test
Use when you need to run tests for React core. Supports source, www, stable, and experimental channels.
Works with
Agent Skills format with YAML frontmatter. Claude Code reads it as-is.
--- name: "test" description: "Use when you need to run tests for React core. Supports source, www, stable, and experimental channels." license: "MIT" --- 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.
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