vector { 1, 2, 3 }, intSquare,
+                                                          intSumReduce, intInitial);
+        QCOMPARE(result, sumOfSquares);
+    }
 
-    auto result = QtConcurrent::blockingMappedReduced(std::vector { 1, 2, 3 }, intSquare,
-                                                      intSumReduce, intInitial);
-    QCOMPARE(result, sumOfSquares);
+    {
+        // move only sequences
+        auto future = QtConcurrent::mappedReduced(MoveOnlyVector({ 1, 2, 3 }), intSquare,
+                                                  intSumReduce, intInitial);
+        QCOMPARE(future, sumOfSquares);
+
+        auto result = QtConcurrent::blockingMappedReduced(MoveOnlyVector({ 1, 2, 3 }), intSquare,
+                                                          intSumReduce, intInitial);
+        QCOMPARE(result, sumOfSquares);
+    }
 }
 
 template <typename SourceObject, typename ResultObject, typename InitialObject, typename MapObject, typename ReduceObject>
@@ -1082,14 +1165,27 @@ void tst_QtConcurrentMap::mappedReducedInitialValueThreadPool()
                                             lambdaSumReduce, intInitial);
     CHECK_FAIL("lambda-lambda");
 
-    // rvalue sequences
-    auto future = QtConcurrent::mappedReduced(&pool, std::vector { 1, 2, 3 }, intCube, intSumReduce,
-                                              intInitial);
-    QCOMPARE(future, sumOfCubes);
+    {
+        // rvalue sequences
+        auto future = QtConcurrent::mappedReduced(&pool, std::vector { 1, 2, 3 }, intCube,
+                                                  intSumReduce, intInitial);
+        QCOMPARE(future, sumOfCubes);
+
+        auto result = QtConcurrent::blockingMappedReduced(&pool, std::vector { 1, 2, 3 }, intCube,
+                                                          intSumReduce, intInitial);
+        QCOMPARE(result, sumOfCubes);
+    }
 
-    auto result = QtConcurrent::blockingMappedReduced(&pool, std::vector { 1, 2, 3 }, intCube,
-                                                      intSumReduce, intInitial);
-    QCOMPARE(result, sumOfCubes);
+    {
+        // move only sequences
+        auto future = QtConcurrent::mappedReduced(&pool, MoveOnlyVector({ 1, 2, 3 }), intCube,
+                                                  intSumReduce, intInitial);
+        QCOMPARE(future, sumOfCubes);
+
+        auto result = QtConcurrent::blockingMappedReduced(&pool, MoveOnlyVector({ 1, 2, 3 }),
+                                                          intCube, intSumReduce, intInitial);
+        QCOMPARE(result, sumOfCubes);
+    }
 }
 
 void tst_QtConcurrentMap::mappedReducedDifferentTypeInitialValue()