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LibWeb: Capture incoming reason argument

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Capture the incoming reason argument to
transform_stream_default_source_cancel_algorithm() on the
on_fulfilled_callback() of WebIDL::react_to_promise() on step 7.
This commit is contained in:
Kenneth Myhra 2024-08-20 20:02:35 +02:00 • committed by Tim Ledbetter
commit 26fe7a628c
Notes: github-actions[bot] 2024-08-21 10:22:54 +00:00
3 changed files with 26 additions and 1 deletions
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3
Tests/LibWeb/Text/expected/Streams/TransformStream-readable-cancel.txt Normal file
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@ -0,0 +1,3 @@
catch Error: error1
catch Error: error1
catch Error: error1

22
Tests/LibWeb/Text/input/Streams/TransformStream-readable-cancel.html Normal file
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@ -0,0 +1,22 @@
<script src="../include.js"></script>
<script>
test(() => {
const ts = new TransformStream();
ts.readable.cancel(new Error("error1"));
ts.writable.getWriter().closed.catch(e => {
println(`catch ${e}`);
});
const tsWithBackpressure = new TransformStream({}, undefined, { highWaterMark: 0 });
tsWithBackpressure.readable.cancel(new Error("error1"))
tsWithBackpressure.writable.getWriter().closed.catch(e => {
println(`catch ${e}`)
})
const tsWithoutBackpressure = new TransformStream({}, undefined, { highWaterMark: 1 });
tsWithoutBackpressure.readable.cancel(new Error("error1"))
tsWithoutBackpressure.writable.getWriter().closed.catch(e => {
println(`catch ${e}`)
})
});
</script>

2
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
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@ -5168,7 +5168,7 @@ JS::NonnullGCPtr<WebIDL::Promise> transform_stream_default_source_cancel_algorit
WebIDL::react_to_promise(
*cancel_promise,
// 1. If cancelPromise was fulfilled, then:
JS::create_heap_function(realm.heap(), [&realm, writable, controller, &stream](JS::Value reason) -> WebIDL::ExceptionOr<JS::Value> {
JS::create_heap_function(realm.heap(), [&realm, writable, controller, &stream, reason](JS::Value) -> WebIDL::ExceptionOr<JS::Value> {
// 1. If writable.[[state]] is "errored", reject controller.[[finishPromise]] with writable.[[storedError]].
if (writable->state() == WritableStream::State::Errored) {
WebIDL::reject_promise(realm, *controller->finish_promise(), writable->stored_error());