Sample
rack-test 2.2.0: Assert Rack::Test::UploadedFile defaults content_type to text/plain rather than inferring MIME types from file extensions and default_host defaults to example.org
Verified sample for gem rack-test 2.2.0: Assert Rack::Test::UploadedFile defaults content_type to text/plain rather than inferring MIME types from file…
sha256:a547a5386ea49e912d3240302a7c7194b1828e054d1785eb75c673f73f3711ef
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.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
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 rubygems
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
- Assert Rack::Test::UploadedFile defaults content_type to text/plain rather than inferring MIME types from file extensions and default_host defaults to example.org
- Packages
- Symbols
-
- Rack::Test::UploadedFile
- Rack::Test::UploadedFile#content_type
- Rack::Test::UploadedFile#original_filename
- Rack::Test::Session
- Rack::Test::Session#default_host
- Rack::Test::Session#post
- Rack::Test::DEFAULT_HOST
- Rack::Test::Methods
- Environment
- ruby
- Created
- 2026-08-16T16:44:42Z
Contract
- Rack::Test::UploadedFile.new with an image file path returns 'text/plain' for content_type rather than 'image/png' when the argument is omitted, because UploadedFile defaults content_type to 'text/plain' without inspecting the filename extension.
- assert posting an UploadedFile without an explicit content_type sends 'content-type: text/plain' in the multipart body and parses into params with :type 'text/plain'
- assert passing an explicit content_type argument overrides the default and preserves 'image/png' in both UploadedFile and multipart params
- assert UploadedFile wrapping a StringIO defaults content_type to 'text/plain' when content_type is left unset
- assert Rack::Test::Session defaults default_host to 'example.org' rather than 'localhost' when initialized without an explicit host
Files
- Gemfile
- Gemfile.lock
- NOTES.md
- csx.json
- src/upload_app.rb
- test/contract.rb
- test/fixtures/avatar.png
- test/fixtures/data.json
- test/fixtures/document.pdf