QJSManagedValue: Allow retrieving and instantiating JS metatypes

... a.k.a InternalClass. This is a faster way of creating multiple
similar objects, compared to a sequence of setProperty() calls.

Change-Id: Iecc8c581e50b9062895dae9500ffe2482d88028e
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

2 files changed, 38 insertions, 0 deletions

diff --git a/tests/auto/qml/qjsmanagedvalue/tst_qjsmanagedvalue.cpp b/tests/auto/qml/qjsmanagedvalue/tst_qjsmanagedvalue.cpp
index d245a034bb..75d3ccc12d 100644
--- a/tests/auto/qml/qjsmanagedvalue/tst_qjsmanagedvalue.cpp
+++ b/tests/auto/qml/qjsmanagedvalue/tst_qjsmanagedvalue.cpp
@@ -1785,4 +1785,41 @@ void tst_QJSManagedValue::stringByIndex()
     QVERIFY(str.property(506).isUndefined());
 }
 
+void tst_QJSManagedValue::jsMetaTypes()
+{
+    QJSEngine engine;
+    QJSManagedValue obj(engine.newObject(), &engine);
+
+    QJSManagedValue emptyMetaType = obj.jsMetaType();
+    QVERIFY(emptyMetaType.jsMetaMembers().isEmpty());
+
+    QJSManagedValue emptyObj = emptyMetaType.jsMetaInstantiate();
+    QVERIFY(emptyObj.isObject());
+
+    obj.setProperty("a", 1);
+    obj.setProperty("b", "foo");
+    obj.setProperty("llala", true);
+    obj.setProperty("ccc", QJSValue(std::move(emptyObj)));
+
+    const QStringList expectedMembers = { "a", "b", "llala", "ccc" };
+
+    QJSManagedValue populatedMetaType = obj.jsMetaType();
+    QCOMPARE(populatedMetaType.jsMetaMembers(), expectedMembers);
+
+    QJSManagedValue populatedObj = populatedMetaType.jsMetaInstantiate(
+                {"bar", 11, QJSValue(QJSValue::NullValue), 17, "ignored"});
+    QVERIFY(populatedObj.isObject());
+    QCOMPARE(populatedObj.property("a").toString(), QStringLiteral("bar"));
+    QCOMPARE(populatedObj.property("b").toInt(), 11);
+    QVERIFY(populatedObj.property("llala").isNull());
+    QCOMPARE(populatedObj.property("ccc").toInt(), 17);
+
+    QJSManagedValue halfPopulated = populatedMetaType.jsMetaInstantiate({"one", 111});
+    QVERIFY(halfPopulated.isObject());
+    QCOMPARE(halfPopulated.property("a").toString(), QStringLiteral("one"));
+    QCOMPARE(halfPopulated.property("b").toInt(), 111);
+    QVERIFY(halfPopulated.property("llala").isUndefined());
+    QVERIFY(halfPopulated.property("ccc").isUndefined());
+}
+
 QTEST_MAIN(tst_QJSManagedValue)
diff --git a/tests/auto/qml/qjsmanagedvalue/tst_qjsmanagedvalue.h b/tests/auto/qml/qjsmanagedvalue/tst_qjsmanagedvalue.h
index 041aae56aa..ea0d49589d 100644
--- a/tests/auto/qml/qjsmanagedvalue/tst_qjsmanagedvalue.h
+++ b/tests/auto/qml/qjsmanagedvalue/tst_qjsmanagedvalue.h
@@ -108,6 +108,7 @@ private Q_SLOTS:
     void stringAndUrl();
     void jsFunctionInVariant();
     void stringByIndex();
+    void jsMetaTypes();
 
 private:
     void newEngine() { engine.reset(new QJSEngine()); }