Sample
req 0.7.2: Measure absent, nil, empty-list, and empty-string header handling in Req 0.7.2
Verified sample for hex req 0.7.2: Measure absent, nil, empty-list, and empty-string header handling in Req 0.7.2. The contract ran on elixir 1 · linux…
sha256:e52f4de61ddb61a20d40120fde5ea4fc51435b5e9ee5588d1f4eeeafe309ba51
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
elixir 1 linux x64 elixir 1 elixir mix
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| elixir 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:PASS · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · hex@1 |
2026-08-17 |
| elixir 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:PASS · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · hex@1 |
2026-08-18 |
Case
HOW- Goal
- Measure absent, nil, empty-list, and empty-string header handling in Req 0.7.2
- Packages
- Symbols
-
- Req.new
- Req.Request.put_new_header
- Req.Request.get_header
- Req.Request.put_header
- Req.Request.put_headers
- Req.Fields.get_list
- Req.Request.run_request
- Environment
- elixir 1
- Created
- 2026-08-17T04:47:37Z
Contract
- assert Req.new retains nil and empty-list header keys with empty-list values while get_header returns [] for both those keys and missing keys
- assert put_new_header leaves an existing empty-list value unchanged but populates a genuinely missing key
- assert put_header and put_headers replace an existing empty-list value
- assert an empty string is stored as one empty string value and is not replaced by put_new_header
- assert atom header keys hyphenate underscores while string keys preserve underscores as a separate key
- assert the offline adapter sees no flattened wire entries for nil and empty-list headers but sees valid and empty-string headers
Files
- NOTES.md
- csx.json
- mix.exs
- mix.lock
- test/contract.exs
- test/contract_test.exs
- test/test_helper.exs