1 files changed, 89 insertions, 1 deletions

diff --git a/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp b/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
index b790cf80fd..6a92663bc4 100644
--- a/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
+++ b/tests/auto/corelib/tools/qvarlengtharray/tst_qvarlengtharray.cpp
@@ -1,5 +1,5 @@
 // Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
 #include <QtTest/QTest>
 #include <QVarLengthArray>
@@ -42,13 +42,31 @@ public:
     { return !operator==(lhs, rhs); }
 };
 
+class NonCopyable
+{
+    Q_DISABLE_COPY(NonCopyable)
+    int n;
+public:
+    NonCopyable() : n(0) {}
+    explicit NonCopyable(int n) : n(n) {}
+
+    friend bool operator==(const NonCopyable &lhs, const NonCopyable &rhs) noexcept
+    { return lhs.n == rhs.n; }
+    friend bool operator!=(const NonCopyable &lhs, const NonCopyable &rhs) noexcept
+    { return !operator==(lhs, rhs); }
+};
+
 class tst_QVarLengthArray : public QObject
 {
     Q_OBJECT
 private slots:
     void defaultConstructor_int() { defaultConstructor<int>(); }
     void defaultConstructor_QString() { defaultConstructor<QString>(); }
+    void sizeConstructor_int() { sizeConstructor<int>(); }
+    void sizeConstructor_QString() { sizeConstructor<QString>(); }
+    void sizeConstructor_NonCopyable() { sizeConstructor<NonCopyable>(); }
     void append();
+    void preallocatedSize();
 #if QT_DEPRECATED_SINCE(6, 3)
     void prepend();
 #endif
@@ -99,6 +117,8 @@ private slots:
 private:
     template <typename T>
     void defaultConstructor();
+    template <typename T>
+    void sizeConstructor();
     template <qsizetype N, typename T>
     void move(T t1, T t2);
     template <qsizetype N>
@@ -128,6 +148,31 @@ void tst_QVarLengthArray::defaultConstructor()
     }
 }
 
+template <typename T>
+void tst_QVarLengthArray::sizeConstructor()
+{
+    {
+        QVarLengthArray<T, 123> vla(0);
+        QCOMPARE(vla.size(), 0);
+        QVERIFY(vla.empty());
+        QVERIFY(vla.isEmpty());
+        QCOMPARE(vla.begin(), vla.end());
+        QCOMPARE(vla.capacity(), 123);
+    }
+    {
+        QVarLengthArray<T, 124> vla(124);
+        QCOMPARE(vla.size(), 124);
+        QVERIFY(!vla.empty());
+        QCOMPARE(vla.capacity(), 124);
+    }
+    {
+        QVarLengthArray<T, 124> vla(125);
+        QCOMPARE(vla.size(), 125);
+        QVERIFY(!vla.empty());
+        QCOMPARE_GE(vla.capacity(), 125);
+    }
+}
+
 void tst_QVarLengthArray::append()
 {
     QVarLengthArray<QString, 2> v;
@@ -150,6 +195,15 @@ void tst_QVarLengthArray::append()
     v2.append(5);
 }
 
+void tst_QVarLengthArray::preallocatedSize()
+{
+    // The default is 256:
+    static_assert(QVarLengthArray<int>::PreallocatedSize == 256);
+    // Otherwise, whatever was given as template argument:
+    static_assert(QVarLengthArray<int, 42>::PreallocatedSize == 42);
+    static_assert(QVarLengthArray<int, 1'000'000>::PreallocatedSize == 1'000'000);
+}
+
 #if QT_DEPRECATED_SINCE(6, 3)
 QT_WARNING_PUSH
 QT_WARNING_DISABLE_DEPRECATED
@@ -590,6 +644,12 @@ struct MyBase
     bool hasMoved() const { return !wasConstructedAt(this); }
 
 protected:
+    void swap(MyBase &other) {
+        using std::swap;
+        swap(data, other.data);
+        swap(isCopy, other.isCopy);
+    }
+
     MyBase(const MyBase *data, bool isCopy)
             : data(data), isCopy(isCopy) {}
 
@@ -664,6 +724,14 @@ struct MyMovable
         return *this;
     }
 
+    void swap(MyMovable &other) noexcept
+    {
+        MyBase::swap(other);
+        std::swap(i, other.i);
+    }
+
+    friend void swap(MyMovable &lhs, MyMovable &rhs) noexcept { lhs.swap(rhs); }
+
     bool operator==(const MyMovable &other) const
     {
         return i == other.i;
@@ -679,6 +747,15 @@ struct MyComplex
     {
         return i == other.i;
     }
+
+    void swap(MyComplex &other) noexcept
+    {
+        MyBase::swap(other);
+        std::swap(i, other.i);
+    }
+
+    friend void swap(MyComplex &lhs, MyComplex &rhs) noexcept { lhs.swap(rhs); }
+
     char i;
 };
 
@@ -1311,6 +1388,17 @@ void tst_QVarLengthArray::insertMove()
     QCOMPARE(MyBase::copyCount, 0);
 
     {
+        MyMovable m1, m2;
+        QCOMPARE(MyBase::liveCount, 2);
+        QCOMPARE(MyBase::copyCount, 0);
+        using std::swap;
+        swap(m1, m2);
+        QCOMPARE(MyBase::liveCount, 2);
+        QCOMPARE(MyBase::movedCount, 0);
+        QCOMPARE(MyBase::copyCount, 0);
+    }
+
+    {
         QVarLengthArray<MyMovable, 6> vec;
         MyMovable m1;
         MyMovable m2;