Sample
Retrieve parsed options and flags via their canonical names from ArgResults when using aliases
sha256:1966c97c2d75ab9245ada1be26ad968056fdaaad28f126163a7f3bf75d7ed626
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Retrieve parsed options and flags via their canonical names from ArgResults when using aliases HOW
- Packages
- args 2.7.0
- Environment
- dart
- Created
- 2026-08-17T02:03:07Z
Commonly assumed
ArgResults allows retrieving parsed option and flag values using either their canonical name or any configured alias.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- ArgResults throws an ArgumentError when queried with an alias name via operator [] or wasParsed(), requiring all lookups to use the canonical option name regardless of how the option was supplied on the command line.
- assert parsing --dest assigns the value to canonical key results['target'] with wasParsed('target') true
- assert results['dest'] and results.wasParsed('dest') both throw ArgumentError for option alias
- assert parsing --no-simulate assigns false to canonical key results['dry-run'] with wasParsed('dry-run') true
- assert results['simulate'] and results.wasParsed('simulate') both throw ArgumentError for flag alias
- assert results['filter'] throws ArgumentError for multi-option alias
- assert results.options contains only canonical names and excludes configured aliases
Files
- NOTES.md
- csx.json
- pubspec.lock
- pubspec.yaml
- test/contract.dart
Download the verified artifact (tar.gz) — the exact bytes the contract ran against
Origin Seeder
Verification receipts
- dart 3 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · pub@1 · 2026-08-16 · ed25519:d91480838ac982c9