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feat(feed): signature-aware volatile merge with date-banded fetch-more

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This commit is contained in:
Michael Freno
2026-08-13 17:46:27 -04:00
parent 42c48e59fb
commit 878d1e01ab
9 changed files with 406 additions and 57 deletions
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24
tests/feed-refresh.test.ts
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@@ -42,7 +42,7 @@ let feedAId = "";
/** When set, the server 503s this path — simulates a feed going down. */
let failPath: string | null = null;
/** XML for the current served episode list (episode ids = feedUrl#index). */
/** XML for the current served episode list (episode ids derive from enclosure URLs). */
function feedXml(episodes: ServedEpisode[], origin: string): string {
const items = episodes
.map(
@@ -79,6 +79,18 @@ beforeAll(() => {
if (failPath && url.pathname === failPath) {
return new Response("feed unavailable", { status: 503 });
}
// A dedicated single-episode feed for the failed-refresh test:
// it must not depend on (or shrink) the shared servedEpisodes
// list, which other tests' feeds read on refreshAllFeeds.
if (url.pathname === "/flaky.xml") {
return new Response(
feedXml(
[{ title: "Ep 1", date: "2026-08-01T00:00:00Z" }],
url.origin,
),
{ headers: { "Content-Type": "application/rss+xml" } },
);
}
if (url.pathname.endsWith(".xml")) {
return new Response(feedXml(servedEpisodes, url.origin), {
headers: { "Content-Type": "application/rss+xml" },
@@ -139,8 +151,9 @@ test("refresh with a genuinely new episode bumps lastUpdated", async () => {
test("a failed refresh does not wipe the feed's episodes", async () => {
const store = useFeedStore();
const savedEpisodes = servedEpisodes;
servedEpisodes = [{ title: "Ep 1", date: "2026-08-01T00:00:00Z" }];
// /flaky.xml serves its own fixed single-episode feed (see server route)
// so the shared servedEpisodes list stays untouched for feedA, which
// refreshAllFeeds below also refreshes.
const feedUrl = `http://127.0.0.1:${server!.port}/flaky.xml`;
const feed = await store.addFeed(makePodcast(feedUrl), "test-source");
expect(feed).not.toBeNull();
@@ -161,11 +174,6 @@ test("a failed refresh does not wipe the feed's episodes", async () => {
failPath = null;
store.removeFeed(feedId);
// Restore the shared served content: with union merge semantics (volatile
// episodes survive refreshes) this feed keeps its larger in-memory window,
// so later tests must serve the same episodes they added — a shrink here
// would make the next test's "unchanged" refresh genuinely different.
servedEpisodes = savedEpisodes;
});
test("refreshAllFeeds keeps unchanged feeds' order and timestamps", async () => {