1 files changed, 37 insertions, 0 deletions
diff --git a/tests/auto/qml/qqmlengine/tst_qqmlengine.cpp b/tests/auto/qml/qqmlengine/tst_qqmlengine.cpp
index b82a1f4174..bf68de0d2f 100644
--- a/tests/auto/qml/qqmlengine/tst_qqmlengine.cpp
+++ b/tests/auto/qml/qqmlengine/tst_qqmlengine.cpp
@@ -79,6 +79,7 @@ private slots:
     void lockedRootObject();
     void crossReferencingSingletonsDeletion();
     void bindingInstallUseAfterFree();
+    void attachedObjectOfUnregistered();
 
 public slots:
     QObject *createAQObjectForOwnershipTest ()
@@ -1708,6 +1709,42 @@ void tst_qqmlengine::bindingInstallUseAfterFree()
     QVERIFY(o);
 }
 
+class UnregisteredAttached : public QObject
+{
+    Q_OBJECT
+public:
+    UnregisteredAttached(QObject *parent = nullptr) : QObject(parent) {}
+};
+
+class Unregistered : public QObject
+{
+    Q_OBJECT
+    QML_ATTACHED(UnregisteredAttached)
+public:
+    static UnregisteredAttached *qmlAttachedProperties(QObject *obj)
+    {
+        return new UnregisteredAttached(obj);
+    }
+};
+
+void tst_qqmlengine::attachedObjectOfUnregistered()
+{
+    QObject o;
+
+    QObject *a = qmlAttachedPropertiesObject<Unregistered>(&o);
+    QVERIFY(a);
+    QVERIFY(qobject_cast<UnregisteredAttached *>(a));
+
+    QObject *b = qmlAttachedPropertiesObject<Unregistered>(&o);
+    QCOMPARE(a, b);
+
+    QObject o2;
+    QObject *c = qmlAttachedPropertiesObject<Unregistered>(&o2);
+    QVERIFY(c);
+    QVERIFY(qobject_cast<UnregisteredAttached *>(c));
+    QVERIFY(c != a);
+}
+
 QTEST_MAIN(tst_qqmlengine)
 
 #include "tst_qqmlengine.moc"