Function iterableThrow

test/parallel/test-events-on-async-iterator.js:190–226

()

}

async function iterableThrow() {
  const ee = new EventEmitter();
  const iterable = on(ee, 'foo');

  process.nextTick(() => {
    ee.emit('foo', 'bar');
    ee.emit('foo', 42); // lost in the queue
    iterable.throw(_err);
  });

  const _err = new Error('kaboom');
  let thrown = false;

  assert.throws(() => {
    // No argument
    iterable.throw();
  }, {
    message: 'The "EventEmitter.AsyncIterator" property must be' +
    ' an instance of Error. Received undefined',
    name: 'TypeError',
  });

  const expected = [['bar'], [42]];

  try {
    for await (const event of iterable) {
      assert.deepStrictEqual(event, expected.shift());
    }
  } catch (err) {
    thrown = true;
    assert.strictEqual(err, _err);
  }
  assert.strictEqual(thrown, true);
  assert.strictEqual(expected.length, 0);
  assert.strictEqual(ee.listenerCount('foo'), 0);
  assert.strictEqual(ee.listenerCount('error'), 0);
}

async function eventTarget() {
  const et = new EventTarget();