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// Flags: --experimental-worker
'use strict';
const common = require('../common');
const assert = require('assert');
const { Worker, parentPort } = require('worker_threads');
// Do not use isMainThread so that this test itself can be run inside a Worker.
if (!process.env.HAS_STARTED_WORKER) {
process.env.HAS_STARTED_WORKER = 1;
const w = new Worker(__filename);
w.on('message', common.mustCall((message) => {
assert.strictEqual(message, 4);
w.terminate();
}));
w.postMessage(2);
} else {
parentPort.onmessage = common.mustCall((message) => {
parentPort.postMessage(message * 2);
});
}
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