public void TryParseCharacterRange_ReturnsFailureResult_WhenInputStreamIsTooShortForCharacterRange(string input)
{
var stream = GetStringStreamFor(input);
var parser = new PrimitiveParser(_alphabet);
var result = parser.TryParseCharacterRange(stream);
Assert.IsFalse(result.IsSuccess);
Assert.AreEqual(RegSeedErrorType.None, result.ErrorType);
stream.Received(0).Pop();
}
public void TryParseCharacterRange_ReturnsFailureResult_WhenFirstStreamCharacterIsNotValidCharacter()
{
_alphabet.IsValid(Arg.Any <string>()).Returns(false);
var stream = GetStringStreamFor("n-2");
var parser = new PrimitiveParser(_alphabet);
var result = parser.TryParseCharacterRange(stream);
Assert.IsFalse(result.IsSuccess);
Assert.AreEqual(RegSeedErrorType.None, result.ErrorType);
_alphabet.Received(1).IsValid(Arg.Any <string>());
stream.Received(0).Pop();
}
public void TryParseCharacterRange_ReturnsFailureResult_WhenThirdCharacterIsInvalidCharacter(string inputStream)
{
_alphabet.IsValid(Arg.Any <string>()).Returns(x => !x[0].Equals("s"));
var stream = GetStringStreamFor(inputStream);
var parser = new PrimitiveParser(_alphabet);
var result = parser.TryParseCharacterRange(stream);
Assert.IsFalse(result.IsSuccess);
Assert.AreEqual(RegSeedErrorType.CharacterRangeExpected, result.ErrorType);
_alphabet.Received(2).IsValid(Arg.Any <string>());
stream.Received(0).Pop();
}
public void TryParseCharacterRange_ReturnsSuccessResult_WhenStreamIsCorrectCharacterRange(string inputStream,
string expectedStart, string expectedEnd, int expectedPops)
{
_alphabet.IsValid(Arg.Any <string>()).Returns(true);
_alphabet.TryGetRange(Arg.Any <string>(), Arg.Any <string>(), out _).Returns(new SuccessResult());
var stream = GetStringStreamFor(inputStream);
var parser = new PrimitiveParser(_alphabet);
var result = parser.TryParseCharacterRange(stream);
Assert.IsTrue(result.IsSuccess);
_alphabet.Received(2).IsValid(Arg.Any <string>());
_alphabet.Received(1).TryGetRange(expectedStart, expectedEnd, out _);
stream.Received(expectedPops).Pop();
}
public void TryParseCharacterRange_ThrowsArgumentNullException_WhenInputStreamIsNull()
{
var parser = new PrimitiveParser(_alphabet);
Assert.Throws <ArgumentNullException>(() => parser.TryParseCharacterRange(null));
}