/// <summary>
/// Freezes the current thread until at least one element that matches the query appears in the document.
/// </summary>
/// <param name="doc"></param>
/// <param name="query"></param>
/// <param name="timeout"></param>
/// <returns>Matched elements.</returns>
public static IEnumerable <Element> WaitSelector(this HtmlDocument doc, string query, int timeout = 0)
{
if (timeout == 0)
{
timeout = DefaultTimeout;
}
var selector = new CssSelector(query);
var timespan = 100;
for (int i = 0; i < timeout / timespan; i++)
{
try
{
var elt = selector.Select(doc).ToListOrNull();
if (elt != null)
{
return(elt);
}
}
catch
{
}
Thread.Sleep(timespan);
}
return(selector.Select(doc));
}
public void Select(string html, string selector, string expectedIds)
{
var doc = new Document();
doc.Write(html);
var cssSelector = new CssSelector(selector);
var items = cssSelector.Select(doc.DocumentElement).Select(x => x.Id).ToArray();
CollectionAssert.AreEqual(string.IsNullOrEmpty(expectedIds) ? new string[0] : expectedIds.Split(','), items);
}