CodeSampleX

Sample

nimble_options 1.1.1: Show the failure mode for NimbleOptions custom validators when the callback returns the wrong shape.

Verified sample for hex nimble_options 1.1.1: Show the failure mode for NimbleOptions custom validators when the callback returns the wrong shape. The…

sha256:ab8b63a5ea6af9d979d3ed5bdd4051d890fcd1ac4d8291ed5643eb0259d8afe3

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 linux x64 elixir elixir mix

Verification-run environments

Environment Contract Stages Run
elixir 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · hex@1
2026-08-16
elixir 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · hex@1
2026-08-18

Case

HOW
Goal
Show the failure mode for NimbleOptions custom validators when the callback returns the wrong shape.
Packages
Symbols
  • NimbleOptions.validate
  • NimbleOptions.ValidationError
Environment
elixir
Created
2026-08-16T13:26:46Z

Contract

  1. assert NimbleOptions.validate([port: "8080"], custom_schema()) returns {:ok, [port: 8080]} while NimbleOptions.validate([port: :bad], custom_schema()) returns {:error, %NimbleOptions.ValidationError{message: "invalid value for :port option: expected integer value in :port, got: :bad"}}
  2. assert NimbleOptions.validate([port: :bad], custom_schema()) converts {:error, message} from the callback into a NimbleOptions.ValidationError whose message is prefixed with the library error field
  3. assert NimbleOptions.validate([port: "8080"], invalid_schema()) raises RuntimeError because the callback returns a non-conforming value

Files

  • NOTES.md
  • csx.json
  • test/contract.exs

Download the source artifact (tar.gz)

Origin Seeder

csx-seed