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<!DOCTYPE html>
<meta charset=utf-8>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(() => assert_throws_js(TypeError, () => new BroadcastChannel()),
'Should throw if no name is provided');
test(() => {
let c = new BroadcastChannel(null);
assert_equals(c.name, 'null');
}, 'Null name should not throw');
test(() => {
let c = new BroadcastChannel(undefined);
assert_equals(c.name, 'undefined');
}, 'Undefined name should not throw');
test(() => {
let c = new BroadcastChannel('fooBar');
assert_equals(c.name, 'fooBar');
}, 'Non-empty name should not throw');
test(() => {
let c = new BroadcastChannel(123);
assert_equals(c.name, '123');
}, 'Non-string name should not throw');
test(() => {
let c = new BroadcastChannel('');
assert_throws_js(TypeError, () => c.postMessage());
}, 'postMessage without parameters should throw');
test(() => {
let c = new BroadcastChannel('');
c.postMessage(null);
}, 'postMessage with null should not throw');
test(() => {
let c = new BroadcastChannel('');
c.close();
}, 'close should not throw');
test(() => {
let c = new BroadcastChannel('');
c.close();
c.close();
}, 'close should not throw when called multiple times');
test(() => {
let c = new BroadcastChannel('');
c.close();
assert_throws_dom('InvalidStateError', () => c.postMessage(''));
}, 'postMessage after close should throw');
test(() => {
let c = new BroadcastChannel('');
assert_not_equals(c.onmessage, undefined);
}, 'BroadcastChannel should have an onmessage event');
test(() => {
let c = new BroadcastChannel('');
assert_throws_dom('DataCloneError', () => c.postMessage(Symbol()));
}, 'postMessage should throw with uncloneable data');
test(() => {
let c = new BroadcastChannel('');
c.close();
assert_throws_dom('InvalidStateError', () => c.postMessage(Symbol()));
}, 'postMessage should throw InvalidStateError after close, even with uncloneable data');
</script>
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