public void FirstPlusTest()
{
var innerComposite = new CompositeToken
{
Substring = "Inner"
};
var stringToken = new StringToken();
stringToken.Append('A');
innerComposite.Add(stringToken);
var composite = new CompositeToken
{
innerComposite,
new StringToken
{
Substring = "String"
}
};
var helper = new PrecedenceGrammarHelper(null);
var firstPlus = helper.FirstPlus(new List <GrammarReplaceRule>
{
new GrammarReplaceRule(PrecedenceParser.TokenEnum.Program, composite)
}, PrecedenceParser.TokenEnum.Program).ToList();
Assert.AreEqual(2, firstPlus.Count);
Assert.IsTrue(firstPlus.Any(x => x is StringToken && x.Substring == "A"));
Assert.IsTrue(firstPlus.Any(x => x is CompositeToken && x.Substring == "Inner"));
}
public void CompositeUndo(Action act)
{
redoItems.Clear();
var compositeItem = new CompositeToken();
undoItems.Push(compositeItem);
act();
if (!undoItems.Contains(compositeItem))
{
return;
}
var items = PopUntil(undoItems, compositeItem).ToList();
undoItems.Pop(); // take the compositeItem Placeholder of the stack
new CompositeUndoItem(items).PushOntoStack(undoItems);
}
