testing SKILL.md skillA
testing from oliver-kriska/claude-elixir-phoenix is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add oliver-kriska/claude-elixir-phoenix/testing@git:20260724.daea640Pins git:20260724.daea640 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- oliver-kriska/claude-elixir-phoenix
- Path
targets/codex/skills/testing/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260724.daea640, committed Jul 24, 2026
- First version recorded
- Jul 21, 2026
- Size
- 2,913 bytes
- Repository stars
- 572
- License
- MIT
Write or repair Elixir tests with ExUnit, sandbox isolation, async; Use.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Elixir Testing Reference > **Ash projects**: Use `DataCase` with `Ash.Test` helpers; test actions via domain code interfaces, not direct `Repo` calls. See `ash-framework` skill. Quick reference for Elixir testing patterns. ## Iron Laws — Never Violate These 1. **ASYNC BY DEFAULT** — Use `async: true` unless tests modify global state 2. **SANDBOX ISOLATION** — All database tests use Ecto.Adapters.SQL.Sandbox 3. **MOCK ONLY AT BOUNDARIES** — Never mock database, internal modules, or stdlib 4. **BEHAVIOURS AS CONTRACTS** — All mocks must implement a defined `@callback` behaviour 5. **BUILD BY DEFAULT** — Use `build/2` in factories; `insert/2` only when DB needed 6. **NO PROCESS.SLEEP** — Use `assert_receive` with timeout for async operations 7. **VERIFY_ON_EXIT!** — Always call in Mox tests setup 8. **FACTORIES MATCH SCHEMA REQUIRED FIELDS** — Factory definitions must include all fields that have `validate_required` in the schema changeset. Missing fields cause cascading test failures ## Quick Decisions ### Which Test Case? | Testing | Use | |---------|-----| | Controller/API | `use MyAppWeb.ConnCase` | | Context/Schema | `use MyApp.DataCase` | …
Read the whole file at its exact version.
How to install
mdr add oliver-kriska/claude-elixir-phoenix/testing@sha256:a36ee8b86b439330The line at the top of this page pins the label git:20260724.daea640, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_64fbllkuonfyis5h)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 21, 2026 and Jul 24, 2026, about one every day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260724.daea640 latest | 2026-07-24 | daea640 | 2,913 B | A | view · diff |
| git:20260723.d82e8e5 | 2026-07-23 | d82e8e5 | 2,902 B | A | view · diff |
| git:20260721.1a43137 | 2026-07-21 | 1a43137 | 2,955 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2913 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
oliver-kriska/claude-elixir-phoenix · 572 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_64fbllkuonfyis5h GET https://markdownregistry.com/api/v1/resolve?ref=oliver-kriska/claude-elixir-phoenix/testing GET https://markdownregistry.com/api/v1/blob/a36ee8b86b4393306c1c39f16d9641b56e01ee67ec66fe4363972eb60604c901
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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