Stand up a client test suite on Node's built-in runner (no vitest/jsdom — the
targeted modules are plain ESM with no browser/DOM deps) and cover the
meaningful client logic, not presentational components:
- api/client.js: the fetch wrapper — always sends the session cookie, maps a
non-2xx response to a thrown ApiError (body.message → statusText fallback),
resolves an empty body to null, sets Content-Type for JSON but NOT for raw
FormData uploads, and builds/encodes query strings + path params.
- lib/shardEvents.js: describe() across event kinds (payload vs live frame,
actor name→acct→"Someone" fallback, sale pluralization, champ.update
branches) and the categoryOf table-consistency check.
- data/regionBuckets.js: the presence roll-up, incl. the first-match-wins
ordering and the "buckets always reconcile to the total" invariant.
- lib/heroLayout.js: parseLayout's version/shape guard and heroBackground's
default-vs-custom branch.
- lib/format.js: the date/label formatters + relative-time buckets.
Wiring so these actually count:
- client/package.json gains a `test` script (node --test);
- pr-checks.yml runs the client tests as a PR gate;
- sonarqube.yml generates a client LCOV report and sonar-project.properties
feeds it alongside the server report (SF paths resolve to client/src/...).
43 client tests; coverage on the tested modules: format/regionBuckets/
heroLayout 100%, api client 86%, shardEvents 80%.
Co-Authored-By: Claude <noreply@anthropic.com>
