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var common = require('../common');
var assert = require('assert');
var events = require('events');
var e = new events.EventEmitter();
var times_hello_emited = 0;
e.once('hello', function(a, b) {
times_hello_emited++;
});
e.emit('hello', 'a', 'b');
e.emit('hello', 'a', 'b');
e.emit('hello', 'a', 'b');
e.emit('hello', 'a', 'b');
process.addListener('exit', function() {
assert.equal(1, times_hello_emited);
});
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