Implement QJsonDocument data stream operators

Task-number: QTBUG-48313
Change-Id: I25ebeed94c9340819e925a7740bbee21de73a0ca
Reviewed-by: Luca Beldi <v.ronin@yahoo.it>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/tests/auto/corelib/serialization/json/tst_qtjson.cpp b/tests/auto/corelib/serialization/json/tst_qtjson.cpp
index 4651258ef3..713c69149b 100644
--- a/tests/auto/corelib/serialization/json/tst_qtjson.cpp
+++ b/tests/auto/corelib/serialization/json/tst_qtjson.cpp
@@ -153,6 +153,10 @@ private Q_SLOTS:
     void implicitValueType();
     void implicitDocumentType();
 
+    void streamSerialization_data();
+    void streamSerialization();
+    void streamVariantSerialization();
+
 private:
     QString testDataDir;
 };
@@ -3011,5 +3015,42 @@ void tst_QtJson::implicitDocumentType()
     QCOMPARE(arrayDocument[-1].toInt(123), 123);
 }
 
+void tst_QtJson::streamSerialization_data()
+{
+    QTest::addColumn<QJsonDocument>("document");
+    QTest::newRow("empty") << QJsonDocument();
+    QTest::newRow("object") << QJsonDocument(QJsonObject{{"value", 42}});
+}
+
+void tst_QtJson::streamSerialization()
+{
+    // Check interface only, implementation is tested through to and from
+    // json functions.
+    QByteArray buffer;
+    QFETCH(QJsonDocument, document);
+    QJsonDocument output;
+    QDataStream save(&buffer, QIODevice::WriteOnly);
+    save << document;
+    QDataStream load(buffer);
+    load >> output;
+    QCOMPARE(output, document);
+}
+
+void tst_QtJson::streamVariantSerialization()
+{
+    // Check interface only, implementation is tested through to and from
+    // json functions.
+    QByteArray buffer;
+    QJsonDocument objectDoc(QJsonArray{665, 666, 667});
+    QVariant output;
+    QVariant variant(objectDoc);
+    QDataStream save(&buffer, QIODevice::WriteOnly);
+    save << variant;
+    QDataStream load(buffer);
+    load >> output;
+    QCOMPARE(output.userType(), QMetaType::QJsonDocument);
+    QCOMPARE(output.toJsonDocument(), objectDoc);
+}
+
 QTEST_MAIN(tst_QtJson)
 #include "tst_qtjson.moc"