Sample
Demonstrate how Equatable.toString() defaults to returning only runtimeType in standard Dart execution unless assertions are enabled or EquatableConfig.stringify is explicitly set.
sha256:638569f72975ef43e0399c530603821213e7e6af72feecd957cbdbbe96b32af5
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Case
- Goal
- Demonstrate how Equatable.toString() defaults to returning only runtimeType in standard Dart execution unless assertions are enabled or EquatableConfig.stringify is explicitly set. HOW
- Packages
- equatable 2.1.0
- Environment
- dart
- Created
- 2026-08-17T02:07:17Z
Commonly assumed
Extending Equatable automatically includes instance properties in toString() output without requiring explicit configuration or debug assert flags.
The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.
Contract
- Calling toString() on an Equatable instance without explicit stringify overrides returns only the runtimeType string 'DefaultItem' rather than 'DefaultItem(a, 42)' when assertions are not enabled.
- Explicitly setting EquatableConfig.stringify = true causes toString() to include properties regardless of assertion mode.
- Overriding get stringify => true on an Equatable class includes properties even when EquatableConfig.stringify is false.
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 · 2026-08-17 · ed25519:d91480838ac982c9