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Pressline

Conformance suite

Terminal window
npx @pressline/conformance https://engine.example --secret $ENGINE_SECRET --design <a design id>
✓ health      protocol version 1
✓ design      "Blue heron" sellable, aspect 3:4
✓ preview     https://engine.example/p/heron.png answers 206
✓ render      answered 202 (retry after 500 ms), then 200 ready
✓ idempotent  a repeat request returns the same URL and Spec Hash
✓ printfile   https://engine.example/files/…: 1200×1600 image/png, 812345 bytes
✓ rejects     422 aspect_mismatch: this design is 3:4
Conformant.

The printfile check is Pressline’s own validator from @pressline/contract, so what passes here passes in production. --dpi sets the Spec’s DPI (default 150); --timeout raises the wait for slow renderers; --any-shape skips the 422 check for Engines that pad any Spec. As a test helper, conformance({ baseUrl, secret, designId, fetch }) returns the same report for an in-process handler; the sample Engine’s test suite is exactly that.