const test = require('node:test');
const assert = require('node:assert/strict');
const {readFile} = require('node:fs/promises');
const {join} = require('node:path');

test('Piper worker is built and started as an ES module', async () => {
  const [buildScript, runtime] = await Promise.all([
    readFile(join(__dirname, '..', 'scripts', 'build-piper.mjs'), 'utf8'),
    readFile(join(__dirname, '..', 'piper-runtime.js'), 'utf8'),
  ]);
  assert.match(buildScript, /outfile: join\(workerRoot, 'piper-worker\.js'\),\s*bundle: true,\s*format: 'esm'/);
  assert.match(runtime, /new Worker\(workerUrl, \{type: 'module'\}\)/);
});

test('Piper runtime discards a worker after a failed initialization for a clean retry', async () => {
  const runtime = await readFile(join(__dirname, '..', 'piper-runtime.js'), 'utf8');
  assert.match(runtime, /TtsSession keeps a singleton even when ONNX initialization fails/);
  assert.match(runtime, /worker\?\.terminate\(\);\s*worker = null;/);
});