public void TryGetTokenParser_ReturnsFalse_WhenCharacterIsInvalid()
{
_alphabet.IsValid(Arg.Any <string>()).Returns(false);
var factory = new StatefulParserFactory(_alphabet);
var result = factory.TryGetTokenParser("s", out _);
Assert.IsFalse(result);
}
public void TryGetTokenParser_ReturnsParserFromAlphabet_WhenCharacterClassStateIsNotActivated()
{
var parser = Substitute.For <ITokenParser>();
_alphabet.TryGetTokenParser(Arg.Any <string>(), out _).Returns(x =>
{
x[1] = parser;
return(true);
});
var factory = new StatefulParserFactory(_alphabet);
var result = factory.TryGetTokenParser("s", out var resultParser);
Assert.IsTrue(result);
Assert.AreEqual(parser, resultParser);
}
public void TryGetTokenParser_CharacterClassStateIsActivated_WhenOpenCharacterClassIsParsed()
{
var parser = Substitute.For <ITokenParser>();
_alphabet.TryGetTokenParser(Arg.Any <string>(), out _).Returns(x =>
{
x[1] = parser;
return(true);
});
var factory = new StatefulParserFactory(_alphabet);
factory.TryGetTokenParser("s", out var resultParser);
Assert.AreEqual(parser, resultParser);
factory.TryGetTokenParser(SpecialCharacters.OpenCharacterClass, out resultParser);
Assert.AreEqual(parser, resultParser);
factory.TryGetTokenParser("s", out resultParser);
Assert.IsInstanceOf <CharacterClassCharacterParser>(resultParser);
}
