public void CanGetCurrentPosition()
{
var empty = new TextTestFixture("");
empty.Advance(0).Position.ShouldBe(new Position(1, 1));
empty.Advance(1).Position.ShouldBe(new Position(1, 1));
var newLine = "\n";
var lines =
"Line 1" + newLine //Index 0-5, \n
+ "Line 2" + newLine //Index 7-12, \n
+ "Line 3" + newLine; //Index 14-19, \n
var list = new TextTestFixture(lines, newLine);
list.Advance(0).Position.ShouldBe(new Position(1, 1));
list.Advance(5).Position.ShouldBe(new Position(1, 6));
list.Advance(6).Position.ShouldBe(new Position(1, 7));
list.Advance(7).Position.ShouldBe(new Position(2, 1));
list.Advance(12).Position.ShouldBe(new Position(2, 6));
list.Advance(13).Position.ShouldBe(new Position(2, 7));
list.Advance(14).Position.ShouldBe(new Position(3, 1));
list.Advance(19).Position.ShouldBe(new Position(3, 6));
list.Advance(20).Position.ShouldBe(new Position(3, 7));
list.Advance(21).Position.ShouldBe(new Position(4, 1));
list.Advance(1000).Position.ShouldBe(new Position(4, 1));
}
public void CanAdvanceAheadNCharacters()
{
var empty = new TextTestFixture("");
empty.Advance(0).ToString().ShouldBe("");
empty.Advance(1).ToString().ShouldBe("");
var abc = new TextTestFixture("abc");
abc.Advance(0).ToString().ShouldBe("abc");
abc.Advance(1).ToString().ShouldBe("bc");
abc.Advance(2).ToString().ShouldBe("c");
abc.Advance(3).ToString().ShouldBe("");
abc.Advance(4).ToString().ShouldBe("");
abc.Advance(100).ToString().ShouldBe("");
}
public void ProducesTokenUponSuccessfulMatch()
{
lower.TryMatch((InputText)abcDEF, out Token token).ShouldBeTrue();
token.ShouldBe(lower, "abc", 1, 1);
upper.TryMatch(abcDEF.Advance(3), out token).ShouldBeTrue();
token.ShouldBe(upper, "DEF", 1, 4);
caseInsensitive.TryMatch((InputText)abcDEF, out token).ShouldBeTrue();
token.ShouldBe(caseInsensitive, "abcDEF", 1, 1);
}
public void CanMatchLeadingCharactersByPredicate()
{
Predicate <char> letters = char.IsLetter;
Predicate <char> digits = char.IsDigit;
Predicate <char> alphanumerics = char.IsLetterOrDigit;
var empty = new InputText("");
empty.Match(letters).ShouldFail();
var abc123 = new TextTestFixture("abc123");
abc123.Advance(0).Match(digits).ShouldFail();
abc123.Advance(0).Match(letters).ShouldSucceed("abc");
abc123.Advance(0).Match(alphanumerics).ShouldSucceed("abc123");
abc123.Advance(2).Match(digits).ShouldFail();
abc123.Advance(2).Match(letters).ShouldSucceed("c");
abc123.Advance(2).Match(alphanumerics).ShouldSucceed("c123");
abc123.Advance(3).Match(digits).ShouldSucceed("123");
abc123.Advance(3).Match(letters).ShouldFail();
abc123.Advance(3).Match(alphanumerics).ShouldSucceed("123");
abc123.Advance(6).Match(digits).ShouldFail();
abc123.Advance(6).Match(letters).ShouldFail();
abc123.Advance(6).Match(alphanumerics).ShouldFail();
}
public void CanMatchLeadingCharactersByTokenRegex()
{
var end = new TokenRegex(@"$");
var letters = new TokenRegex(@"[a-z]+");
var digits = new TokenRegex(@"[0-9]+");
var alphanumerics = new TokenRegex(@"[a-z0-9]+");
var empty = new InputText("");
empty.Match(letters).ShouldFail();
empty.Match(end).ShouldSucceed("");
var abc123 = new TextTestFixture("abc123");
abc123.Advance(0).Match(digits).ShouldFail();
abc123.Advance(0).Match(letters).ShouldSucceed("abc");
abc123.Advance(0).Match(alphanumerics).ShouldSucceed("abc123");
abc123.Advance(2).Match(digits).ShouldFail();
abc123.Advance(2).Match(letters).ShouldSucceed("c");
abc123.Advance(2).Match(alphanumerics).ShouldSucceed("c123");
abc123.Advance(3).Match(digits).ShouldSucceed("123");
abc123.Advance(3).Match(letters).ShouldFail();
abc123.Advance(3).Match(alphanumerics).ShouldSucceed("123");
abc123.Advance(6).Match(digits).ShouldFail();
abc123.Advance(6).Match(letters).ShouldFail();
abc123.Advance(6).Match(alphanumerics).ShouldFail();
}