gerbeur/api/test/routes/bandcamp.test.ts

import { get, html, stubNetwork } from "../helpers.ts";
import { assertEquals } from "@std/assert";
import type { Tralbum } from "../../../shared/player.ts";

function escapeAttr(s: string): string {
  return s.replaceAll("&", "&").replaceAll('"', """);
}

function tralbumPage(data: unknown): string {
  return `<div id="player" data-tralbum="${
    escapeAttr(JSON.stringify(data))
  }"></div>`;
}

const STREAM = "https://t4.bcbits.com/stream/abc/mp3-128/1?p=0&ts=1&t=x";

const ALBUM = {
  item_type: "album",
  artist: "Artist",
  art_id: 12345,
  current: { title: 'The "Album" &amp; more' },
  trackinfo: [
    {
      track_num: 1,
      title: "One",
      duration: 180.5,
      streaming: 1,
      file: { "mp3-128": STREAM },
    },
    {
      track_num: 2,
      title: "Preorder",
      streaming: 1,
      unreleased_track: true,
      file: null,
    },
    {
      track_num: 3,
      title: "",
      streaming: 1,
      file: { "mp3-128": "https://evil.test/x.mp3" },
    },
    {
      track_num: 4,
      title: "Capped",
      streaming: 1,
      is_capped: true,
      file: { "mp3-128": STREAM },
    },
  ],
};

Deno.test("GET /api/bandcamp/tracks: resolves, caches, and forces a refetch", async () => {
  using net = stubNetwork(() => html(tralbumPage(ALBUM)));
  const url = "https://cached.bandcamp.com/album/x";
  const res = await get<Tralbum>(
    `/api/bandcamp/tracks?url=${encodeURIComponent(url)}`,
  );
  assertEquals(res.status, 200);
  assertEquals(res.headers.get("cache-control"), "private, max-age=3600");
  assertEquals(res.data.tracks.length, 4);
  // Same page (different query/case/trailing slash) → cache hit.
  await get(
    `/api/bandcamp/tracks?url=${
      encodeURIComponent("https://CACHED.bandcamp.com/album/x/?from=y")
    }`,
  );
  assertEquals(net.calls.length, 1);
  await get(`/api/bandcamp/tracks?url=${encodeURIComponent(url)}&force=1`);
  assertEquals(net.calls.length, 2);
});

Deno.test("GET /api/bandcamp/tracks: refusals and upstream failures", async () => {
  using _ = stubNetwork((url) => {
    if (url.hostname.startsWith("down")) {
      return new Response("", { status: 503 });
    }
    if (url.hostname.startsWith("json")) return Response.json({});
    return html("<html>no tralbum</html>");
  });
  const status = async (url: string) =>
    (await get(`/api/bandcamp/tracks?url=${encodeURIComponent(url)}`)).status;
  assertEquals(await status("https://example.com/album/x"), 400);
  assertEquals(await status("https://bandcamp.com.evil.test/album/x"), 400);
  assertEquals(await status("http://localhost/album/x"), 400);
  assertEquals(await status("https://down.bandcamp.com/album/x"), 502);
  assertEquals(await status("https://json.bandcamp.com/album/x"), 502);
  assertEquals(await status("https://empty.bandcamp.com/album/x"), 404);
});