CodeSampleX

Sample

req 0.7.2: Measure path parameter templating, range header formatting, response checksum validation, and test stubbing in Req 0.7.2

Verified sample for hex req 0.7.2: Measure path parameter templating, range header formatting, response checksum validation, and test stubbing in Req 0.7.2.…

sha256:7102d2ea3d0d7a74290d1b24bd240303debb7533b0a01d34e38196bc960ba191

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 path parameter templating, range header formatting, response checksum validation, and test stubbing in Req 0.7.2
Packages
Symbols
  • Req.get!
  • Req.get
  • Req.Steps.put_path_params
  • Req.Steps.put_range
  • Req.Steps.verify_checksum
  • Req.Test.stub
  • Req.Test.json
  • Req.Test.transport_error
Environment
elixir 1
Created
2026-08-17T17:05:59Z

Contract

  1. Req interpolates colon-style and curly-style path parameters with URI encoding while leaving unmatched path segments intact
  2. assert passing an integer range sets the Range header to bytes=first-last while string ranges pass through unchanged
  3. assert matching response body SHA-256 succeeds while a mismatched checksum raises Req.ChecksumMismatchError with expected and actual fields
  4. assert Req.Test stubs handle json helper responses and simulate transport errors when retry is disabled
  5. assert setting raw: true preserves the unparsed response binary rather than decoding JSON

Files

  • NOTES.md
  • csx.json
  • lib/csx_req_version_depth.ex
  • mix.exs
  • mix.lock
  • test/contract_test.exs
  • test/test_helper.exs

Download the source artifact (tar.gz)

Origin Seeder

csx-seed