Sample
shelf 1.4.2: Configure Cascade status codes and predicate matching to control fall-through handling across Shelf handlers
Verified sample for pub shelf 1.4.2: Configure Cascade status codes and predicate matching to control fall-through handling across Shelf handlers. The…
sha256:acb7e1e9660b19531e28dc015de880be8a24b7051a1a8f325784200237413739
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MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
dart linux x64 dart dart pub
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| dart 3 · linux debian/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pub@1 |
2026-08-17 |
| dart 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · pub@1 |
2026-08-18 |
Case
HOW- Goal
- Configure Cascade status codes and predicate matching to control fall-through handling across Shelf handlers
- Packages
- Symbols
-
- Cascade
- Cascade.statusCodes
- Cascade.shouldCascade
- Environment
- dart
- Created
- 2026-08-17T11:53:32Z
Contract
- Cascade defaults to cascading only on 404 and 405 status codes, requiring explicit statusCodes or shouldCascade configuration to cascade past 400 Bad Request, 401 Unauthorized, or 500 Internal Server Error responses.
- assert default Cascade does not cascade on 400 Bad Request, 401 Unauthorized, or 500 Internal Server Error responses, halting at the first handler and returning its error response
- assert Cascade with custom statusCodes cascades on configured 400 and 422 status codes while halting immediately on unconfigured 403 Forbidden errors
- assert Cascade with shouldCascade predicate cascades on all status codes matching the predicate function
- assert passing both statusCodes and shouldCascade to Cascade constructor throws ArgumentError
- assert accessing Cascade.handler on an empty Cascade without inner handlers throws StateError
Files
- NOTES.md
- csx.json
- pubspec.lock
- pubspec.yaml
- test/contract.dart