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denoland-deno/tests/specs/test/worker_large_output/main.js

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// Regression test for workers that post large amounts of output as a test is ending. This
// test should not deadlock, though the output is undefined.
Deno.test(async function workerOutput() {
console.log("Booting worker");
const code =
"self.postMessage(0); console.log(`hello from worker\n`.repeat(60000));";
const worker = new Worker(URL.createObjectURL(new Blob([code])), {
type: "module",
});
await new Promise((r) =>
worker.addEventListener("message", () => {
r();
})
);
});