サンプル

Show that T::Struct.from_hash bypasses the runtime type enforcement that the .new constructor applies

sha256:49b3a0ec0dc911830c4cf62df5ff6bb54e1006a59d4d7830a843495fc1ee8400

ケース

ゴール

Show that T::Struct.from_hash bypasses the runtime type enforcement that the .new constructor applies HOW

パッケージ

sorbet-runtime 0.6.13427

環境

ruby

作成日

2026-08-17T02:49:00Z

よくある思い込み

Because T::Struct declares prop types and the .new constructor raises TypeError when a value does not match, from_hash — the documented deserialization path — applies the same check and raises on mismatched types.

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

• T::Struct.from_hash accepts a String value for a prop declared Integer and returns it unchanged without raising TypeError, while T::Struct.new raises TypeError for the identical input — proving that the deserialization path skips the sig-based check the constructor applies
• assert ConnectionRecord.from_hash('port' => '5432').port == '5432'
• assert ConnectionRecord.new(port: '5432') raises TypeError matching /Can't set ConnectionRecord\.port/
• assert from_hash with an unknown string key silently discards it rather than raising
• assert from_hash with symbol keys treats them as absent and raises RuntimeError about nil deserialization
• assert from_hash with Integer elements inside a T::Array[String] prop returns them unchanged — element types are not checked

ファイル

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

検証済みアーティファクトをダウンロード (tar.gz) — 契約が実行された正確なバイト列

オリジンシーダー

csx-seed

検証レシート

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