1 files changed, 44 insertions, 0 deletions
diff --git a/tests/auto/corelib/tools/qbitarray/tst_qbitarray.cpp b/tests/auto/corelib/tools/qbitarray/tst_qbitarray.cpp
index 8fd209c7e2..7f33c6060b 100644
--- a/tests/auto/corelib/tools/qbitarray/tst_qbitarray.cpp
+++ b/tests/auto/corelib/tools/qbitarray/tst_qbitarray.cpp
@@ -7,6 +7,9 @@
 
 #include "qbitarray.h"
 
+#include <QtCore/qelapsedtimer.h>
+#include <QtCore/qscopeguard.h>
+
 /**
  * Helper function to initialize a bitarray from a string
  */
@@ -36,6 +39,7 @@ class tst_QBitArray : public QObject
 {
     Q_OBJECT
 private slots:
+    void canHandleIntMaxBits();
     void size_data();
     void size();
     void countBits_data();
@@ -81,6 +85,46 @@ private slots:
     void toUInt32();
 };
 
+void tst_QBitArray::canHandleIntMaxBits()
+{
+    QElapsedTimer timer;
+    timer.start();
+    const auto print = qScopeGuard([&] {
+        qDebug("Function took %lldms", qlonglong(timer.elapsed()));
+    });
+
+    try {
+        constexpr int Size1 = INT_MAX - 2;
+        constexpr int Size2 = Size1 + 2;
+
+        QBitArray ba(Size1, true);
+        QCOMPARE(ba.size(), Size1);
+        QCOMPARE(ba.at(Size1 - 1), true);
+
+        ba.resize(Size2);
+        QCOMPARE(ba.size(), Size2);
+        QCOMPARE(ba.at(Size1 - 1), true);
+        QCOMPARE(ba.at(Size1),     false);
+        QCOMPARE(ba.at(Size2 - 1), false);
+
+        QByteArray serialized;
+        {
+            QDataStream ds(&serialized, QIODevice::WriteOnly);
+            ds << ba;
+            QCOMPARE(ds.status(), QDataStream::Status::Ok);
+        }
+        {
+            QDataStream ds(serialized);
+            QBitArray ba2;
+            ds >> ba2;
+            QCOMPARE(ds.status(), QDataStream::Status::Ok);
+            QCOMPARE(ba, ba2);
+        }
+    } catch (const std::bad_alloc &) {
+        QSKIP("Failed to allocate sufficient memory");
+    }
+}
+
 void tst_QBitArray::size_data()
 {
     //create the testtable instance and define the elements