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MSE-in-Workers: Relaunch with flag guards and handle visibility restricted #36117

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Oct 1, 2022
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MSE-in-Workers: Relaunch with flag guards and handle visibility restricted #36117

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14 changes: 8 additions & 6 deletions media-source/dedicated-worker/mediasource-worker-handle.html
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Original file line number Diff line number Diff line change
Expand Up @@ -34,15 +34,17 @@
}, "Test main context receipt of postMessage'd MediaSourceHandle from DedicatedWorker MediaSource");

test(t => {
assert_true(window.hasOwnProperty("MediaSourceHandle"), "window must have MediaSourceHandle visibility");
assert_true(window.hasOwnProperty("MediaSourceHandle"), "window must have MediaSourceHandle");
}, "Test main-thread has MediaSourceHandle defined");

test(t => {
// Note, MSE spec may eventually describe how a main-thread MediaSource can
// attach to an HTMLMediaElement using a MediaSourceHandle. For now, we
// ensure that the implementation of this is not available.
assert_throws_dom('NotSupportedError', function() {
let h = new MediaSource().handle;
}, 'main thread MediaSource instance cannot (yet) create a usable MediaSourceHandle');
}, "Test main-thread-owned MediaSource instance cannot create a MediaSourceHandle");
// ensure that the implementation of this is not available per current spec.
assert_false(
"handle" in MediaSource.prototype,
"window MediaSource must not have handle in prototype");
}, "Test main-thread MediaSource does not have handle getter");

if (MediaSource.hasOwnProperty("canConstructInDedicatedWorker") && MediaSource.canConstructInDedicatedWorker === true) {
// If implementation claims support for MSE-in-Workers, then fetch and run
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