react-testing SKILL.md skillA

react-testing from fusengine/agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add fusengine/agents/react-testing@git:20260927.43a351c

Pins git:20260927.43a351c in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: fusengine/agents
Path: plugins/react-expert/skills/react-testing/SKILL.md
Versions recorded: 6
Latest version: git:20260927.43a351c, committed Sep 27, 2026
First version recorded: Jan 31, 2026
Size: 5,871 bytes
Repository stars: 36
License: MIT

Testing Library for React 19 - render, screen, userEvent, waitFor, Suspense. Use when writing tests for React components with Vitest.

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

<objective>
Tests React 19 components with Testing Library and Vitest: user-centric queries prioritized by accessibility (`getByRole` first, `getByTestId` last resort), `userEvent` for realistic interactions (never `fireEvent`), `findBy`/`waitFor` for async assertions (never `setTimeout`), and MSW for API mocking (never direct fetch mocking).

Also covers testing React 19 features (`useActionState`, `use()`), custom hooks, Suspense boundaries, error boundaries, and accessibility audits with axe-core. Provides Vitest configuration and 9 ready-to-copy test templates. This is a testing-methodology skill layered on top of the React skills (react-19, react-state, react-forms) — it doesn't teach those APIs themselves, only how to test components that use them.
</objective>

# React Testing Library

Test React components the way users interact with them.

## Agent Workflow (MANDATORY)

Before ANY implementation, spawn 3 agents in parallel, one `Agent` call each with a `name`:

1. **fuse-ai-pilot:explore-codebase** - Analyze existing test patterns
2. **fuse-ai-pilot:research-expert** - Verify latest Testing Library docs via Context7/Exa
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add fusengine/agents/react-testing@sha256:31782612072c7484

The line at the top of this page pins the label git:20260927.43a351c, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_ke5dog2tfinssfpv.svg)](https://markdownregistry.com/a/art_ke5dog2tfinssfpv)

8 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 6 versions of this file, between Jan 31, 2026 and Sep 27, 2026, about one every 48 days.

version	committed	commit	size	audit
git:20260927.43a351c latest	2026-09-27	43a351c	5,871 B	A	view · diff
git:20260904.5f1d30f	2026-09-04	5f1d30f	5,870 B	A	view · diff
git:20260729.3b91eed	2026-07-29	3b91eed	5,841 B	A	view · diff
git:20260207.0a3cd21	2026-02-07	0a3cd21	5,060 B	A	view · diff
git:20260131.b40f0a1	2026-01-31	b40f0a1	5,044 B	A	view · diff
git:20260131.7d8568c	2026-01-31	7d8568c	5,615 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (5871 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

GitHub

fusengine/agents · 36 stars · license MIT · pushed 2026-10-30 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ke5dog2tfinssfpv
GET https://markdownregistry.com/api/v1/resolve?ref=fusengine/agents/react-testing
GET https://markdownregistry.com/api/v1/blob/31782612072c74840ba20f8252cba312baceecc62d1b6601787d38ef627534db

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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