test — react core testing official, react core testing, ide skills, javascript testing, frontend development tools, declarative ui testing, react fiber hooks testing, experimental channel testing, stable channel testing, setup react testing, Claude Code

v1.0.0
GitHub

About this Skill

Perfect for React Development Agents needing automated testing capabilities for React core. test is a skill for running tests on the React codebase, allowing developers to specify channels and test patterns.

Features

Runs tests with source channel by default
Supports experimental, www, and stable channels
Allows specification of test patterns, such as ReactFiberHooks
Enables testing with variant flags, e.g., __VARIANT__=false
Supports different test channels, including www-modern and www-classic

# Core Topics

react core testing javascript testing frontend development tools declarative ui testing react fiber hooks testing experimental channel testing
facebook facebook
[244.2k]
[50857]
Updated: 3/26/2026

Killer-Skills Review

Decision support comes first. Repository text comes second.

Reviewed Landing Page Review Score: 10/11

Killer-Skills keeps this page indexable because it adds recommendation, limitations, and review signals beyond the upstream repository text.

Original recommendation layer Concrete use-case guidance Explicit limitations and caution Quality floor passed for review Locale and body language aligned
Review Score
10/11
Quality Score
64
Canonical Locale
en
Detected Body Locale
en

Perfect for React Development Agents needing automated testing capabilities for React core. test is a skill for running tests on the React codebase, allowing developers to specify channels and test patterns.

Core Value

Empowers agents to run comprehensive tests for the React codebase across different channels, including source, www, stable, and experimental, using specific test patterns and flags like variant false.

Ideal Agent Persona

Perfect for React Development Agents needing automated testing capabilities for React core.

↓ Capabilities Granted for test

Running tests for ReactFiberHooks with the experimental channel
Automating tests for React codebase with specific flags and test patterns
Debugging React issues using the stable channel

! Prerequisites & Limits

  • Requires React core setup
  • Limited to React codebase testing
  • Channel selection required (source, www, stable, experimental)

Source Boundary

The section below is imported from the upstream repository and should be treated as secondary evidence. Use the Killer-Skills review above as the primary layer for fit, risk, and installation decisions.

Curated Collection Review

Reviewed In Curated Collections

This section shows how Killer-Skills has already collected, reviewed, and maintained this skill inside first-party curated paths. For operators and crawlers alike, this is a stronger signal than treating the upstream README as the primary story.

Reviewed Collection

React Workflow Tools to Install First

Reviewed 2026-04-17

Reviewed on 2026-04-17 against React workflow fit, installation clarity, operator handoff, and frontend delivery usefulness. This page is now positioned as an install-first React entry point instead of a broad UI tooling roundup.

We prioritize this page because React-intent users usually need a shortlist they can install, validate, and carry into real UI delivery loops quickly.

12 entries Maintained through Killer-Skills editorial review with trust, install-path, and operator checks.
After The Review

Decide The Next Action Before You Keep Reading Repository Material

Killer-Skills should not stop at opening repository instructions. It should help you decide whether to install this skill, when to cross-check against trusted collections, and when to move into workflow rollout.

Install Path

Start With Installation And Validation

If this skill is worth continuing with, the next step is to confirm the install command, CLI write path, and environment validation.
Trusted Recheck

Cross-Check Against Trusted Picks

If you are still comparing multiple skills or vendors, go back to the trusted collection before amplifying repository noise.
Workflow

Move To Workflow Collections For Team Rollout

When the goal shifts from a single skill to team handoff, approvals, and repeatable execution, move into workflow collections.
Labs Demo

Browser Sandbox Environment

⚡️ Ready to unleash?

Experience this Agent in a zero-setup browser environment powered by WebContainers. No installation required.

Boot Container Sandbox

FAQ & Installation Steps

These questions and steps mirror the structured data on this page for better search understanding.

? Frequently Asked Questions

What is test?

Perfect for React Development Agents needing automated testing capabilities for React core. test is a skill for running tests on the React codebase, allowing developers to specify channels and test patterns.

How do I install test?

Run the command: npx killer-skills add facebook/react/test. It works with Cursor, Windsurf, VS Code, Claude Code, and 19+ other IDEs.

What are the use cases for test?

Key use cases include: Running tests for ReactFiberHooks with the experimental channel, Automating tests for React codebase with specific flags and test patterns, Debugging React issues using the stable channel.

