public void GetZoneIntervals_GapAroundAndInTailZoneTransition()
{
// Tail zone is -10 / +5, with the transition occurring just after
// the transition *to* the tail zone from the precalculated zone.
// A local instant of one hour after the transition from the precalculated zone (which is -5)
// will therefore be in the gap. No zone interval matches, so the result is
// an empty pair.
var tailZone = new SingleTransitionZone(ThirdInterval.End + Duration.FromHours(1), -10, +5);
var gapZone = new PrecalculatedDateTimeZone("Test",
new[] { FirstInterval, SecondInterval, ThirdInterval }, tailZone);
var pair = gapZone.GetZoneIntervals(ThirdInterval.LocalEnd + Duration.FromHours(1));
Assert.IsNull(pair.EarlyInterval);
Assert.IsNull(pair.LateInterval);
}
public void GetZoneIntervals_SingleIntervalAroundTailZoneTransition()
{
// Tail zone is fixed at +5. A local instant of one hour before the transition
// from the precalculated zone (which is -5) will therefore give an instant from
// the tail zone which occurs before the precalculated-to-tail transition,
// and can therefore be ignored, resulting in an overall unambiguous time.
var tailZone = new FixedDateTimeZone(Offset.FromHours(5));
var gapZone = new PrecalculatedDateTimeZone("Test",
new[] { FirstInterval, SecondInterval, ThirdInterval }, tailZone);
var pair = gapZone.GetZoneIntervals(ThirdInterval.LocalEnd - Duration.FromHours(1));
Assert.AreEqual(ThirdInterval, pair.EarlyInterval);
Assert.IsNull(pair.LateInterval);
}
public void GetZoneIntervals_GapAroundTailZoneTransition()
{
// Tail zone is fixed at +5. A local instant of one hour after the transition
// from the precalculated zone (which is -5) will therefore give an instant from
// the tail zone which occurs before the precalculated-to-tail transition,
// and can therefore be ignored, resulting in an overall gap.
var tailZone = new FixedDateTimeZone(Offset.FromHours(5));
var gapZone = new PrecalculatedDateTimeZone("Test",
new[] { FirstInterval, SecondInterval, ThirdInterval }, tailZone);
var actual = gapZone.GetZoneIntervals(ThirdInterval.LocalEnd);
var expected = ZoneIntervalPair.NoMatch;
Assert.AreEqual(expected, actual);
}
public void GetZoneIntervals_AmbiguousButTooEarlyInTailZoneTransition()
{
// Tail zone is +10 / +8, with the transition occurring just after
// the transition *to* the tail zone from the precalculated zone.
// A local instant of one hour before after the transition from the precalculated zone (which is -5)
// will therefore be ambiguous, but the resulting instants from the ambiguity occur
// before our transition into the tail zone, so are ignored.
var tailZone = new SingleTransitionZone(ThirdInterval.End + Duration.FromHours(1), 10, 8);
var gapZone = new PrecalculatedDateTimeZone("Test",
new[] { FirstInterval, SecondInterval, ThirdInterval }, tailZone);
var pair = gapZone.GetZoneIntervals(ThirdInterval.LocalEnd - Duration.FromHours(1));
Assert.AreEqual(ThirdInterval, pair.EarlyInterval);
Assert.IsNull(pair.LateInterval);
}
