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'use strict'; const common = require('../common'); const { Worker } = require('worker_threads'); const { createHook } = require('async_hooks'); const { strictEqual } = require('assert'); let handle; createHook({ init(asyncId, type, triggerAsyncId, resource) { if (type === 'WORKER') { handle = resource; this.disable(); } } }).enable(); const w = new Worker('', { eval: true }); strictEqual(handle.hasRef(), true); w.unref(); strictEqual(handle.hasRef(), false); w.ref(); strictEqual(handle.hasRef(), true); w.on('exit', common.mustCall((exitCode) => { strictEqual(exitCode, 0); strictEqual(handle.hasRef(), true); setTimeout(common.mustCall(() => { strictEqual(handle.hasRef(), undefined); }), 0); }));