Jest

Jest patterns for React Native style tests: TDD discipline, mock factory functions, module and GraphQL hook mocking, custom render helpers and anti-patterns to avoid.

ChrisWiles/claude-code-showcase

Vitest API and config reference (Jest-compatible) — mocking with vi., spies, fake timers, coverage configuration, fixtures, snapshots, and test filtering.

supabase/supabase

Reviews newly written or edited tests against nine rules that cut test bloat, such as mock-heavy checks and near-duplicate cases, before they are committed.

amElnagdy/guard-skills

Generate React Native Reanimated animation code for React Native apps.

gluestack/gluestack-ui

Vitest testing framework patterns for test setup, async testing, mocking with vi., snapshots, and test performance (formerly test-vitest).

pixel-point/animate-text

Reference guide for writing and running Langflow frontend accessibility tests with axe (Jest) and IBM Equal Access (Playwright page.runA11yScan).

langflow-ai/langflow

Enforce Sentry React Native SDK test conventions for naming, structure, mocking, and fixtures with Jest.

getsentry/sentry-react-native

Designs and implements testing strategies for any codebase. An agent skill from CloudAI-X/claude-workflow-v2.

CloudAI-X/claude-workflow-v2

Guides an agent through probing an unfamiliar project's test setup, then choosing a red-light-first testing strategy matched to the task type.

huiliyi37/Tianshu-harness

Find and safely remove unused ("dead") npm dependencies in RedisInsight using a grep + leaf-check + build-gate recipe.

redis/RedisInsight

Guide a new contributor through the rundeck OSS repo. An agent skill from rundeck/rundeck.

rundeck/rundeck

Write Jest integration and unit tests for the Grafana Synthetic Monitoring app using React Testing Library, MSW, and src/test helpers.

grafana/synthetic-monitoring-app

Plan, implement, and debug frontend tests: unit/integration/E2E/visual/a11y.

chongdashu/vibejam-starter-pack

Test @data-client/react with renderDataHook and mountDataClient - jest unit tests, fixtures, interceptors, MockResolver, mock responses, nock HTTP mocking, fake timers for polling/subscription…

reactive/data-client

A skill your agent uses when building, running, testing, or bundling JavaScript/TypeScript applications.

galfrevn/apollo

Write Vue component unit tests. An agent skill from rundeck/rundeck.

rundeck/rundeck

Plan, implement, and debug frontend tests: unit/integration/E2E/visual/a11y.

chongdashu/vibejam-starter-pack

Verify Google Sheets Argento locally: launch the Node build/Jest stack and the static docs site, then prove formula behavior (DOLAR, CEDEAR, caución) and the public CEDEAR JSON.

ferminrp/google-sheets-argento

Write tests for datadog-ci commands and helpers using established repository patterns.

DataDog/datadog-ci

Run unit tests for the Cosmos Explorer project. An agent skill from Azure/cosmos-explorer.

Azure/cosmos-explorer

Write or extend Jest tests for OpenPlayerJS to this repo's exact conventions — makeCore factories, typed internals handles instead of as any, media property mocking, fake timers, ads/vast mocks, and…

openplayerjs/openplayerjs

Drives test-first development through the RED, GREEN, REFACTOR cycle, with a config switch that selects between TDD and a DDD workflow for existing code.

modu-ai/moai-adk

Configure Bun's built-in test runner with Jest-compatible APIs.

involvex/youtube-music-cli

Jest + React Testing Library best practices for Wonder Blocks unit tests.

Khan/wonder-blocks

AutoAnimate (@formkit/auto-animate) zero-config animations for React.

secondsky/claude-skills

Migrates an application to Ts.ED v8 from v7, with pointers for v6 and plain Express apps.

tsedio/tsed

Test Radix NG primitives across every layer and pick the RIGHT one for a change: Vitest unit (zoneless), jest-axe a11y, Playwright browser regression (apps/visual-regression), SSR…

radix-ng/primitives

Enforces strict red-green-refactor, with a failing test first, the minimum code to pass it, then cleanup, and a quick reference for common test runners.

zereight/gitlab-mcp

Migrate a TypeScript/JavaScript codebase from @cashu/cashu-ts v2 to v4.

shopstr-eng/shopstr

Test @data-client/vue composables and components - renderDataCompose, mountDataClient, fixtures, jest, nock HTTP mocking, polling/subscription tests with fake timers, useSuspense, useLive…

reactive/data-client

Test-writing patterns for JS/TS, Python, Go, and Rust (unit, integration, E2E, visual regression).

travisjneuman/.claude

Write tests using React Native Testing Library (RNTL) v13 and v14 (@testing-library/react-native).

callstackincubator/agent-skills

Write and review React/TypeScript tests for Sentry's frontend using Jest and React Testing Library.

getsentry/sentry

Server rendering and testing for react-horizontal-scrolling-menu: the library is client-only ('use client' required in React Server Components, else "createContext is not a function"), SSR first…

asmyshlyaev177/react-horizontal-scrolling-menu

Write unit and integration tests for Ts.ED v8 applications with Vitest (Jest as a fallback) - vitest.config with unplugin-swc, PlatformTest.create/invoke/reset from @tsed/platform-http/testing…

tsedio/tsed

Unit/integration testing standards for RedisInsight using Jest and Testing Library: test structure, the renderComponent helper, faker for test data, mocking patterns, and waitFor instead of fixed…

redis/RedisInsight

Create backend tests for Rundeck (unit, API, functional). An agent skill from rundeck/rundeck.

rundeck/rundeck

Detect drift across ALL the sync surfaces /init vendors into a project — .adlc/templates/.md, .adlc/partials/.sh, .adlc/ETHOS.md, and the workflow runtime (.adlc/workflows/adlc-sprint.workflow.js +…

atelier-fashion/adlc-toolkit

Verify a Nexus change — pick a Jest lane, write a test that can actually fail, run the in-app Obsidian CLI loop, drive the eval harness, or fix a shipped-docs drift failure.

ProfSynapse/nexus

Design CI/CD pipelines that run test suites. An agent skill from petrkindlmann/qa-skills.

petrkindlmann/qa-skills

Conventions for Handsontable's Jest unit and TypeScript type tests: where files go, how to run them, mocking limits and when to write an E2E test instead.

handsontable/handsontable

Migrate an Nx repo package's unit tests from Jest to Vitest, reusing the shared setup that packages/workspace established.

nrwl/nx

Repo-specific guide to the Ever Works monorepo (ever-works/ever-works) — its pnpm + Turborepo layout, the per-workspace test runners (Jest vs Vitest vs Playwright), file-naming and import-alias…

ever-works/ever-works

Use the shared TestProvider in workflowsmanagement Jest tests instead of hand-wiring KibanaContextProvider, QueryClientProvider, WorkflowsContextProvider, MemoryRouter, I18nProvider, and the Redux…

elastic/kibana

Run local validation checks for ZenUML web-sequence before pushing, opening a PR, or merging.

ZenUml/web-sequence

Lightning Web Components with PICKLES methodology and 165-point scoring.

forcedotcom/sf-skills

Single entry point for migrating Kibana Functional Test Runner (FTR) tests to Scout.

elastic/kibana

Writes and reviews modern JavaScript: ES2023+ syntax, async/await, ESM modules, Node.js and browser APIs, with linting, leak checks and Jest tests.

Jeffallan/claude-skills