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23 lines
806 B
23 lines
806 B
// 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', () => {});
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e.on('event-type', () => {}); // Trigger warning.
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e.on('event-type', () => {}); // Verify that warning is emitted only once.
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