--- name: artillery-3c9826567f89 description: When the user wants to perform load testing or performance testing using Artillery with YAML-based scenario definitions. Also use when the user mentions "artillery," "YAML load test," "WebSocket testing," "Socket.io load test," "scenario-based load testing," or "artillery run." For JavaScript-based load testing, see k6. license: Apache-2.0 metadata: author: terminal-skills version: "1.0.0" category: development tags: "load-testing, performance, websocket, yaml" --- # Artillery ## Overview You are an expert in Artillery, the modern load testing toolkit. You help users define test scenarios in YAML, configure phases for ramping traffic, test HTTP APIs and WebSocket/Socket.io services, write custom JavaScript functions for complex flows, and generate HTML reports. You understand Artillery's plugin ecosystem and CI integration. ## Instructions ### Initial Assessment Before creating a test scenario: 1. **Protocol** — HTTP, WebSocket, Socket.io, or gRPC? 2. **Flow** — Single endpoint or multi-step user journey? 3. **Load profile** — Constant rate, ramp-up, or phased? 4. **Success criteria** — Acceptable latency, error rate? ### Basic HTTP Load Test ```yaml # load-test.yml — Artillery scenario testing an HTTP API. # Ramps from 5 to 50 requests per second over 3 phases. config: target: "https://api.example.com" phases: - duration: 60 arrivalRate: 5 name: "Warm up" - duration: 120 arrivalRate: 25 name: "Ramp up" - duration: 60 arrivalRate: 50 name: "Peak load" defaults: headers: Content-Type: "application/json" scenarios: - name: "Browse and purchase" flow: - get: url: "/products" capture: - json: "$.products[0].id" as: "productId" - think: 2 - get: url: "/products/{{ productId }}" - think: 1 - post: url: "/cart" json: productId: "{{ productId }}" quantity: 1 ``` ### WebSocket Testing ```yaml # websocket-test.yml — Artillery scenario testing a WebSocket server. # Connects, sends messages, and validates responses. config: target: "wss://ws.example.com" phases: - duration: 60 arrivalRate: 10 engines: ws: {} scenarios: - engine: "ws" flow: - send: payload: '{"type": "subscribe", "channel": "updates"}' - think: 1 - send: payload: '{"type": "message", "text": "hello"}' - think: 5 ``` ### Socket.io Testing ```yaml # socketio-test.yml — Artillery scenario for Socket.io real-time apps. # Simulates users joining rooms and exchanging messages. config: target: "http://localhost:3000" phases: - duration: 60 arrivalRate: 20 engines: socketio: transports: ["websocket"] scenarios: - engine: "socketio" flow: - emit: channel: "join" data: room: "general" username: "user_{{ $randomNumber(1, 1000) }}" - think: 2 - emit: channel: "message" data: text: "Hello from Artillery" - think: 3 ``` ### Custom JavaScript Functions ```yaml # custom-flow.yml — Artillery scenario with custom JS processing. # Uses beforeRequest and afterResponse hooks for dynamic data. config: target: "https://api.example.com" phases: - duration: 120 arrivalRate: 10 processor: "./helpers.js" scenarios: - flow: - function: "generateUser" - post: url: "/users" json: name: "{{ name }}" email: "{{ email }}" beforeRequest: "addAuthToken" afterResponse: "logResponse" ``` ```javascript // helpers.js — Custom Artillery processor functions. // Generates dynamic data and handles auth tokens. module.exports = { generateUser(context, events, done) { context.vars.name = `user_${Date.now()}`; context.vars.email = `user_${Date.now()}@test.com`; return done(); }, addAuthToken(req, context, events, done) { req.headers = req.headers || {}; req.headers['Authorization'] = `Bearer ${context.vars.token || 'test-token'}`; return done(); }, logResponse(req, res, context, events, done) { if (res.statusCode !== 200) { console.log(`Error: ${res.statusCode} on ${req.url}`); } return done(); }, }; ``` ### Running Artillery ```bash # run-artillery.sh — Common Artillery commands. # Install, run tests, and generate reports. # Install npm install -g artillery # Run a test artillery run load-test.yml # Generate HTML report artillery run --output results.json load-test.yml artillery report results.json --output report.html # Quick test (no YAML needed) artillery quick --count 100 --num 10 https://api.example.com/health ``` ### CI Integration ```yaml # .github/workflows/artillery.yml — Run Artillery in GitHub Actions. # Posts HTML report as an artifact. name: Load Test on: push: branches: [main] jobs: artillery: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - uses: actions/setup-node@v4 with: node-version: 20 - run: npm install -g artillery - run: artillery run --output results.json tests/load-test.yml - run: artillery report results.json --output report.html - uses: actions/upload-artifact@v4 if: always() with: name: artillery-report path: report.html ``` --- Source attribution: TerminalSkills Original project: https://github.com/TerminalSkills/skills/blob/3bfbf7f76459d89422eddc0e5f572ad0e6c393c9/skills/artillery/SKILL.md License: Apache-2.0 License information: https://www.apache.org/licenses/LICENSE-2.0 Original upstream instructions; downloaded from Mega AI Hub. ## Upstream license notice Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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