test: prove wasmbox backend on the REAL wasmdesk/wasmbox Ruby desktop - #9
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Lift the "protocol-faithful harness" caveat on the internal/wasmbox client
backend by proving it end-to-end against the ACTUAL wasmdesk/wasmbox Ruby
compositor (compositor/*.rb on the pure-Go rbgo interpreter, baked into
wasmbox.wasm), not the test/harness.html stand-in.
test/probe-wasmbox-real.mjs (headless Chromium via Playwright):
- boots the real compositor (wasmboxReady + "rbgo compositor: started with N
windows"), served by wasmbox's own unmodified COOP/COEP cmd/serve;
- spawns cmd/gowidgetsclient (CGO=0 js/wasm) as a genuine EXTERNAL client via
the documented globalThis.wasmboxSpawnExternal("clients/gowidgets/worker.js")
— a separate Web Worker + wasm instance over the step-C.1 MessagePort + SAB;
- locates the window by its live focused rect (__wasmboxFocusedRect, no
hardcoded slot) and asserts exact cascade bounds (172,172 260x160);
- asserts the VBox+Label+Button rendered into the composited desktop
(compositor OffscreenCanvas pixels via __wasmboxReadRegion);
- injects a REAL page.mouse.click the compositor routes to the focused window
and asserts the counter goes 0->1 (input -> toolkit.Event through the real
input routing);
- saves test/wasmbox-live-proof-real-desktop-2026-08-09.png.
The wasmbox repository is NOT modified: it is cloned read-only, built and run
as-is; the client is served same-origin via a symlink overlay (documented in
test/README-real-desktop.md). The harness proof (test/probe-wasmbox.mjs +
test/harness.html) is kept as the deterministic CI floor. README + client
README updated to describe both tiers.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Lifts the "protocol-faithful harness" caveat on the
internal/wasmboxclient backend by proving it end-to-end against the actual wasmdesk/wasmbox Ruby desktop (the pure-Go CGO=0 rbgo interpreter runningcompositor/*.rb, baked intowasmbox.wasm), not thetest/harness.htmlstand-in.What's new
test/probe-wasmbox-real.mjs— headless Chromium (Playwright) against the real compositor, served by wasmbox's own unmodified COOP/COEPcmd/serve:wasmboxReady+rbgo compositor: started with N windows, cross-origin isolated).__wasmboxReadRegion).cmd/gowidgetsclient(CGO=0js/wasm) as a genuine external client via the documentedglobalThis.wasmboxSpawnExternal("clients/gowidgets/worker.js")— its own Web Worker + wasm instance over the step-C.1MessagePort+SharedArrayBuffersurface.__wasmboxFocusedRect, no hardcoded slot) and asserts exact bounds(172,172) 260x160.page.mouse.clickthe compositor routes to the focused window; asserts the counter0→1(input →toolkit.Eventthrough the real input routing).test/wasmbox-live-proof-real-desktop-2026-08-09.png.Guarantees
test/README-real-desktop.md).test/probe-wasmbox.mjs+test/harness.html) is kept as the deterministic CI floor (identical wire/SAB/input assertions, no ~80 MB Ruby build).test/*.mjs, one screenshot, one reproduce doc. CI (build/vet/test/100% codec coverage/cross-build/qemu/Xvfb/Wayland) is unaffected.🤖 Generated with Claude Code