public void BetweenTest()
{
var lp = Chars.Char('(').Ignore();
var rp = Chars.Char(')').Ignore();
Combinator.Between(Chars.Any(), lp, rp)
.Run("(a)".AsStream())
.Case(
failure: (restStream, _) => Assert.Fail(),
success: (restStream, value) => Assert.AreEqual('a', value));
}
