Drive the app end to end, in CI

[timbogdanov]

Phase 3 of the v0.2.0 plan — proof.

The suite was strong on pure functions, and CI already launched the app and asserted it booted. Nothing drew a stroke, saved a file, reopened it and checked the result.

That gap is not hypothetical. v0.1.0 shipped a macOS build that could not be opened at all, because every check ran against a build nobody had downloaded. This phase deliberately lands before the two large features, on the reasoning that a check written afterwards tends to confirm what already happened.

What it does

tests/e2e/drive.mjs drives the real window through 25 checks — real mouse input through the browser's own event pipeline, the real native save path, the real document round-trip — in the existing smoke job, which already installs xvfb and gives Chromium its sandbox.

It also pins the properties the last two phases added, in the running app rather than in a sandbox:

• the canvas stays paper and ink while the preview carries the duotone;
• dragging the map view moves the territory into negative world coordinates and still renders.

Two traps, recorded so nobody pays twice

Both cost real time to find, and both are documented at the top of the file:

• The renderer's CSP has no unsafe-eval, so every evaluate() must be handed a function. A string gets eval'd, the page blocks it, and the failure reads as a mysterious undefined rather than as a CSP error.
• The canvas calls setPointerCapture(), which throws on a synthetic PointerEvent. Drawing has to go through page.mouse.

Skip, don't fail

It exits 2 — "could not run", not "found a problem" — when electron or a display is missing, so verify-all.sh reports a loud skip on a bare checkout while CI treats it as a hard gate. Verified both paths: 25/25 locally, exit 2 with a bogus --app.

Screenshots upload on failure as well as success, since a failed run is when a picture is worth most.

playwright-core is the first devDependency beyond the build toolchain. Nothing ships with it — the packaged asar is still electron/, app/, package.json and LICENSE.

🤖 Generated with Claude Code

https://claude.ai/code/session_01UCrKKTD2mwHx8Fm1EnJiQ3