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k6 load testing

Parameterize test data from a file

Medium70 pts~25 min
  • Parameterisation
  • Test data
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-parameterize-test-data-from-a-file

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

Objective

Feed each iteration different search terms and SKUs from a data set instead of one hardcoded value.

Your task

  1. 1Paste the data file as an inline array: [{ q: "mug", sku: "TQA-100" }, { q: "tee", sku: "TQA-200" }, { q: "hoodie", sku: "TQA-300" }, { q: "sticker", sku: "TQA-500" }].
  2. 2Pick a row with data[(__VU + __ITER) % data.length].
  3. 3GET BASE_URL + "/perf/search?q=" + row.q and check status 200 and that results is non-empty.
  4. 4Use { vus: 4, iterations: 20 }.

Acceptance criteria

  • GET /perf/search returns 200
  • Rows are selected via __VU/__ITER
  • No open()/SharedArray
  • ≥ 20 requests are sent
  • At least 20 check() calls pass

Constraints

  • open() and SharedArray are not available in the runner — embed the file content as an inline array.

k6 load testing · Performance Testing · Scripting basics