Fix: throw ArgumentException in GetRegionType for unknown region names#31
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HashidaTKS wants to merge 1 commit into
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Fix: throw ArgumentException in GetRegionType for unknown region names#31HashidaTKS wants to merge 1 commit into
HashidaTKS wants to merge 1 commit into
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… found FirstOrDefault() returned null for unknown region names, and the immediate .RagionType access caused a NullReferenceException with no context about which value was invalid. Throw a descriptive ArgumentException instead so callers get a clear error message pointing to the unknown region name. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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問題点
Utility.GetRegionType(string regionName)でFirstOrDefault()がnullを返した場合、直後の.RagionTypeアクセスでNullReferenceExceptionが発生していた。どの値が問題だったかを示す情報がなく、デバッグが困難だった。
改善内容
FirstOrDefault()の結果を変数に受け取り null チェックを追加ArgumentExceptionをスローして問題の地域名を明示Test plan
RegionTypeが返されることを確認ArgumentExceptionがスローされることを確認🤖 Generated with Claude Code