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test(function() {
assert_throws_js(
TypeError,
() => BroadcastChannel(""),
"Calling BroadcastChannel constructor without 'new' must throw"
);
}, "BroadcastChannel constructor called as normal function");
async_test(t => {
let c1 = new BroadcastChannel('eventType');
let c2 = new BroadcastChannel('eventType');
c2.onmessage = t.step_func(e => {
assert_true(e instanceof MessageEvent);
assert_equals(e.target, c2);
assert_equals(e.type, 'message');
assert_equals(e.origin, location.origin, 'origin');
assert_equals(e.data, 'hello world');
assert_equals(e.source, null, 'source');
t.done();
});
c1.postMessage('hello world');
}, 'postMessage results in correct event');
async_test(t => {
let c1 = new BroadcastChannel('order');
let c2 = new BroadcastChannel('order');
let c3 = new BroadcastChannel('order');
let events = [];
let doneCount = 0;
let handler = t.step_func(e => {
events.push(e);
if (e.data == 'done') {
doneCount++;
if (doneCount == 2) {
assert_equals(events.length, 6);
assert_equals(events[0].target, c2, 'target for event 0');
assert_equals(events[0].data, 'from c1');
assert_equals(events[1].target, c3, 'target for event 1');
assert_equals(events[1].data, 'from c1');
assert_equals(events[2].target, c1, 'target for event 2');
assert_equals(events[2].data, 'from c3');
assert_equals(events[3].target, c2, 'target for event 3');
assert_equals(events[3].data, 'from c3');
assert_equals(events[4].target, c1, 'target for event 4');
assert_equals(events[4].data, 'done');
assert_equals(events[5].target, c3, 'target for event 5');
assert_equals(events[5].data, 'done');
t.done();
}
}
});
c1.onmessage = handler;
c2.onmessage = handler;
c3.onmessage = handler;
c1.postMessage('from c1');
c3.postMessage('from c3');
c2.postMessage('done');
}, 'messages are delivered in port creation order');
async_test(t => {
let c1 = new BroadcastChannel('closed');
let c2 = new BroadcastChannel('closed');
let c3 = new BroadcastChannel('closed');
c2.onmessage = t.unreached_func();
c2.close();
c3.onmessage = t.step_func(() => t.done());
c1.postMessage('test');
}, 'messages aren\'t delivered to a closed port');
async_test(t => {
let c1 = new BroadcastChannel('closed');
let c2 = new BroadcastChannel('closed');
let c3 = new BroadcastChannel('closed');
c2.onmessage = t.unreached_func();
c3.onmessage = t.step_func(() => t.done());
c1.postMessage('test');
c2.close();
}, 'messages aren\'t delivered to a port closed after calling postMessage.');
async_test(t => {
let c1 = new BroadcastChannel('create-in-onmessage');
let c2 = new BroadcastChannel('create-in-onmessage');
c2.onmessage = t.step_func(e => {
assert_equals(e.data, 'first');
c2.close();
let c3 = new BroadcastChannel('create-in-onmessage');
c3.onmessage = t.step_func(event => {
assert_equals(event.data, 'done');
t.done();
});
c1.postMessage('done');
});
c1.postMessage('first');
c2.postMessage('second');
}, 'closing and creating channels during message delivery works correctly');
async_test(t => {
let c1 = new BroadcastChannel('close-in-onmessage');
let c2 = new BroadcastChannel('close-in-onmessage');
let c3 = new BroadcastChannel('close-in-onmessage');
let 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', e => {
c2.close();
});
c3.addEventListener('message', t.step_func(e => {
if (e.data == 'done') {
assert_array_equals(events, [
'c2: first',
'c3: first',
'c3: done']);
t.done();
}
}));
c1.postMessage('first');
c1.postMessage('done');
}, 'Closing a channel in onmessage prevents already queued tasks from firing onmessage events');
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