サンプル

Prove that Dart's Digest class retains a mutable reference to its backing byte list, uses reference identity for its bytes property comparison, and that AccumulatorSink only emits a digest upon closing.

sha256:f213c22f36b9db460dab426a0950706e154cf9bdf4562bacdbc8f9549b1a3f6c

ケース

ゴール

Prove that Dart's Digest class retains a mutable reference to its backing byte list, uses reference identity for its bytes property comparison, and that AccumulatorSink only emits a digest upon closing. HOW

パッケージ

crypto 3.0.7 convert 3.1.2

環境

dart

作成日

2026-08-17T02:04:59Z

よくある思い込み

A Digest constructed from a byte list is immutable and copies the backing list to prevent modification of its hash representation, and comparing two digests' bytes directly via the == operator checks for value equality.

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

• assert that a Digest constructed with a mutable List holds that list by reference, so modifying the list externally alters the Digest's bytes, its hex string representation, and its hash code
• assert that comparing raw byte lists of two identical Digest objects directly via the == operator evaluates to false due to Dart's list reference identity check, whereas comparing the Digest objects evaluates to true
• assert that AccumulatorSink remains empty when adding chunks via a chunked conversion sink and only receives a single Digest event when the sink is closed
• assert that calling add on a closed chunked conversion sink throws a StateError

ファイル

• NOTES.md
• csx.json
• pubspec.lock
• pubspec.yaml
• test/contract.dart

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

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