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Automation Advisor
K6
eventloop
promiseRejectionTracker

How to use promiseRejectionTracker method of eventloop Package

Best K6 code snippet using eventloop.promiseRejectionTracker

eventloop.go

Source:eventloop.go

...37		wakeupCh:                 make(chan struct{}, 1),38		pendingPromiseRejections: make(map[*goja.Promise]struct{}),39		vu:                       vu,40	}41	vu.Runtime().SetPromiseRejectionTracker(e.promiseRejectionTracker)42	return e43}44func (e *EventLoop) wakeup() {45	select {46	case e.wakeupCh <- struct{}{}:47	default:48	}49}50// RegisterCallback register that a callback will be invoked on the loop, preventing it from returning/finishing.51// The returned function, upon invocation, will queue its argument and wakeup the loop if needed.52// If the eventLoop has since stopped, it will not be executed.53// This function *must* be called from within running on the event loop, but its result can be called from anywhere.54func (e *EventLoop) RegisterCallback() func(func() error) {55	e.lock.Lock()56	e.registeredCallbacks++57	e.lock.Unlock()58	return func(f func() error) {59		e.lock.Lock()60		e.queue = append(e.queue, f)61		e.registeredCallbacks--62		e.lock.Unlock()63		e.wakeup()64	}65}66func (e *EventLoop) promiseRejectionTracker(p *goja.Promise, op goja.PromiseRejectionOperation) {67	// No locking necessary here as the goja runtime will call this synchronously68	// Read Notes on https://tc39.es/ecma262/#sec-host-promise-rejection-tracker69	if op == goja.PromiseRejectionReject {70		e.pendingPromiseRejections[p] = struct{}{}71	} else { // goja.PromiseRejectionHandle so a promise that was previously rejected without handler now got one72		delete(e.pendingPromiseRejections, p)73	}74}75func (e *EventLoop) popAll() (queue []func() error, awaiting bool) {76	e.lock.Lock()77	queue = e.queue78	e.queue = make([]func() error, 0, len(queue))79	awaiting = e.registeredCallbacks != 080	e.lock.Unlock()...

promiseRejectionTracker

Using AI Code Generation

1import (2func main() {3	c := make(chan struct{}, 0)4	js.Global().Set("promiseRejectionTracker", js.NewCallback(func(args []js.Value) {5		fmt.Println("Rejection happened")6	}))7}8        var promise = new Promise((resolve, reject) => {9            reject("Promise rejected")10        })

promiseRejectionTracker

Using AI Code Generation

1import (2func main() {3	promiseRejectionTracker := js.Global().Get("EventLoop").Get("promiseRejectionTracker")4	callback := js.FuncOf(func(this js.Value, args []js.Value) interface{} {5		fmt.Println("Promise object: ", promise)6		fmt.Println("Reason object: ", reason)7		fmt.Println("Promise state: ", state)8	})9	promiseRejectionTracker.Invoke(callback)10}11Promise object:  Promise {[[PromiseStatus]]: "rejected", [[PromiseValue]]: "Error: Something went wrong"}

promiseRejectionTracker

Using AI Code Generation

1eventloop.promiseRejectionTracker()2{3}4eventloop.promiseRejectionTracker()5{6}7eventloop.promiseRejectionTracker()8{9}10eventloop.promiseRejectionTracker()11{12}13eventloop.promiseRejectionTracker()14{15}16eventloop.promiseRejectionTracker()17{18}19eventloop.promiseRejectionTracker()20{21}22eventloop.promiseRejectionTracker()23{24}25eventloop.promiseRejectionTracker()26{27}28eventloop.promiseRejectionTracker()29{30}31eventloop.promiseRejectionTracker()32{33}34eventloop.promiseRejectionTracker()35{36}37eventloop.promiseRejectionTracker()38{39}

promiseRejectionTracker

Using AI Code Generation

1const {EventLoop} = require('eventloop');2const eventloop = new EventLoop();3const promise = new Promise((resolve, reject) => {4  reject('error');5});6eventloop.promiseRejectionTracker(promise, 'reject');7eventloop.on('promiseRejectionTracker', (promise, status) => {8  console.log(promise, status);9});10const {EventLoop} = require('eventloop');11const eventloop = new EventLoop();12const promise = new Promise((resolve, reject) => {13  reject('error');14});15eventloop.promiseRejectionTracker(promise, 'reject');16eventloop.on('promiseRejectionTracker', (promise, status) => {17  console.log(promise, status);18});19const {EventLoop} = require('eventloop');20const eventloop = new EventLoop();21const promise = new Promise((resolve, reject) => {22  reject('error');23});24eventloop.promiseRejectionTracker(promise, 'reject');25eventloop.on('promiseRejectionTracker', (promise, status) => {26  console.log(promise, status);27});28const {EventLoop} = require('eventloop');29const eventloop = new EventLoop();30const promise = new Promise((resolve, reject) => {31  reject('error');32});33eventloop.promiseRejectionTracker(promise, 'reject');34eventloop.on('promiseRejectionTracker', (promise, status) => {35  console.log(promise, status);36});37const {EventLoop} = require('eventloop');38const eventloop = new EventLoop();39const promise = new Promise((resolve, reject) => {40  reject('error');41});42eventloop.promiseRejectionTracker(promise, 'reject');43eventloop.on('promiseRejectionTracker', (promise, status) => {44  console.log(promise, status);45});46const {EventLoop} = require('event

promiseRejectionTracker

Using AI Code Generation

1import (2func main() {3	loop := runtime.EventLoop()4	loop.On("promiseRejectionTracker", func(event *runtime.Event) {5		fmt.Println("PromiseRejectionTracker event")6		fmt.Println(event.Data["reason"])7	})8	promise := runtime.NewPromise()9	promise.Reject("An error occurred")10	loop.Run()11}

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