mozilla-central/testing/web-platform/tests/streams/piping/transform-streams.any.js (file symbol)

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Test Info:

// META: global=window,worker,shadowrealm
'use strict';
promise_test(() => {
const rs = new ReadableStream({
start(c) {
c.enqueue('a');
c.enqueue('b');
c.enqueue('c');
c.close();
}
});
const ts = new TransformStream();
const ws = new WritableStream();
return rs.pipeThrough(ts).pipeTo(ws).then(() => {
const writer = ws.getWriter();
return writer.closed;
});
}, 'Piping through an identity transform stream should close the destination when the source closes');