Enable conversion from QJSValues containing arrays to container types

We started to convert containers to QJSValues, so that we could use them
as JavaScript arrays. Unfortunately, this would then lead to a type missmatch
when those same values where to be stored in a property of the container
type. This commit fixes this by converting them back to the original
type.

Fixes: QTBUG-80916
Change-Id: I30a3b03e17c34b171d4a6881dfd7801c13e94d80
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/auto/qml/qqmllanguage/tst_qqmllanguage.cpp b/tests/auto/qml/qqmllanguage/tst_qqmllanguage.cpp
index fae74f1f25..4a8ce77f92 100644
--- a/tests/auto/qml/qqmllanguage/tst_qqmllanguage.cpp
+++ b/tests/auto/qml/qqmllanguage/tst_qqmllanguage.cpp
@@ -303,6 +303,8 @@ private slots:
 
     void typeWrapperToVariant();
 
+    void arrayToContainer();
+
 private:
     QQmlEngine engine;
     QStringList defaultImportPathList;
@@ -5238,6 +5240,31 @@ void tst_qqmllanguage::typeWrapperToVariant()
     QVERIFY(target);
 }
 
+class TestItem : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY( QVector<QPointF> positions MEMBER m_points  )
+
+public:
+    TestItem() = default;
+    QVector< QPointF > m_points;
+};
+
+
+Q_DECLARE_METATYPE(QVector<QPointF>);
+void tst_qqmllanguage::arrayToContainer()
+{
+    QQmlEngine engine;
+    qmlRegisterType<TestItem>("qt.test", 1, 0, "TestItem");
+    QVector<QPointF> points { QPointF (2.0, 3.0) };
+    engine.rootContext()->setContextProperty("test", QVariant::fromValue(points));
+    QQmlComponent component(&engine, testFileUrl("arrayToContainer.qml"));
+    VERIFY_ERRORS(0);
+    QScopedPointer<TestItem> root(qobject_cast<TestItem *>(component.createWithInitialProperties( {{"vector", QVariant::fromValue(points)}} )));
+    QVERIFY(root);
+    QCOMPARE(root->m_points.at(0), QPointF (2.0, 3.0) );
+}
+
 QTEST_MAIN(tst_qqmllanguage)
 
 #include "tst_qqmllanguage.moc"