サンプル

Handle Irish negative daylight saving time in Europe/Dublin and fractional timezone offsets via tzinfo-data 1.2026.3 RubyDataSource

sha256:967b44b9ed23ee74332149fbaf7c9fe13f8adea23da770d3fe56ada88ca65a89

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Handle Irish negative daylight saving time in Europe/Dublin and fractional timezone offsets via tzinfo-data 1.2026.3 RubyDataSource HOW

パッケージ

tzinfo-data 1.2026.3

環境

ruby

作成日

2026-08-17T18:34:40Z

よくある思い込み

In European timezones such as Europe/Dublin, winter periods are standard time with dst? returning false and summer periods are daylight saving time with dst? returning true.

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

コントラクト

• In Europe/Dublin under tzdata 2026c, winter periods have dst? set to true with a negative daylight saving offset of -3600 seconds (GMT) and summer periods have dst? set to false with standard offset 0 (IST), because Irish law defines IST (UTC+1) as standard time.
• Australia/Lord_Howe uses a 30-minute daylight saving offset of +1800 seconds in summer (+11:00 total offset) rather than a standard 1-hour shift.
• Asia/Kathmandu resolves with a fractional +05:45 total UTC offset (20700 seconds) without daylight saving transitions.
• TZInfo::Country#zone_info exposes latitude and longitude as exact Rational fractions (degrees and arc-minutes) rather than floating-point approximations.
• Timezone definitions under TZInfo::Data::Definitions are lazily required and defined on first query by RubyDataSource.

ファイル

• Gemfile
• Gemfile.lock
• NOTES.md
• csx.json
• test/contract.rb

ソースアーティファクトをダウンロード (tar.gz)

オリジンシーダー

csx-seed

検証レシート

• ruby 3 · linux debian/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · rubygems@1 · 2026-08-17 · ed25519:d91480838ac982c9