/// <summary>Test the hard coded rules.
/// One rule is testet with the load function.</summary>
/// <param name="code">String to parse.</param>
/// <param name="markup">Expected markup from rule output.</param>
/// <param name="rules">List of rules to test. The first rule is loaded.</param>
public static void ParserLoadRule(List <Rule> rules, string code, string markup)
{
var parser = new Parser();
var outElements = new List <TextElement>();
TextBuffer buffer = Util.NewBufferWs(code);
parser.Rules = rules.Select(r => r.CloneForParse(buffer) as Rule).ToList();
ParserBuilder.InitializeGrammar(parser, parser.Rules, buffer.Status);
ParserBuilder.ValidateGrammar(parser, buffer.Status);
string syntax = parser.GetGrammar();
Rule rule = parser.Rules[0];
Assert.AreEqual(true, rule.Load(outElements, 0), string.Format("rule '{0}': cant read", rule.Name));
string actual = outElements[0].ToMarkupProtected(string.Empty);
Assert.AreEqual(markup, actual, "Equation TestOption: document fail");
}