public void CanLookupLocalTimeZoneById()
{
// Note that this test can fail legitimately, as there are valid situations where TimeZoneInfo.Local returns
// a time zone that is not one of the system time zones. These are unlikely to be cases that we encounter
// in practice, though.
// However, there _are_ cases where we can't fetch the local timezone at all (sigh, Mono), so we'll have to
// skip this test then.
TimeZoneInfo local = null;
try
{
local = TimeZoneInfo.Local;
}
catch (TimeZoneNotFoundException)
{
// See https://bugzilla.xamarin.com/show_bug.cgi?id=11817
Assert.Ignore("Test requires ability to fetch BCL local time zone");
}
if (local == null)
{
// https://github.com/nodatime/nodatime/issues/235#issuecomment-80932079
Assert.Ignore("Test requires ability to fetch BCL local time zone (was null)");
}
// Now that we have our BCL local time zone, we should be able to look it up in the source.
var source = new BclDateTimeZoneSource();
string id = source.MapTimeZoneId(local); // in this case, just returns the Id, but required in general.
// These lines replicate how DateTimeZoneCache implements GetSystemDefault().
Assert.Contains(id, source.GetIds().ToList(), "BCL local time zone ID should be included in the source ID list");
var zone = source.ForId(id);
Assert.IsNotNull(zone); // though really we only need to test that the call above didn't throw.
}
public void FixedOffsetDoesNotEqualBuiltIn()
{
// Only a few fixed zones are advertised by Windows. We happen to know this one
// is wherever we run tests :)
// Unfortunately, it doesn't always exist on Mono (at least not on the Raspberry Pi...)
string id = "UTC-02";
var source = new BclDateTimeZoneSource();
if (!source.GetIds().Contains(id))
{
Assert.Ignore("Test assumes existence of BCL zone with ID: " + id);
}
var zone = source.ForId(id);
Assert.AreNotEqual(DateTimeZone.ForOffset(Offset.FromHours(-2)), zone);
Assert.AreEqual(id, zone.Id);
Assert.AreEqual(Offset.FromHours(-2), zone.GetZoneInterval(NodaConstants.UnixEpoch).WallOffset);
}