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'use strict'; const common = require('../common'); const { MessageChannel } = require('worker_threads'); const { createHook } = require('async_hooks'); const { strictEqual } = require('assert'); const handles = []; createHook({ init(asyncId, type, triggerAsyncId, resource) { if (type === 'MESSAGEPORT') { handles.push(resource); } } }).enable(); const { port1, port2 } = new MessageChannel(); strictEqual(handles[0], port1); strictEqual(handles[1], port2); strictEqual(handles[0].hasRef(), false); strictEqual(handles[1].hasRef(), false); port1.unref(); strictEqual(handles[0].hasRef(), false); port1.ref(); strictEqual(handles[0].hasRef(), true); port1.unref(); strictEqual(handles[0].hasRef(), false); port1.on('message', () => {}); strictEqual(handles[0].hasRef(), true); port2.unref(); strictEqual(handles[1].hasRef(), false); port2.ref(); strictEqual(handles[1].hasRef(), true); port2.unref(); strictEqual(handles[1].hasRef(), false); port2.on('message', () => {}); strictEqual(handles[0].hasRef(), true); port1.on('close', common.mustCall(() => { strictEqual(handles[0].hasRef(), false); strictEqual(handles[1].hasRef(), false); })); port2.close(); strictEqual(handles[0].hasRef(), true); strictEqual(handles[1].hasRef(), true);