public void InputMatchesFirstParserAndSecondParser_SecondParserShorter_Success()
{
IScanner letter = new StringScanner("abc");
DifferenceParser parser = new DifferenceParser(Ops.Sequence(this._letterOrDigit, this._letterOrDigit),
this._letterOrDigit);
Assert.IsTrue(parser.Parse(letter).Success);
}
public void InputMatchesFirstParserAndSecondParser_SecondParserLonger_Fail()
{
IScanner letter = new StringScanner("abc");
DifferenceParser parser = new DifferenceParser(this._letterOrDigit,
Ops.Sequence(this._letterOrDigit, this._letterOrDigit));
Assert.IsFalse(parser.Parse(letter).Success);
}
public void InputDoesNotMatchFirstParserButMatchesSecondParser_Actions_None()
{
IScanner symbol = new StringScanner("+");
DifferenceParser parser = new DifferenceParser(this._letterOrDigit, this._symbol);
parser.Act += OnDifferenceParserSuccess;
parser.Parse(symbol);
Assert.IsFalse(_differenceParserSuccess);
Assert.IsFalse(_letterOrDigitParserSuccess);
Assert.IsFalse(_symbolParserSuccess); // should never call since first parser doesn't match
}
public void InputDoesNotMatchFirstParserButMatchesSecondParser_ScanPosition_NoChange()
{
IScanner symbol = new StringScanner("+hello");
DifferenceParser parser = new DifferenceParser(this._letterOrDigit, this._symbol);
parser.Parse(symbol);
Assert.AreEqual(0, symbol.Offset);
}
public void InputDoesNotMatchFirstParserButMatchesSecondParser_Fail()
{
IScanner symbol = new StringScanner("+");
DifferenceParser parser = new DifferenceParser(this._letterOrDigit, this._symbol);
parser.Act += OnDifferenceParserSuccess;
Assert.IsFalse(parser.Parse(symbol).Success);
}
