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Handle ActiveSupport 8.1.3.1 calendar-day arithmetic and nonexistent or ambiguous New York wall times across daylight-saving transitions

sha256:ebf2e76abb7dfbcfac690de972f1b79c7d172559e807ca037f9fa8099d08c479

PUBLISHED L3_CONTRACT_PASS MIT-0

ケース

ゴール: Handle ActiveSupport 8.1.3.1 calendar-day arithmetic and nonexistent or ambiguous New York wall times across daylight-saving transitions HOW
パッケージ: activesupport 8.1.3.1 tzinfo-data 1.2026.3
環境: ruby
作成日: 2026-08-17T01:13:08Z

assert tzinfo-data selects the bundled Ruby data source so the same IANA rules work without an OS zoneinfo directory
assert adding 1.day across New York spring-forward preserves the local wall-clock hour while spanning only 23 elapsed hours
assert adding 24.hours across the same transition preserves 24 elapsed hours and lands one wall-clock hour later
assert TimeZone#local normalizes the nonexistent 02:30 wall time to 03:30 with the daylight offset
assert TimeZone#local_to_utc rejects that nonexistent wall time with TZInfo::PeriodNotFound
assert the dst flag to TimeZone#local_to_utc selects the two UTC instants for the repeated fall-back 01:30
assert TimeZone#local defaults to the daylight occurrence for the ambiguous fall-back wall time

ruby 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-17 · ed25519:d91480838ac982c9