1'use strict';
2const common = require('../common');
3const assert = require('assert');
4const { MessageChannel } = require('worker_threads');
5
6// Test that passing duplicate transferrables in the transfer list throws
7// DataCloneError exceptions.
8
9{
10  const { port1, port2 } = new MessageChannel();
11  port2.once('message', common.mustNotCall());
12
13  const port3 = new MessageChannel().port1;
14  assert.throws(() => {
15    port1.postMessage(port3, [port3, port3]);
16  }, /^DataCloneError: Transfer list contains duplicate MessagePort$/);
17  port1.close();
18}
19
20{
21  const { port1, port2 } = new MessageChannel();
22  port2.once('message', common.mustNotCall());
23
24  const buf = new Uint8Array(10);
25  assert.throws(() => {
26    port1.postMessage(buf, [buf.buffer, buf.buffer]);
27  }, /^DataCloneError: Transfer list contains duplicate ArrayBuffer$/);
28  port1.close();
29}
30