node/test/parallel/test-promise-hook-on-before.js

28 lines
640 B
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const { promiseHooks } = require('v8');
assert.throws(() => {
promiseHooks.onBefore(async function() { });
}, /The "beforeHook" argument must be of type function/);
assert.throws(() => {
promiseHooks.onBefore(async function*() { });
}, /The "beforeHook" argument must be of type function/);
let seen;
const stop = promiseHooks.onBefore(common.mustCall((promise) => {
seen = promise;
}, 1));
const promise = Promise.resolve().then(() => {
assert.strictEqual(seen, promise);
stop();
});
promise.then();
assert.strictEqual(seen, undefined);