sneak
482cd42ebb
When the background saves a network switch after the user approves a site's request, or another popup page saves one, an open popup takes the new network from the stored record inside a save, holding the lock, and checks the record once at start-up for a switch saved before it listened. It then leaves the page as a switch in Settings does: the cut and the redraw are two Settings functions both paths call, and both reset the popup's caches through one function. A switch in Settings is now made inside its own save too, so one picked while a follow waits for the lock is made after it. The popup never switches the network itself. Model: opus-5-5
107 lines
4.2 KiB
JavaScript
107 lines
4.2 KiB
JavaScript
// A chrome.storage stub that behaves like the real one.
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//
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// The real extension storage API is a serialization boundary: `set` writes a
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// structured clone of what it is given, and `get` hands back a structured
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// clone of what is stored. Nothing an extension page holds is ever the object
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// storage holds.
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//
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// A stub that skips the clone aliases them together, and that hides an entire
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// class of defect rather than merely being imprecise. loadState() assigns
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// nested references straight out of the get result, so over an aliasing stub a
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// test can assert "the endpoint was persisted" and pass on a build that never
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// called saveState() at all: the in-memory mutation IS the stored record.
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// Measured, not theorised — with an aliasing `get` restored over the handler
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// fixed in https://git.eeqj.de/sneak/AutistMask/pulls/319, the whole suite
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// passed 794/794 (https://git.eeqj.de/sneak/AutistMask/issues/324).
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//
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// So every test that drives real persistence uses this, and nothing rebuilds
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// a storage stub by hand.
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// One storage area: get, set and remove over its own store, cloning both ways.
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// `changed` is handed what each set or remove changed, in the shape
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// storage.onChanged reports it.
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function makeArea(store, tick, changed) {
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const get = jest.fn(async (key) => {
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tick();
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if (key === undefined || key === null) return structuredClone(store);
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const keys = Array.isArray(key) ? key : [key];
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const out = {};
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for (const k of keys) {
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if (Object.prototype.hasOwnProperty.call(store, k)) {
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out[k] = structuredClone(store[k]);
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}
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}
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return out;
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});
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const set = jest.fn(async (items) => {
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tick();
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const changes = {};
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for (const k of Object.keys(items)) {
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changes[k] = structuredClone({
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oldValue: store[k],
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newValue: items[k],
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});
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store[k] = structuredClone(items[k]);
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}
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changed(changes);
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});
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const remove = jest.fn(async (key) => {
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tick();
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const changes = {};
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for (const k of Array.isArray(key) ? key : [key]) {
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changes[k] = { oldValue: store[k] };
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delete store[k];
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}
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changed(changes);
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});
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return { get, set, remove };
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}
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// `initial` is the starting contents of `storage.local`, keyed as storage is:
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// { autistmask: {...} }. `storage.session` starts empty.
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// `onOp` runs before each operation on either area, for a test that needs to
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// advance a clock or count round trips.
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function makeStorageStub(initial, onOp) {
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const store = initial ? structuredClone(initial) : {};
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const tick = onOp || (() => {});
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// storage.onChanged: after a set or remove has finished, every listener is
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// called with what it changed and the area's name, as the browser calls
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// them for a write by any page or the background.
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const listeners = [];
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const announce = (areaName) => (changes) => {
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Promise.resolve().then(() => {
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for (const fn of listeners) fn(structuredClone(changes), areaName);
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});
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};
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const local = makeArea(store, tick, announce("local"));
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return {
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// Drop this straight in as chrome.storage.
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local,
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session: makeArea({}, tick, announce("session")),
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onChanged: { addListener: (fn) => listeners.push(fn) },
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get: local.get,
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set: local.set,
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remove: local.remove,
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// What is stored in `storage.local`, cloned on the way out: a test can
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// neither observe a later write through an object it read nor reach
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// into the store by mutating one.
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read: (key) =>
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key === undefined
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? structuredClone(store)
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: structuredClone(store[key]),
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// Seed or replace a record without going through the module under
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// test — for standing in as "another page wrote this". Nothing is
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// announced to storage.onChanged, so it also stands in for the time
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// before the browser tells this page of such a write.
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write: (key, value) => {
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store[key] = structuredClone(value);
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},
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};
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}
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module.exports = { makeStorageStub };
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