outlier-saver-extension/test/export.test.js

import { test } from 'node:test';
import assert from 'node:assert/strict';
import { COLUMNS, toCsv, toJson } from '../src/lib/export.js';

const record = (over = {}) => ({
  videoId: 'dQw4w9WgXcQ',
  title: 'Hello',
  url: 'https://www.youtube.com/watch?v=dQw4w9WgXcQ',
  thumbnailUrl: 'https://i.ytimg.com/vi/dQw4w9WgXcQ/mqdefault.jpg',
  channelTitle: 'Chan',
  channelUrl: 'https://www.youtube.com/@chan',
  subscribers: 1000,
  views: 50000,
  outlierScore: 50,
  isShort: false,
  foundOn: 'home',
  firstSeenAt: '2026-10-25T10:00:00.000Z',
  updatedAt: '2026-10-25T10:00:00.000Z',
  ...over,
});

test('COLUMNS lists the stored fields in order', () => {
  assert.deepEqual(COLUMNS, [
    'videoId',
    'title',
    'url',
    'thumbnailUrl',
    'channelTitle',
    'channelUrl',
    'subscribers',
    'views',
    'outlierScore',
    'isShort',
    'foundOn',
    'firstSeenAt',
    'updatedAt',
  ]);
});

test('toCsv writes a header and one row per record', () => {
  assert.equal(
    toCsv([record()]),
    COLUMNS.join(',') +
      '\r\n' +
      'dQw4w9WgXcQ,Hello,https://www.youtube.com/watch?v=dQw4w9WgXcQ,' +
      'https://i.ytimg.com/vi/dQw4w9WgXcQ/mqdefault.jpg,Chan,https://www.youtube.com/@chan,' +
      '1000,50000,50,false,home,2026-10-25T10:00:00.000Z,2026-10-25T10:00:00.000Z\r\n',
  );
});

test('toCsv quotes commas, quotes and newlines', () => {
  const csv = toCsv([record({ title: 'He said "hi", then\nleft' })]);
  assert.ok(csv.includes('"He said ""hi"", then\nleft"'));
});

test('toCsv writes null and undefined as empty cells and keeps booleans readable', () => {
  const csv = toCsv([record({ subscribers: null, isShort: true, channelUrl: undefined })]);
  const row = csv.split('\r\n')[1];
  assert.ok(row.includes(',true,'));
  assert.ok(row.includes('Chan,,,50000')); // channelUrl and subscribers empty
});

test('toCsv of no records is just the header', () => {
  assert.equal(toCsv([]), COLUMNS.join(',') + '\r\n');
});

test('toJson pretty-prints and round-trips', () => {
  const records = [record(), record({ videoId: 'abcdefghijk' })];
  const text = toJson(records);
  assert.ok(text.includes('\n  '));
  assert.deepEqual(JSON.parse(text), records);
});