test-async-hooks-promise.js

'use strict';
const common = require('../common');
const assert = require('assert');
const async_hooks = require('async_hooks');

if (!common.isMainThread)
  common.skip('Worker bootstrapping works differently -> different async IDs');

const initCalls = [];
const resolveCalls = [];

async_hooks.createHook({
  init: common.mustCall((id, type, triggerId, resource) => {
    assert.strictEqual(type, 'PROMISE');
    initCalls.push({ id, triggerId, resource });
  }, 2),
  promiseResolve: common.mustCall((id) => {
    assert.strictEqual(initCalls[resolveCalls.length].id, id);
    resolveCalls.push(id);
  }, 2)
}).enable();

const a = Promise.resolve(42);
a.then(common.mustCall());

assert.strictEqual(initCalls[0].triggerId, 1);
assert.strictEqual(initCalls[0].resource.isChainedPromise, false);
assert.strictEqual(initCalls[1].triggerId, initCalls[0].id);
assert.strictEqual(initCalls[1].resource.isChainedPromise, true);