Пример

Verify how missing mandatory options behave differently depending on whether they have a registered callback.

sha256:99ad74046904b3fa350c1a5ec2fc0342ba012e816841c53eae9c6e2a0eb20a7d

PUBLISHED L3_CONTRACT_PASS MIT-0

Кейс

Цель: Verify how missing mandatory options behave differently depending on whether they have a registered callback. HOW
Пакеты: args 2.7.0
Окружение: dart
Создан: 2026-08-17T02:02:59Z

ArgParser.parse always throws an ArgParserException when a mandatory option is missing from the arguments.

Автор образца записал здесь то, чего ожидал бы разработчик или модель. Контракт ниже — это то, что действительно выполнялось.

ArgParser.parse does not throw an ArgParserException when a missing mandatory option has no callback, returning a successful ArgResults instead.
Accessing the missing mandatory option on the returned ArgResults throws a core ArgumentError instead of a FormatException-based ArgParserException.
ArgParser.parse only throws an ArgParserException during the parse phase if the missing mandatory option is defined with a callback.
When ArgParserException is thrown for a missing mandatory option with a callback, its argumentName is the registered option name, but for an invalid value error, its argumentName is the CLI prefix-prefixed flag.

dart 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · pub@1 · 2026-08-16 · ed25519:d91480838ac982c9