import test from 'node:test';
import assert from 'node:assert/strict';
import { resolveCurrentAudioStreamIndex } from './mpv';

test('resolveCurrentAudioStreamIndex returns selected ff-index when no current track id', () => {
  assert.equal(
    resolveCurrentAudioStreamIndex(
      [
        { type: 'audio', id: 1, selected: false, 'ff-index': 1 },
        { type: 'audio', id: 2, selected: true, 'ff-index': 3 },
      ],
      null,
    ),
    3,
  );
});

test('resolveCurrentAudioStreamIndex prefers matching current audio track id', () => {
  assert.equal(
    resolveCurrentAudioStreamIndex(
      [
        { type: 'audio', id: 1, selected: true, 'ff-index': 3 },
        { type: 'audio', id: 2, selected: false, 'ff-index': 6 },
      ],
      2,
    ),
    6,
  );
});

test('resolveCurrentAudioStreamIndex returns null when tracks are not an array', () => {
  assert.equal(resolveCurrentAudioStreamIndex(null, null), null);
});