ild.');

    test(function() {
        const parent = node.cloneNode();
        const x = document.createElement('x');
        const child = document.createElement('test');
        parent.appendChild(child);
        parent.append(x, 'text');
        assert_equals(parent.childNodes[0], child);
        assert_equals(parent.childNodes[1], x);
        assert_equals(parent.childNodes[2].textContent, 'text');
    }, nodeName + '.append() with one element and text as argument, on a parent having a child.');
}

tes