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'use strict';
const common = require('../common');
const assert = require('assert');
const {
BroadcastChannel,
} = require('worker_threads');
{
const c1 = new BroadcastChannel('eventType').unref();
const c2 = new BroadcastChannel('eventType');
c2.onmessage = common.mustCall((e) => {
assert(e instanceof MessageEvent);
assert.strictEqual(e.target, c2);
assert.strictEqual(e.type, 'message');
assert.strictEqual(e.data, 'hello world');
c2.close();
});
c1.postMessage('hello world');
}
{
// Messages are delivered in port creation order.
// TODO(@jasnell): The ordering here is different than
// what the browsers would implement due to the different
// dispatching algorithm under the covers. What's not
// immediately clear is whether the ordering is spec
// mandated. In this test, c1 should receive events
// first, then c2, then c3. In the Node.js dispatching
// algorithm this means the ordering is:
// from c3 (c1 from c3)
// done (c1 from c2)
// from c1 (c2 from c1)
// from c3 (c2 from c3)
// from c1 (c3 from c1)
// done (c3 from c2)
//
// Whereas in the browser-ordering (as illustrated in the
// Web Platform Tests) it would be:
// from c1 (c2 from c1)
// from c1 (c3 from c1)
// from c3 (c1 from c3)
// from c3 (c2 from c3)
// done (c1 from c2)
// done (c3 from c2)
const c1 = new BroadcastChannel('order');
const c2 = new BroadcastChannel('order');
const c3 = new BroadcastChannel('order');
const events = [];
let doneCount = 0;
const handler = common.mustCall((e) => {
events.push(e);
if (e.data === 'done') {
doneCount++;
if (doneCount === 2) {
assert.strictEqual(events.length, 6);
assert.strictEqual(events[0].data, 'from c3');
assert.strictEqual(events[1].data, 'done');
assert.strictEqual(events[2].data, 'from c1');
assert.strictEqual(events[3].data, 'from c3');
assert.strictEqual(events[4].data, 'from c1');
assert.strictEqual(events[5].data, 'done');
c1.close();
c2.close();
c3.close();
}
}
}, 6);
c1.onmessage = handler;
c2.onmessage = handler;
c3.onmessage = handler;
c1.postMessage('from c1');
c3.postMessage('from c3');
c2.postMessage('done');
}
{
// Messages aren't delivered to a closed port
const c1 = new BroadcastChannel('closed1').unref();
const c2 = new BroadcastChannel('closed1');
const c3 = new BroadcastChannel('closed1');
c2.onmessage = common.mustNotCall();
c2.close();
c3.onmessage = common.mustCall(() => c3.close());
c1.postMessage('test');
}
{
// Messages aren't delivered to a port closed after calling postMessage.
const c1 = new BroadcastChannel('closed2').unref();
const c2 = new BroadcastChannel('closed2');
const c3 = new BroadcastChannel('closed2');
c2.onmessage = common.mustNotCall();
c3.onmessage = common.mustCall(() => c3.close());
c1.postMessage('test');
c2.close();
}
{
// Closing and creating channels during message delivery works correctly
const c1 = new BroadcastChannel('create-in-onmessage').unref();
const c2 = new BroadcastChannel('create-in-onmessage');
c2.onmessage = common.mustCall((e) => {
assert.strictEqual(e.data, 'first');
c2.close();
const c3 = new BroadcastChannel('create-in-onmessage');
c3.onmessage = common.mustCall((event) => {
assert.strictEqual(event.data, 'done');
c3.close();
});
c1.postMessage('done');
});
c1.postMessage('first');
c2.postMessage('second');
}
{
// Closing a channel in onmessage prevents already queued tasks
// from firing onmessage events
const c1 = new BroadcastChannel('close-in-onmessage2').unref();
const c2 = new BroadcastChannel('close-in-onmessage2');
const c3 = new BroadcastChannel('close-in-onmessage2');
const events = [];
c1.onmessage = (e) => events.push('c1: ' + e.data);
c2.onmessage = (e) => events.push('c2: ' + e.data);
c3.onmessage = (e) => events.push('c3: ' + e.data);
// c2 closes itself when it receives the first message
c2.addEventListener('message', common.mustCall(() => c2.close()));
c3.addEventListener('message', common.mustCall((e) => {
if (e.data === 'done') {
assert.deepStrictEqual(events, [
'c2: first',
'c3: first',
'c3: done']);
c3.close();
}
}, 2));
c1.postMessage('first');
c1.postMessage('done');
}
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