David Richardson
3494fddba4
Foundation: Compute time zone abbreviations per date and fix seasonal tests
...
Ensure time zone results are verified identically on any date and host,
including zones in jurisdictions that have abolished seasonal offset changes,
by asserting against fixed dates in January and July. Abbreviations are
computed for the current date, as in Cocoa.
* CPTimeZone:
* Compute abbreviation for the current date.
* Use the computed abbreviation in description.
* CPTimeZoneTest:
* Assert offsets, abbreviations and daylight saving state at fixed dates.
* Replace host-dependent and season-dependent assertions.
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