Function testWritev

test/parallel/test-stream-iter-writable-interop.js:286–311

()

// =============================================================================

async function testWritev() {
  const chunks = [];
  const writable = new Writable({
    highWaterMark: 1024,
    write(chunk, encoding, cb) {
      chunks.push(Buffer.from(chunk));
      cb();
    },
    writev(entries, cb) {
      for (const { chunk } of entries) {
        chunks.push(Buffer.from(chunk));
      }
      cb();
    },
  });

  const writer = fromWritable(writable, { backpressure: 'block' });
  await writer.writev([
    new TextEncoder().encode('hello'),
    new TextEncoder().encode(' '),
    new TextEncoder().encode('world'),
  ]);
  await writer.end();

  assert.strictEqual(Buffer.concat(chunks).toString(), 'hello world');
}

// =============================================================================
// writeSync / writevSync always return false