Nothing measured what the tests reach. scripts/coverage.sh runs the
cargo tests under cargo-llvm-cov in the ipx-coverage image
(Dockerfile.coverage, built by build-image.sh coverage), in a container
held to the image builder's 6 GB and six threads, one crate at a time,
with the same room and load checks: an instrumented build rebuilds every
dependency, the kind of build that took Tower down on 2026-11-04. The
first run stayed under load 8 with 11 GB free; 69% of lines. web.rs and
daemon.rs read low because the browser suite drives them against a
daemon that is not instrumented.
npm run coverage:page runs the browser suite on a build of the page
(IPX_COVERAGE=1) whose script keeps a source map to each web/src file:
web/concat-map.mts maps the joined files line by line and swc takes it
as its input map. Each test's page records V8's coverage
(tests/ui/coverage.ts, which the specs now take test and expect from),
and monocart-coverage-reports writes it file by file: 73% of lines.
build.mjs requires the map helper only for that build, since
Dockerfile.web's Node does not run TypeScript, and not with a top-level
await, which stopped the CommonJS tests requiring build.mjs.
The offline tests move to offline.spec.ts, in TypeScript, and stand
alone (they add their feed and set the read state they need), with what
#391 found untested: another account signing in clears what was kept, a
position saved offline waits and is sent, and pictures past the budget
go oldest first (keepPictures takes the budget, and trims whether or
not anything new came). The fixture JPEGs were a few bytes no browser
could draw; they are real now, and the artwork test checks one draws.
tsconfig.tools.json type-checks the tests' and build's TypeScript, in
npm run typecheck.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
With no network the home-screen app showed nothing: no service worker,
and the lists the page had fetched, full text included, lived only in
its memory.
A service worker (web/sw/sw.ts, TypeScript checked against a worker's
globals by tsconfig.sw.json, built by swc to /sw.js) goes to the network
first for the page and every API read and keeps the answers, so online
nothing is an old copy and #388's version check works as before;
offline the kept copy answers. Scripts named by hash come from what is
kept. Reads, flags and places in an episode that cannot reach the
server wait in an outbox, sent in order when the connection is back
(and new ones queue behind them meanwhile, so none lands out of turn);
a kept list served offline shows the reads waiting there.
Pictures: a worker cannot keep another site's pictures sensibly, since
browsers count each opaque answer as megabytes. ipx now remembers the
picture addresses in item text it sends (bounded, in memory) and
/api/art fetches those as it does artwork, through the guarded client;
the worker keeps them, for unread items, under a 200 MB budget, and
serves them offline in place of the publisher's. Online, pictures still
come from their publisher.
Sign-out, or another account signing in on the device, clears what was
kept. The browser suite blocks the worker except in the offline tests,
since it answers before page.route can.
The fixture JPEGs are placeholders a browser cannot draw; the offline
test uses a real PNG.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
