visualizer fixes

tests/feed-for-episode.test.ts

@@ -0,0 +1,72 @@
+/**
+ * Unit test for feedForEpisode: resolving the feed behind an episode.
+ *
+ * The critical case is the reported regression — an iTunes show's episode has
+ * `podcastId` set to the RSS feed url (rss-parser:163) while the feed's
+ * `podcast.id` is the iTunes directory id. Those differ, so a strict
+ * `podcast.id` match loses the feed (and its cover, stalling Now Playing art).
+ */
+
+import { describe, expect, test } from "bun:test";
+import { feedForEpisode } from "../src/utils/feed-resolve";
+import { FeedVisibility } from "../src/types/feed";
+import type { Episode } from "../src/types/episode";
+import type { Feed } from "../src/types/feed";
+
+function makeFeed(id: string, feedUrl: string, title = `Show ${id}`): Feed {
+	return {
+		id,
+		podcast: {
+			id,
+			title,
+			description: "",
+			feedUrl,
+			coverUrl: `https://cover/${id}.jpg`,
+			lastUpdated: new Date(),
+			isSubscribed: true,
+		},
+		episodes: [],
+		visibility: FeedVisibility.PUBLIC,
+		sourceId: "test",
+		lastUpdated: new Date(),
+		isPinned: false,
+	};
+}
+
+const episode = (podcastId: string, id = "ep"): Episode => ({
+	id,
+	podcastId,
+	title: "Episode",
+	description: "",
+	audioUrl: "https://audio/ep.mp3",
+	duration: 60,
+	pubDate: new Date(),
+});
+
+describe("feedForEpisode", () => {
+	test("matches when episode.podcastId equals the feed's podcast.id", () => {
+		const f = makeFeed("id-a", "http://a/feed.xml");
+		expect(feedForEpisode([f], episode("id-a"))?.podcast.id).toBe("id-a");
+	});
+
+	test("matches an iTunes show by feed url (podcastId != podcast.id)", () => {
+		// The regression: feed.podcast.id is the directory id, podcastId the
+		// RSS url — a strict id match loses the feed.
+		const feedUrl = "http://itunes.example/feed.xml";
+		const f = makeFeed("itunes-1177068388", feedUrl);
+		const got = feedForEpisode([f], episode(feedUrl));
+		expect(got?.podcast.id).toBe("itunes-1177068388");
+	});
+
+	test("falls back to episode membership when neither id nor feedUrl match", () => {
+		const f = makeFeed("id-b", "http://b/feed.xml");
+		const ep = episode("unrelated", "ep-42");
+		f.episodes = [ep];
+		expect(feedForEpisode([f], ep)?.podcast.id).toBe("id-b");
+	});
+
+	test("returns undefined when no feed matches", () => {
+		const f = makeFeed("id-c", "http://c/feed.xml");
+		expect(feedForEpisode([f], episode("nowhere"))).toBeUndefined();
+	});
+});