import QtQuick 2.7 import Test 1.0 MyArrayBufferTestClass { property bool ok: false Component.onCompleted: { var buf = byteArrayMethod_CountUp(1, 3); var view = new DataView(buf); ok = buf instanceof ArrayBuffer && buf.byteLength == 3 && view.getUint8(0) == 1 && view.getUint8(1) == 2 && view.getUint8(2) == 3; } }