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190 lines
5.6 KiB
JavaScript
190 lines
5.6 KiB
JavaScript
// deno-fmt-ignore-file
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// deno-lint-ignore-file
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.
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// Taken from Node 18.12.1
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// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
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// Flags: --expose-internals --no-warnings
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'use strict';
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const common = require('../common');
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const { NodeEventTarget } = require('internal/event_target');
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const {
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deepStrictEqual,
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ok,
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strictEqual,
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throws,
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} = require('assert');
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const { on } = require('events');
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{
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const eventTarget = new NodeEventTarget();
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strictEqual(eventTarget.listenerCount('foo'), 0);
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deepStrictEqual(eventTarget.eventNames(), []);
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const ev1 = common.mustCall(function(event) {
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strictEqual(event.type, 'foo');
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strictEqual(this, eventTarget);
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}, 2);
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const ev2 = {
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handleEvent: common.mustCall(function(event) {
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strictEqual(event.type, 'foo');
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strictEqual(this, ev2);
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})
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};
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eventTarget.addEventListener('foo', ev1);
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eventTarget.addEventListener('foo', ev2, { once: true });
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strictEqual(eventTarget.listenerCount('foo'), 2);
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ok(eventTarget.dispatchEvent(new Event('foo')));
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strictEqual(eventTarget.listenerCount('foo'), 1);
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eventTarget.dispatchEvent(new Event('foo'));
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eventTarget.removeEventListener('foo', ev1);
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strictEqual(eventTarget.listenerCount('foo'), 0);
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eventTarget.dispatchEvent(new Event('foo'));
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}
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{
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const eventTarget = new NodeEventTarget();
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strictEqual(eventTarget.listenerCount('foo'), 0);
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deepStrictEqual(eventTarget.eventNames(), []);
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const ev1 = common.mustCall((event) => {
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strictEqual(event.type, 'foo');
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}, 2);
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const ev2 = {
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handleEvent: common.mustCall((event) => {
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strictEqual(event.type, 'foo');
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})
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};
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strictEqual(eventTarget.on('foo', ev1), eventTarget);
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strictEqual(eventTarget.once('foo', ev2, { once: true }), eventTarget);
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strictEqual(eventTarget.listenerCount('foo'), 2);
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eventTarget.dispatchEvent(new Event('foo'));
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strictEqual(eventTarget.listenerCount('foo'), 1);
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eventTarget.dispatchEvent(new Event('foo'));
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strictEqual(eventTarget.off('foo', ev1), eventTarget);
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strictEqual(eventTarget.listenerCount('foo'), 0);
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eventTarget.dispatchEvent(new Event('foo'));
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}
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{
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const eventTarget = new NodeEventTarget();
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strictEqual(eventTarget.listenerCount('foo'), 0);
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deepStrictEqual(eventTarget.eventNames(), []);
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const ev1 = common.mustCall((event) => {
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strictEqual(event.type, 'foo');
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}, 2);
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const ev2 = {
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handleEvent: common.mustCall((event) => {
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strictEqual(event.type, 'foo');
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})
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};
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eventTarget.addListener('foo', ev1);
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eventTarget.once('foo', ev2, { once: true });
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strictEqual(eventTarget.listenerCount('foo'), 2);
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eventTarget.dispatchEvent(new Event('foo'));
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strictEqual(eventTarget.listenerCount('foo'), 1);
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eventTarget.dispatchEvent(new Event('foo'));
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eventTarget.removeListener('foo', ev1);
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strictEqual(eventTarget.listenerCount('foo'), 0);
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eventTarget.dispatchEvent(new Event('foo'));
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}
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{
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const eventTarget = new NodeEventTarget();
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strictEqual(eventTarget.listenerCount('foo'), 0);
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deepStrictEqual(eventTarget.eventNames(), []);
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// Won't actually be called.
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const ev1 = () => {};
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// Won't actually be called.
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const ev2 = { handleEvent() {} };
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eventTarget.addListener('foo', ev1);
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eventTarget.addEventListener('foo', ev1);
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eventTarget.once('foo', ev2, { once: true });
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eventTarget.once('foo', ev2, { once: false });
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eventTarget.on('bar', ev1);
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strictEqual(eventTarget.listenerCount('foo'), 2);
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strictEqual(eventTarget.listenerCount('bar'), 1);
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deepStrictEqual(eventTarget.eventNames(), ['foo', 'bar']);
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strictEqual(eventTarget.removeAllListeners('foo'), eventTarget);
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strictEqual(eventTarget.listenerCount('foo'), 0);
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strictEqual(eventTarget.listenerCount('bar'), 1);
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deepStrictEqual(eventTarget.eventNames(), ['bar']);
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strictEqual(eventTarget.removeAllListeners(), eventTarget);
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strictEqual(eventTarget.listenerCount('foo'), 0);
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strictEqual(eventTarget.listenerCount('bar'), 0);
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deepStrictEqual(eventTarget.eventNames(), []);
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}
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{
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const target = new NodeEventTarget();
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process.on('warning', common.mustCall((warning) => {
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ok(warning instanceof Error);
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strictEqual(warning.name, 'MaxListenersExceededWarning');
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strictEqual(warning.target, target);
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strictEqual(warning.count, 2);
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strictEqual(warning.type, 'foo');
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ok(warning.message.includes(
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'2 foo listeners added to NodeEventTarget'));
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}));
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strictEqual(target.getMaxListeners(), NodeEventTarget.defaultMaxListeners);
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target.setMaxListeners(1);
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target.on('foo', () => {});
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target.on('foo', () => {});
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}
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{
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// Test NodeEventTarget emit
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const emitter = new NodeEventTarget();
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emitter.addEventListener('foo', common.mustCall((e) => {
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strictEqual(e.type, 'foo');
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strictEqual(e.detail, 'bar');
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ok(e instanceof Event);
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}), { once: true });
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emitter.once('foo', common.mustCall((e, droppedAdditionalArgument) => {
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strictEqual(e, 'bar');
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strictEqual(droppedAdditionalArgument, undefined);
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}));
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emitter.emit('foo', 'bar', 'baz');
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}
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{
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// Test NodeEventTarget emit unsupported usage
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const emitter = new NodeEventTarget();
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throws(() => {
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emitter.emit();
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}, /ERR_INVALID_ARG_TYPE/);
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}
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(async () => {
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// test NodeEventTarget async-iterability
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const emitter = new NodeEventTarget();
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const interval = setInterval(() => {
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emitter.dispatchEvent(new Event('foo'));
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}, 0);
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let count = 0;
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for await (const [ item ] of on(emitter, 'foo')) {
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count++;
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strictEqual(item.type, 'foo');
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if (count > 5) {
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break;
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}
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}
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clearInterval(interval);
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})().then(common.mustCall());
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