feat(spotify): implement milestone M4 importers

skills/spotify/tests/text-list.test.ts

@@ -0,0 +1,33 @@
+import assert from "node:assert/strict";
+import { mkdtemp, writeFile } from "node:fs/promises";
+import { join } from "node:path";
+import { tmpdir } from "node:os";
+import { test } from "node:test";
+
+import { parseTextList, readTextList } from "../src/importers/text-list.js";
+
+test("parses text list with comments, blanks, and dedupe", () => {
+  const refs = parseTextList(`
+# favorites
+Radiohead - Karma Police
+
+Radiohead: Karma Police
+// ignored
+Massive Attack - Teardrop
+`);
+
+  assert.equal(refs.some((ref) => ref.artist === "Radiohead" && ref.title === "Karma Police"), true);
+  assert.equal(refs.some((ref) => ref.artist === "Massive Attack" && ref.title === "Teardrop"), true);
+  assert.equal(refs.filter((ref) => ref.artist === "Radiohead" && ref.title === "Karma Police").length, 1);
+});
+
+test("reads text list from file", async () => {
+  const root = await mkdtemp(join(tmpdir(), "spotify-text-"));
+  const path = join(root, "tracks.txt");
+  await writeFile(path, "Radiohead - Karma Police\n");
+
+  const refs = await readTextList(path);
+
+  assert.equal(refs[0].artist, "Radiohead");
+  assert.equal(refs[0].title, "Karma Police");
+});