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40 lines
1 KiB
JavaScript
40 lines
1 KiB
JavaScript
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// 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 "node/_tools/setup.ts". Do not modify this file manually
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'use strict';
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const common = require('../common');
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const assert = require('assert');
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const EventEmitter = require('events');
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const EE = new EventEmitter();
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const theErr = new Error('MyError');
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EE.on(
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EventEmitter.errorMonitor,
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common.mustCall(function onErrorMonitor(e) {
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assert.strictEqual(e, theErr);
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}, 3)
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);
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// Verify with no error listener
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assert.throws(
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() => EE.emit('error', theErr), theErr
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);
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// Verify with error listener
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EE.once('error', common.mustCall((e) => assert.strictEqual(e, theErr)));
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EE.emit('error', theErr);
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// Verify it works with once
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process.nextTick(() => EE.emit('error', theErr));
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assert.rejects(EventEmitter.once(EE, 'notTriggered'), theErr);
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// Only error events trigger error monitor
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EE.on('aEvent', common.mustCall());
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EE.emit('aEvent');
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