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