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'use strict';
const common = require('../common');
const EventEmitter = require('events');
const assert = require('assert');
const ee = new EventEmitter();
const foo = Symbol('foo');
const listener = common.mustCall();
ee.on(foo, listener);
assert.deepStrictEqual(ee.listeners(foo), [listener]);
ee.emit(foo);
ee.removeAllListeners();
assert.deepStrictEqual(ee.listeners(foo), []);
ee.on(foo, listener);
assert.deepStrictEqual(ee.listeners(foo), [listener]);
ee.removeListener(foo, listener);
assert.deepStrictEqual(ee.listeners(foo), []);
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