gerbeur/api/test/routes/youtube.test.ts

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

function ytPage(data: unknown): string {
  return `<script>var ytInitialData = ${JSON.stringify(data)};</script>`;
}

const YT_DATA = {
  metadata: { playlistMetadataRenderer: { title: "My mix" } },
  contents: {
    list: [
      {
        lockupViewModel: {
          contentType: "LOCKUP_CONTENT_TYPE_VIDEO",
          contentId: "vid1",
          metadata: {
            lockupMetadataViewModel: { title: { content: "First" } },
          },
          contentImage: {
            overlays: [{ thumbnailBadgeViewModel: { text: "1:02:03" } }],
          },
        },
      },
      {
        lockupViewModel: {
          contentType: "LOCKUP_CONTENT_TYPE_PLAYLIST",
          contentId: "ignored",
        },
      },
      {
        playlistVideoRenderer: {
          videoId: "vid2",
          title: { runs: [{ text: "Second" }] },
          lengthSeconds: "235",
        },
      },
    ],
  },
};

Deno.test("GET /api/youtube/playlist: resolves and validates the id", async () => {
  let cookie: string | null = null;
  using net = stubNetwork((url, init) => {
    cookie = new Headers(init?.headers).get("cookie");
    return url.searchParams.get("list") === "PLgone"
      ? new Response("", { status: 404 })
      : html(ytPage(YT_DATA));
  });
  const ok = await get<YouTubePlaylist>("/api/youtube/playlist?list=PLgood");
  assertEquals(ok.status, 200);
  assertEquals(ok.data.tracks.length, 2);
  assertEquals(ok.headers.get("cache-control"), "public, max-age=3600");
  // The pre-answered consent cookie keeps EU requests off the consent page.
  assertEquals(cookie, "SOCS=CAI");
  await get("/api/youtube/playlist?list=PLgood"); // cached
  assertEquals(net.calls.length, 1);

  assertEquals((await get("/api/youtube/playlist?list=bad%20id")).status, 400);
  assertEquals((await get("/api/youtube/playlist")).status, 400);
  assertEquals((await get("/api/youtube/playlist?list=PLgone")).status, 502);
  assertFalse(net.calls.some((u) => u.searchParams.get("list") === "bad id"));
});