private void AssertEqual(DateTimeZone first, DateTimeZone second,
Instant start, Instant end, ZoneEqualityComparer.Options options)
{
var comparer = ZoneEqualityComparer.ForInterval(new Interval(start, end)).WithOptions(options);
Assert.IsTrue(comparer.Equals(first, second));
Assert.AreEqual(comparer.GetHashCode(first), comparer.GetHashCode(second));
}
private void AssertNotEqual(DateTimeZone first, DateTimeZone second,
Instant start, Instant end, ZoneEqualityComparer.Options options)
{
var comparer = ZoneEqualityComparer.ForInterval(new Interval(start, end)).WithOptions(options);
Assert.IsFalse(comparer.Equals(first, second));
// If this fails, the code *could* still be correct - but it's unlikely...
Assert.AreNotEqual(comparer.GetHashCode(first), comparer.GetHashCode(second));
}
/// <summary>
/// Returns the zone intervals within the given interval, potentially coalescing some of the
/// original intervals according to options.
/// </summary>
/// <remarks>
/// <para>
/// This is equivalent to <see cref="GetZoneIntervals(Interval)"/>, but may coalesce some intervals.
/// For example, if the <see cref="ZoneEqualityComparer.Options.OnlyMatchWallOffset"/> is specified,
/// and two consecutive zone intervals have the same offset but different names, a single zone interval
/// will be returned instead of two separate ones. When zone intervals are coalesced, all aspects of
/// the first zone interval are used except its end instant, which is taken from the second zone interval.
/// </para>
/// <para>
/// As the options are only used to determine which intervals to coalesce, the
/// <see cref="ZoneEqualityComparer.Options.MatchStartAndEndTransitions"/> option does not affect
/// the intervals returned.
/// </para>
/// </remarks>
/// <param name="interval">Interval to find zone intervals for. This is allowed to be unbounded (i.e.
/// infinite in both directions).</param>
/// <param name="options"></param>
/// <returns></returns>
public IEnumerable <ZoneInterval> GetZoneIntervals(Interval interval, ZoneEqualityComparer.Options options)
{
if ((options & ~ZoneEqualityComparer.Options.StrictestMatch) != 0)
{
throw new ArgumentOutOfRangeException(nameof(options),
$"The value {options} is not defined within ZoneEqualityComparer.Options");
}
var zoneIntervalEqualityComparer = new ZoneEqualityComparer.ZoneIntervalEqualityComparer(options, interval);
var originalIntervals = GetZoneIntervals(interval);
return(zoneIntervalEqualityComparer.CoalesceIntervals(originalIntervals));
}
