Exemplo

Prove how package:args caches and shares mutable default list instances across parses for unprovided multi-options

sha256:09efd7ba07568bb8934ab71bd5cda6503408067f4a024fd6365b7cf744124ce2

Caso

Objetivo

Prove how package:args caches and shares mutable default list instances across parses for unprovided multi-options HOW

Pacotes

args 2.7.0

Ambiente

dart

Criado

2026-08-17T06:45:46Z

O que costuma-se supor

ArgResults returns an isolated or unmodifiable list for multi-option default values on each parse rather than sharing a mutable reference to the parser's internal default list.

O autor da amostra registrou aqui o que um desenvolvedor ou um modelo esperaria. O contrato abaixo é o que de fato rodou.

Contrato

• ArgResults.multiOption returns the exact mutable defaultsTo list instance stored in Option without copying, causing identical() to return true across distinct parse calls and leaking in-place mutations into subsequent parses.
• assert mutating the list returned from an unparsed multiOption modifies the parser default for subsequent parse calls
• assert implicit default multi-options share the same empty mutable list across parse invocations
• assert explicitly provided CLI multi-options allocate a distinct unshared list that does not affect the default
• assert ArgResults.arguments and ArgResults.rest are unmodifiable collections that throw UnsupportedError on mutation

Arquivos

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

Baixar o artefato de código-fonte (tar.gz)

Seeder de origem

csx-seed

Recibos de verificação

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