/// <summary>
/// Parse a year match expression.
/// <example>
/// Valid expression are:
/// * => Every year
/// 2020 => Exactly that year
/// ..2030 => Every year until 2030 comprised
/// 2020.. => Every year starting from 2020
/// 2020..2030 => Every year between 2020 and 2030
/// */Leap => Every leap year
/// 2020..2030/Leap => Every leap year between 2020 and 2030
/// */NotLeap => Every non leap year
/// 2020..2030/2 => Starting from 2020 every 2 years until 2030
/// 2020../2 => Starting from 2020 every 2 years
/// 2020../NotLeap => Starting from 2020 every NonLeap year
/// 2020..2030%2 => Every year which reminder modulo 2 is zero between 2020 and 2030
/// 2020..%3 => Starting from 2020 every year which reminder modulo 3 is zero
/// </example>
/// </summary>
public override bool TryParse(string value, out IYearMatcher yearMatcher)
{
if (RangeYearMatcher.TryParse(value, out var rangeYearMatcher))
{
yearMatcher = rangeYearMatcher;
return(true);
}
if (PeriodicYearMatcher.TryParse(value, out var periodYearMatcher))
{
yearMatcher = periodYearMatcher;
return(true);
}
if (ModuloYearMatcher.TryParse(value, out var moduloYearMatcher))
{
yearMatcher = moduloYearMatcher;
return(true);
}
if (LeapYearMatcher.TryParse(value, out var leapYearMatcher))
{
yearMatcher = leapYearMatcher;
return(true);
}
if (NotLeapYearMatcher.TryParse(value, out var notLeapYearMatcher))
{
yearMatcher = notLeapYearMatcher;
return(true);
}
yearMatcher = default;
return(false);
}
public void CtorTests()
{
_ = new LeapYearMatcher(null, null);
_ = new LeapYearMatcher(2000, null);
_ = new LeapYearMatcher(null, 2000);
_ = new LeapYearMatcher(2000, 3000);
Assert.ThrowsException <ArgumentException>(() => new LeapYearMatcher(2000, 2000));
}
public void MatchTests()
{
var lym = new LeapYearMatcher(null, null);
var dt2000 = new DateTime(2000, 1, 1);
var dt2001 = new DateTime(2001, 1, 1);
var dt2020 = new DateTime(2020, 1, 1);
var dt2100 = new DateTime(2100, 1, 1);
Assert.IsTrue(lym.Match(dt2000));
Assert.IsFalse(lym.Match(dt2001));
Assert.IsTrue(lym.Match(dt2020));
Assert.IsFalse(lym.Match(dt2100));
}
public void TryParseTests()
{
// Testing object factory (valid)
Assert.IsTrue(LeapYearMatcher.TryParse("*/Leap", out var lym));
Assert.IsNotNull(lym);
Assert.IsNull(lym.Left);
Assert.IsNull(lym.Right);
Assert.IsTrue(LeapYearMatcher.TryParse("1..100/Leap", out lym));
Assert.IsNotNull(lym);
Assert.AreEqual(1, lym.Left);
Assert.AreEqual(100, lym.Right);
// Testing object factory (invalid)
Assert.IsFalse(LeapYearMatcher.TryParse("/Leap", out lym));
Assert.IsNull(lym);
Assert.IsFalse(LeapYearMatcher.TryParse("12/Leap", out lym));
Assert.IsNull(lym);
Assert.IsFalse(LeapYearMatcher.TryParse("12..12/Leap", out lym));
Assert.IsNull(lym);
}