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denoland-deno/cli/tests/node_compat/test/parallel/test-event-emitter-error-monitor.js
Yoshiya Hinosawa 6915a9b7a7
test(ext/node): more node compat tests (#17827)
This PR adds the remaining ~650 Node.js compat test cases from std/node.

Among these 650 cases, about 130 cases are now failing. These failing
cases are prefixed with `TODO:` in `tests/node_compat/config.json`.
These will be addressed in later PRs.
2023-02-20 16:35:04 +01:00

39 lines
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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 "node/_tools/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');