1 files changed, 29 insertions, 0 deletions
diff --git a/tests/auto/corelib/text/qstring/tst_qstring_wasm.cpp b/tests/auto/corelib/text/qstring/tst_qstring_wasm.cpp
new file mode 100644
index 0000000000..64865211dc
--- /dev/null
+++ b/tests/auto/corelib/text/qstring/tst_qstring_wasm.cpp
@@ -0,0 +1,29 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <QtCore/QString>
+#include <QTest>
+
+#include <emscripten/val.h>
+
+void tst_QString_wasmTypes()
+{
+    const QLatin1StringView testString("test string");
+    // QString <-> emscripten::val
+    {
+        QString qtString = testString;
+        const emscripten::val jsString = qtString.toEcmaString();
+        QString qtStringCopy(qtString);
+        qtString = qtString.toUpper(); // modify
+        QCOMPARE(QString::fromEcmaString(jsString), qtStringCopy);
+    }
+    {
+        QString longString;
+        for (uint64_t i = 0; i < 1000; ++i)
+            longString += testString;
+        const emscripten::val jsString = longString.toEcmaString();
+        QString qtStringCopy(longString);
+        longString = longString.toUpper(); // modify
+        QCOMPARE(QString::fromEcmaString(jsString), qtStringCopy);
+    }
+}