antisocial/test/bluesky.test.ts

import assert from 'node:assert/strict';
import { test } from 'node:test';
import { mediaFromEmbed, selfThread, toPost } from '../src/platforms/bluesky.ts';
import { fixture } from './helpers.ts';

const URL_ = 'https://bsky.app/profile/example/post/abc';

/** The three single-post fixtures are captured `thread.post` objects. */
function single(name: string) {
  return toPost({ post: fixture(`bluesky/${name}.json`) }, URL_);
}

test('a text-only post carries no media', () => {
  const post = single('text-only');
  assert.equal(post.platform, 'bluesky');
  assert.equal(post.textPosition, 'above');
  assert.equal(post.segments.length, 1);
  assert.deepEqual(post.segments[0]?.media, []);
  assert.ok(post.segments[0]?.text);
  assert.match(post.author.handle, /^@/);
});

test('an image post keeps every image, in order, with alt text', () => {
  const media = single('images').segments[0]?.media ?? [];
  assert.ok(media.length > 1, 'expected a multi-image post');
  assert.ok(media.every((m) => m.kind === 'image'));
  assert.ok(media.every((m) => m.url.startsWith('https://')));
  assert.ok(media.some((m) => m.kind === 'image' && m.alt));
});

test('a video post is a direct HLS playlist with a poster', () => {
  const item = single('video').segments[0]?.media[0];
  assert.equal(item?.kind, 'video');
  assert.ok(item?.kind === 'video' && item.hls);
  // Proxying HLS would mean rewriting the manifest, so it is linked direct.
  assert.ok(item?.direct);
  assert.ok(item?.kind === 'video' && item.poster);
});

test('a quote post with media reaches through the nested embed', () => {
  const media = mediaFromEmbed({
    $type: 'app.bsky.embed.recordWithMedia#view',
    media: { $type: 'app.bsky.embed.images#view', images: [{ fullsize: 'https://example/i.jpg' }] },
  });
  assert.deepEqual(media, [{ kind: 'image', url: 'https://example/i.jpg' }]);
});

test('a quote post shows the media of the post it quotes', () => {
  const media = mediaFromEmbed({
    $type: 'app.bsky.embed.record#view',
    record: {
      embeds: [{ $type: 'app.bsky.embed.images#view', images: [{ fullsize: 'https://cdn/q.jpg' }] }],
    },
  });
  assert.deepEqual(media, [{ kind: 'image', url: 'https://cdn/q.jpg' }]);
});

// The chain fixture is a real thread. Other people's replies were trimmed to
// two per level for size, but deliberately kept: the whole point is that they
// are there in the payload and must not appear in the output.
test("the author's own chain is followed, in order, and marked", () => {
  const post = toPost(fixture('bluesky/thread-chain.json'), URL_);

  assert.equal(post.segments.length, 6, 'anchor plus five follow-ups');
  assert.equal(post.segments[0]?.isAnchor, true, 'the linked post leads the chain here');
  assert.equal(post.segments.filter((s) => s.isAnchor).length, 1);

  const times = post.segments.map((s) => s.postedAt ?? '');
  assert.deepEqual([...times].sort(), times, 'segments must be in the order written');

  assert.match(post.segments[0]?.text ?? '', /redesigning the notifications tab/);
  assert.match(post.segments[5]?.text ?? '', /Let us know what works/);
});

test("other people's replies never appear in the thread", () => {
  const chain = selfThread(fixture('bluesky/thread-chain.json'));
  const texts = chain.map((s) => s.text ?? '').join('\n');

  // All present in the fixture as replies to the same posts.
  for (const stranger of ['Really? One of the most visited?', 'Show us notifications from muted', 'WHY ARE YOU NOT USING DARK MODE']) {
    assert.ok(!texts.includes(stranger), `a reply leaked into the thread: ${stranger}`);
  }
});

test('a post with no thread around it is a single segment', () => {
  const chain = selfThread({
    post: {
      uri: 'at://x/app.bsky.feed.post/1',
      author: { handle: 'someone.bsky.social' },
      record: { text: 'alone' },
    },
    replies: [
      { post: { uri: 'at://y/1', author: { handle: 'other.bsky.social' }, record: { text: 'hi' } } },
    ],
  });
  assert.equal(chain.length, 1);
  assert.equal(chain[0]?.isAnchor, true);
});

test('a linked post mid-thread keeps the posts that came before it', () => {
  const chain = selfThread({
    post: { uri: 'at://a/2', author: { handle: 'me.bsky.social' }, record: { text: 'second' } },
    parent: {
      post: { uri: 'at://a/1', author: { handle: 'me.bsky.social' }, record: { text: 'first' } },
    },
    replies: [
      { post: { uri: 'at://a/3', author: { handle: 'me.bsky.social' }, record: { text: 'third' } } },
      { post: { uri: 'at://b/1', author: { handle: 'other.bsky.social' }, record: { text: 'nope' } } },
    ],
  });
  assert.deepEqual(chain.map((s) => s.text), ['first', 'second', 'third']);
  assert.deepEqual(chain.map((s) => s.isAnchor), [undefined, true, undefined]);
});

test('the walk up stops at the first post by someone else', () => {
  const chain = selfThread({
    post: { uri: 'at://a/2', author: { handle: 'me.bsky.social' }, record: { text: 'mine' } },
    parent: {
      post: { uri: 'at://b/1', author: { handle: 'other.bsky.social' }, record: { text: 'theirs' } },
      parent: {
        post: { uri: 'at://a/0', author: { handle: 'me.bsky.social' }, record: { text: 'older' } },
      },
    },
  });
  assert.deepEqual(chain.map((s) => s.text), ['mine']);
});