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'use strict'; const common = require('../common'); const assert = require('assert'); const { MessageChannel } = require('worker_threads'); { const { port1: basePort1, port2: basePort2 } = new MessageChannel(); const { port1: transferredPort1, port2: transferredPort2 } = new MessageChannel(); basePort1.postMessage({ transferredPort1 }, [ transferredPort1 ]); basePort2.on('message', common.mustCall(({ transferredPort1 }) => { transferredPort1.postMessage('foobar'); transferredPort2.on('message', common.mustCall((msg) => { assert.strictEqual(msg, 'foobar'); transferredPort1.close(common.mustCall()); basePort1.close(common.mustCall()); })); })); }