public void DirectoryScanned_Cancelled_RaisedWithDirectorySkipped()
{
cleaner.Cancel();
DirectorySkippedEventArgs args = null;
cleaner.DirectoryScanned += (s, e) => args = e as DirectorySkippedEventArgs;
cleaner.Clean(directory);
Assert.That(args, Is.Not.Null);
Assert.That(args.Directory, Is.EqualTo(directory));
Assert.That(args.Exception, Is.TypeOf <UserCancelledException>());
}