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k6 load testing

Validate data integrity under load

Hard120 pts~45 min
  • Data integrity
  • Session isolation
Practice app · Checkout Service

A load-testable checkout service with realistic latency that degrades under concurrency, plus a live metrics view.

BASE_URL
/api/practice
Console app
/lab/performance-testing-validate-data-integrity-under-load

Your starter code already declares BASE_URL — call the API relative to it.

Objective

Verify that concurrent sessions stay isolated and every response carries correct data.

Your task

  1. 1Set options { vus: 5, iterations: 20 }.
  2. 2Each iteration: login, then POST /perf/cart with the session's token + csrf → check 200 and a non-empty cartId.
  3. 3Send a second cart request with a wrong X-CSRF-Token → check 403 and error.code CSRF_MISMATCH.
  4. 4GET BASE_URL + "/perf/checkout" → check status "confirmed" and a non-empty orderId.

Acceptance criteria

  • Login, cart and checkout return 200
  • The CSRF header is sent
  • At least 60 check() calls pass

k6 load testing · Performance Testing · Assertions & validation