public void ReturnNullMessage()
{
var lexer = new LexicalParser();
var sexer = new SyntaxParser(lexer);
var messages = sexer.Execute();
Assert.AreEqual(messages.First(), "Token is NULL");
}
static void Main(string[] args)
{
var lexicalAnalyzer = new LexicalParser();
var syntaxParser = new SyntaxParser(lexicalAnalyzer);
}