public void TestAddAttributesAndValuesToTree()
{
string expectedResult = "<orders><order><item quantity='1' number='1234'>" +
"DogHouse</item></order></orders>";
TagNode orders = new TagNode("orders");
TagNode order = new TagNode("order");
TagNode item = new TagNode("item");
item.AddAttributes("quantity", "1");
item.AddAttributes("number", "1234");
item.SetValue("DogHouse");
order.Add(item);
orders.Add(order);
Assert.Equal(orders.ToString(), expectedResult);
}