public void DigitTerminalGetIntervalsShouldReturnSingleIntervalWithZeroToNineRange()
{
var digitTerminal = new DigitTerminal();
var intervals = digitTerminal.GetIntervals();
Assert.AreEqual(1, intervals.Count);
Assert.AreEqual('0', intervals[0].Min);
Assert.AreEqual('9', intervals[0].Max);
}
static SimpleExpressionGrammar()
{
var digit = new DigitTerminal();
ProductionExpression E = "E";
E.Rule =
E + "+" + E
| E + "*" + E
| digit;
_innerGrammar = new GrammarExpression(E, new[] { E }).ToGrammar();
}
private static ITerminal CreateTerminalForCharacter(char value, bool isEscaped, bool negate)
{
ITerminal terminal = null;
if (!isEscaped)
{
terminal = new CharacterTerminal(value);
}
else
{
switch (value)
{
case 's':
terminal = new WhitespaceTerminal();
break;
case 'd':
terminal = new DigitTerminal();
break;
case 'w':
terminal = new WordTerminal();
break;
case 'D':
terminal = new DigitTerminal();
negate = !negate;
break;
case 'S':
terminal = new WhitespaceTerminal();
negate = !negate;
break;
case 'W':
terminal = new WordTerminal();
negate = !negate;
break;
default:
terminal = new CharacterTerminal(value);
break;
}
}
if (negate)
{
terminal = new NegationTerminal(terminal);
}
return(terminal);
}
private static INfa Character(RegexCharacterClassCharacter character, bool negate)
{
var start = new NfaState();
var end = new NfaState();
ITerminal terminal = null;
if (!character.IsEscaped)
{
terminal = new CharacterTerminal(character.Value);
}
else
{
switch (character.Value)
{
case 's':
terminal = new WhitespaceTerminal();
break;
case 'd':
terminal = new DigitTerminal();
break;
case 'w':
terminal = new WordTerminal();
break;
case 'D':
terminal = new DigitTerminal();
negate = !negate;
break;
case 'S':
terminal = new WhitespaceTerminal();
negate = !negate;
break;
case 'W':
terminal = new WordTerminal();
negate = !negate;
break;
default:
terminal = new CharacterTerminal(character.Value);
break;
}
}
if (negate)
{
terminal = new NegationTerminal(terminal);
}
var transition = new TerminalNfaTransition(
terminal: terminal,
target: end);
start.AddTransistion(transition);
return(new Nfa(start, end));
}
public void DigitTerminalGivenNumberShouldMatch()
{
var digitTerminal = new DigitTerminal();
Assert.IsTrue(digitTerminal.IsMatch('0'));
}
public void DigitTerminalGivenLetterShouldFailMatch()
{
var digitTerminal = new DigitTerminal();
Assert.IsFalse(digitTerminal.IsMatch('a'));
}