private void Reset()
{
_markupDescriptor = Mock.Of <IMarkupDescriptor>();
_collectionOwner = Mock.Of <IMarkupCollectionOwner>(c => c.Length == TextLength);
_collection = new MarkupCollection(_collectionOwner);
_allValidTextRanges = new Lazy <List <Range> >(() => GetAllTextRanges().ToList());
}
internal MarkupCollection(IMarkupCollectionOwner owner)
{
_owner = owner;
_subFragments = new LinkedList <MarkupNodeReference>();
}
