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denoland-deno/tests/node_compat/test/parallel/test-event-emitter-error-monitor.js
Asher Gomez 29085895c9
chore: move tools/node_compat to tests/node_compat/runner (#23025)
The `tools/node_compat/node` submodule has been moved to
`tests/node_compat/runner/suite` and the remaining files within
`tools/node_compat` to `tests/node_compat/runner`.

Most of the changes are of the header within `tests/node_compat/test`
files. The `setup` and `test` tasks within `tests/node_comapt` execute
successfully.

Towards #22525
CC @mmastrac
2024-04-03 09:24:55 +11:00

39 lines
1 KiB
JavaScript

// deno-fmt-ignore-file
// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 18.12.1
// This file is automatically generated by `tests/node_compat/runner/setup.ts`. Do not modify this file manually.
'use strict';
const common = require('../common');
const assert = require('assert');
const EventEmitter = require('events');
const EE = new EventEmitter();
const theErr = new Error('MyError');
EE.on(
EventEmitter.errorMonitor,
common.mustCall(function onErrorMonitor(e) {
assert.strictEqual(e, theErr);
}, 3)
);
// Verify with no error listener
assert.throws(
() => EE.emit('error', theErr), theErr
);
// Verify with error listener
EE.once('error', common.mustCall((e) => assert.strictEqual(e, theErr)));
EE.emit('error', theErr);
// Verify it works with once
process.nextTick(() => EE.emit('error', theErr));
assert.rejects(EventEmitter.once(EE, 'notTriggered'), theErr);
// Only error events trigger error monitor
EE.on('aEvent', common.mustCall());
EE.emit('aEvent');