static SimpleExpressionGrammar()
{
var digit = new DigitTerminal();
ProductionExpression E = "E";
E.Rule =
E + "+" + E
| E + "*" + E
| digit;
_innerGrammar = new GrammarExpression(E, new[] { E }).ToGrammar();
}
public void Test_DigitTerminal_That_IsMatch_Returns_True_When_Number()
{
var digitTerminal = new DigitTerminal();
Assert.IsTrue (digitTerminal.IsMatch('0'));
}
public void Test_DigitTerminal_That_IsMatch_Returns_False_When_Letter()
{
var digitTerminal = new DigitTerminal();
Assert.IsFalse(digitTerminal.IsMatch('a'));
}
public void DigitTerminalGivenNumberShouldMatch()
{
var digitTerminal = new DigitTerminal();
Assert.IsTrue(digitTerminal.IsMatch('0'));
}
public void DigitTerminalGivenLetterShouldFailMatch()
{
var digitTerminal = new DigitTerminal();
Assert.IsFalse(digitTerminal.IsMatch('a'));
}
public ITerminalBuilder Digit()
{
var digitTerminal = new DigitTerminal();
_terminals.Add(digitTerminal);
return this;
}