public void TestWrapAll()
{
var n1 = new HElement("span", "Content 1");
var n2 = new HElement("span", "Content 2");
var n3 = new HElement("span", "Content 3");
var n4 = new HElement("span", "Content 4");
var root = new HElement("div", n1, n2, n3, n4);
var elements = new HElement[] { n1, n3, n4 };
Assert.Same(elements, elements.WrapAll(new HElement("p", new HElement("a"))));
Assert.Equal("<div><p><a><span>Content 1</span><span>Content 3</span><span>Content 4</span></a></p><span>Content 2</span></div>", root.ToString());
}