Which IDEs are compatible with test?

This skill is compatible with Cursor, Windsurf, VS Code, Trae, Claude Code, OpenClaw, Aider, Codex, OpenCode, Goose, Cline, Roo Code, Kiro, Augment Code, Continue, GitHub Copilot, Sourcegraph Cody, and Amazon Q Developer. Use the Killer-Skills CLI for universal one-command installation.

Are there any limitations for test?

Requires React core setup. Limited to React codebase testing. Channel selection required (source, www, stable, experimental).

↓ How To Install

  1. 1. Open your terminal

    Open the terminal or command line in your project directory.

  2. 2. Run the install command

    Run: npx killer-skills add facebook/react/test. The CLI will automatically detect your IDE or AI agent and configure the skill.

  3. 3. Start using the skill

    The skill is now active. Your AI agent can use test immediately in the current project.

Upstream Repository Material

The section below is imported from the upstream repository and should be treated as secondary evidence. Use the Killer-Skills review above as the primary layer for fit, risk, and installation decisions.

Upstream Source

test

Install test, an AI agent skill for AI agent workflows and automation. Works with Claude Code, Cursor, and Windsurf with one-command setup.

SKILL.md
Readonly
Upstream Repository Material
The section below is imported from the upstream repository and should be treated as secondary evidence. Use the Killer-Skills review above as the primary layer for fit, risk, and installation decisions.
Supporting Evidence

Run tests for the React codebase.

Arguments:

  • $ARGUMENTS: Channel, flags, and test pattern

Usage Examples:

  • /test ReactFiberHooks - Run with source channel (default)
  • /test experimental ReactFiberHooks - Run with experimental channel
  • /test www ReactFiberHooks - Run with www-modern channel
  • /test www variant false ReactFiberHooks - Test VARIANT=false
  • /test stable ReactFiberHooks - Run with stable channel
  • /test classic ReactFiberHooks - Run with www-classic channel
  • /test watch ReactFiberHooks - Run in watch mode (TDD)

Release Channels:

  • (default) - Source/canary channel, uses ReactFeatureFlags.js defaults
  • experimental - Source/experimental channel with EXPERIMENTAL flags = true
  • www - www-modern channel with VARIANT flags = true
  • www variant false - www channel with VARIANT flags = false
  • stable - What ships to npm
  • classic - Legacy www-classic (rarely needed)

Instructions:

  1. Parse channel from arguments (default: source)
  2. Map to yarn command:
    • (default) → yarn test --silent --no-watchman <pattern>
    • experimental → yarn test -r=experimental --silent --no-watchman <pattern>
    • stable → yarn test-stable --silent --no-watchman <pattern>
    • classic → yarn test-classic --silent --no-watchman <pattern>
    • www → yarn test-www --silent --no-watchman <pattern>
    • www variant false → yarn test-www --variant=false --silent --no-watchman <pattern>
  3. Report test results and any failures

Hard Rules:

  1. Use --silent to see failures - This limits the test output to only failures.
  2. Use --no-watchman - This is a common failure in sandboxing.

Common Mistakes:

  • Running without a pattern - Runs ALL tests, very slow. Always specify a pattern.
  • Forgetting both www variants - Test www AND www variant false for __VARIANT__ flags.
  • Test skipped unexpectedly - Check for @gate pragma; see feature-flags skill.

Related Skills

Looking for an alternative to test or another official skill for your workflow? Explore these related open-source skills.

View All

flags

Logo of facebook
facebook

Use when you need to check feature flag states, compare channels, or debug why a feature behaves differently across release channels.

★ 244.2k
⑂ 0
Developer

extract-errors

Logo of facebook
facebook

extract-errors is a React error handling skill that automates the process of extracting and assigning error codes, ensuring accurate and up-to-date error messages in React applications.

★ 244.2k
⑂ 0
Developer

fix

Logo of facebook
facebook

fix is a code optimization skill that automates formatting and linting using yarn prettier and linc.

★ 244.2k
⑂ 0
Developer

flow

Logo of facebook
facebook

Use when you need to run Flow type checking, or when seeing Flow type errors in React code.

★ 244.2k
⑂ 0
Developer

Related Collections

View All Collections →
■React Workflow Tools to Install First[12]