qt6-bb10/qtdeclarative/tests/auto/qml/qqmlxmlhttprequest/data/setRequestHeader_unsent.qml

import QtQuick 2.0

QtObject {
    property bool test: false

    Component.onCompleted: {
        var x = new XMLHttpRequest;

        try {
            x.setRequestHeader("Test-header", "value");
        } catch (e) {
            if (e.code == DOMException.INVALID_STATE_ERR)
                test = true;
        }
    }
}