gerbeur/api/test/remote/bandcamp-tralbum.test.ts

import "../setup.ts";
import { assert, assertEquals } from "@std/assert";
import { parseTralbum } from "../../remote/bandcamp-tralbum.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("parseTralbum: tracks, streamability and art", () => {
  const album = parseTralbum(
    tralbumPage(ALBUM),
    "https://a.bandcamp.com/album/x",
  );
  assert(album);
  assertEquals(album.itemType, "album");
  assertEquals(album.artist, "Artist");
  // A title containing a literal &amp; survives the single-pass decode.
  assertEquals(album.title, 'The "Album" &amp; more');
  assertEquals(album.artworkUrl, "https://f4.bcbits.com/img/a12345_16.jpg");
  assertEquals(album.tracks.map((t) => t.streamable), [
    true,
    false,
    false,
    true,
  ]);
  assertEquals(album.tracks[0].streamUrl, STREAM);
  assertEquals(album.tracks[0].duration, 180.5);
  // A non-bcbits stream host is never relayed.
  assertEquals(album.tracks[2].streamUrl, null);
  assertEquals(album.tracks[2].title, "Track 3");
  assert(album.tracks[3].capped);
});

Deno.test("parseTralbum: pages it can't use", () => {
  assertEquals(parseTralbum("<html></html>", "u"), null);
  assertEquals(parseTralbum(`<div data-tralbum="{oops"></div>`, "u"), null);
  assertEquals(
    parseTralbum(tralbumPage({ ...ALBUM, hasAudio: false }), "u"),
    null,
  );
  assertEquals(
    parseTralbum(
      tralbumPage({ ...ALBUM, trackinfo: [ALBUM.trackinfo[1]] }),
      "u",
    ),
    null,
  );
});