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]+");
using (var empty = new LinedTextTestFixture(""))
{
empty.ReadLine().ShouldBeFalse();
empty.Match(letters).ShouldFail();
empty.Match(end).ShouldFail(); // the behavior is different with respect to Text
}
using (var abc123 = new LinedTextTestFixture("abc123"))
{
abc123.ReadLine().ShouldBeTrue();
abc123.Match(digits).ShouldFail();
abc123.Match(letters).ShouldSucceed("abc");
abc123.Match(alphanumerics).ShouldSucceed("abc123");
abc123.Advance(2);
abc123.Match(digits).ShouldFail();
abc123.Match(letters).ShouldSucceed("c");
abc123.Match(alphanumerics).ShouldSucceed("c123");
abc123.Advance(1);
abc123.Match(digits).ShouldSucceed("123");
abc123.Match(letters).ShouldFail();
abc123.Match(alphanumerics).ShouldSucceed("123");
abc123.Advance(3);
abc123.Match(digits).ShouldFail();
abc123.Match(letters).ShouldFail();
abc123.Match(alphanumerics).ShouldFail();
}
}
public void CanMatchLeadingCharactersByPredicate()
{
Predicate <char> letters = char.IsLetter;
Predicate <char> digits = char.IsDigit;
Predicate <char> alphanumerics = char.IsLetterOrDigit;
using (var empty = new LinedTextTestFixture(""))
{
empty.ReadLine().ShouldBeFalse();
empty.Match(letters).ShouldFail();
}
using (var abc123 = new LinedTextTestFixture("abc123"))
{
abc123.ReadLine().ShouldBeTrue();
abc123.Match(digits).ShouldFail();
abc123.Match(letters).ShouldSucceed("abc");
abc123.Match(alphanumerics).ShouldSucceed("abc123");
abc123.Advance(2);
abc123.Match(digits).ShouldFail();
abc123.Match(letters).ShouldSucceed("c");
abc123.Match(alphanumerics).ShouldSucceed("c123");
abc123.Advance(1);
abc123.Match(digits).ShouldSucceed("123");
abc123.Match(letters).ShouldFail();
abc123.Match(alphanumerics).ShouldSucceed("123");
abc123.Advance(3);
abc123.Match(digits).ShouldFail();
abc123.Match(letters).ShouldFail();
abc123.Match(alphanumerics).ShouldFail();
}
}