public void HtmlHasRightHeadElement()
{
var document = new HtmlDocument();
var root = new HtmlHtmlElement(document);
document.AppendChild(root);
var head = new HtmlHeadElement(document);
root.AppendChild(head);
Assert.AreEqual(head, document.Head);
}
/// <summary> Registers a <see cref="HtmlHeadElement"/>. </summary>
/// <remarks>
/// All calls to <see cref="RegisterHeadElement"/> must be completed before
/// <see cref="SetAppended"/> is called. (Typically during the <c>Render</c> phase.)
/// </remarks>
/// <param name="key">
/// The unique key identifying the header element in the collection. Must not be <see langword="null"/> or empty.
/// </param>
/// <param name="headElement">
/// The <see cref="HtmlHeadElement"/> representing the head element. Must not be <see langword="null"/>.
/// </param>
/// <param name="priority">
/// The priority level of the head element. Elements are rendered in the following order:
/// Library, UserControl, Page.
/// </param>
/// <exception cref="InvalidOperationException">
/// Thrown if method is called after <see cref="SetAppended"/> has executed.
/// </exception>
public void RegisterHeadElement(string key, HtmlHeadElement headElement, Priority priority)
{
ArgumentUtility.CheckNotNullOrEmpty("key", key);
ArgumentUtility.CheckNotNull("headElement", headElement);
EnsureStateIsClearedAfterServerTransfer();
if (_hasAppendExecuted)
{
throw new InvalidOperationException("RegisterHeadElement must not be called after SetAppended has been called.");
}
if (!IsRegistered(key))
{
_registeredKeys.Add(key, null);
_prioritizedHeadElements.Add(priority, headElement);
}
}
