verify

name	verify
description	Build, launch and drive the RSTR app to verify changes end-to-end (vite dev server + headless Chromium via Playwright).

Verifying RSTR changes

SvelteKit app. Unit tests (npm test) cover the pure $lib modules; anything touching the pages, canvas rendering or exports needs a real browser.

Launch

npm ci                                  # once
npm run dev -- --port 5199 --strictPort # http://localhost:5199

Routes: /studio (main app, /v2 redirects here), /classic, /prep, / (landing).

Drive (headless Chromium)

In the remote environment Playwright is installed globally, browsers under /opt/pw-browsers. ESM scripts must import it by absolute path — bare import 'playwright' won't resolve outside a package:

import { chromium } from 'file:///opt/node22/lib/node_modules/playwright/index.mjs';
const browser = await chromium.launch();
const context = await browser.newContext({ acceptDownloads: true });

Studio gotchas

• A fresh session (empty localStorage) loads a random sample image and a random built-in preset — some presets have a single layer. Pick a preset deterministically via the select under the "presets" group title (page.selectOption('select:below(:text("presets"))', 'CMY classic')).
• The export buttons (↓ SVG, ↓ PNG) are disabled while segmentation/hatching runs; wait for the PNG button to become enabled before and after every settings change.
• Downloads: Promise.all([page.waitForEvent('download'), page.click(...)]), then download.saveAs(...) and inspect the file.
• To eyeball a canvas/PNG region, crop it in-page (drawImage onto a small canvas, toDataURL()) and save the base64 — screenshots of the full page scale the render down too much.
• To drive the video pipeline headlessly: generate a short webm in-page (canvas captureStream() + MediaRecorder, return it base64) and feed it via page.setInputFiles('input[accept="image/*,video/*"]', {name, mimeType, buffer}). Wait for .timeline to appear, tick the .seq-formats boxes, then click the button with title *"download the sequence"* and unzip the download (stored, no compression).