Sample
sinatra 4.2.1: Disprove naive assumptions regarding Sinatra input domain edge behaviors across optional route groups, dot captures, query parameter bare/empty flags, splat immutability, missing-referer redirect fallbacks, and 204 response stripping
Verified sample for gem sinatra 4.2.1: Disprove naive assumptions regarding Sinatra input domain edge behaviors across optional route groups, dot captures…
sha256:afb88de67de6a9cdbd94d1590831708e0ba7e00350a89353e2a72ff206241a0b
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
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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
ruby linux x64 ruby ruby bundler
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| ruby 3 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-16 |
| ruby 3 · linux debian/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · rubygems@1 |
2026-08-18 |
Case
HOW- Goal
- Disprove naive assumptions regarding Sinatra input domain edge behaviors across optional route groups, dot captures, query parameter bare/empty flags, splat immutability, missing-referer redirect fallbacks, and 204 response stripping
- Packages
- Symbols
-
- Sinatra::Base
- Sinatra::IndifferentHash
- Sinatra::Base#params
- Sinatra::Base#redirect
- Sinatra::Base#status
- Rack::Test::Methods
- Environment
- ruby
- Created
- 2026-08-16T17:06:44Z
Contract
- assert an omitted optional route parameter in (/:id)? populates params[:id] as nil with params.key?('id') true while trailing slash /users/ returns 404, bare query flags parse as nil rather than empty strings, and named route params capture across dots
- assert named route parameter :filename captures the entire dotted string archive.tar.gz whereas :name.:ext splits at the final dot
- assert route wildcard splat arrays take precedence over conflicting ?splat query parameters and remain arrays
- assert bare query parameter ?bare yields nil while ?empty= yields empty string and ?count=0 yields string '0'
- assert redirect back without HTTP_REFERER silently redirects to root / with status 302 rather than raising an error
- assert UTF-8 routes and percent-encoded multibyte emoji parameters match and decode into valid UTF-8 encoded strings
- assert status 204 No Content suppresses the returned string body and strips Content-Type and Content-Length headers
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- src/app.rb
- test/contract.rb