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5e095f699e
When a possible listener leak is detected, a warning is emitted. This commit updates an existing test to verify that the warning is only emitted once. PR-URL: https://github.com/nodejs/node/pull/12502 Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
24 lines
815 B
JavaScript
24 lines
815 B
JavaScript
// Flags: --no-warnings
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// The flag suppresses stderr output but the warning event will still emit
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'use strict';
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const common = require('../common');
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const events = require('events');
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const assert = require('assert');
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const e = new events.EventEmitter();
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e.setMaxListeners(1);
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process.on('warning', common.mustCall((warning) => {
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assert.ok(warning instanceof Error);
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assert.strictEqual(warning.name, 'MaxListenersExceededWarning');
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assert.strictEqual(warning.emitter, e);
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assert.strictEqual(warning.count, 2);
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assert.strictEqual(warning.type, 'event-type');
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assert.ok(warning.message.includes('2 event-type listeners added.'));
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}));
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e.on('event-type', common.noop);
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e.on('event-type', common.noop); // Trigger warning.
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e.on('event-type', common.noop); // Verify that warning is emitted only once.
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