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test: increase coverage for lib/events.js #9865

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test: increase coverage for lib/events.js #9865

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6d63d0d
test: increase coverage for lib/events.js
captainsafia Dec 1, 2016
c5fd061
test: add new test case for undefined _events
captainsafia Dec 1, 2016
f6d8b1b
test: move TestStream inheritance modification
captainsafia Dec 2, 2016
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14 changes: 14 additions & 0 deletions test/parallel/test-event-emitter-listeners.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,12 @@
require('../common');
const assert = require('assert');
const events = require('events');
const util = require('util');

function listener() {}
function listener2() {}
class TestStream { constructor() { } }
util.inherits(TestStream, events.EventEmitter);

{
const ee = new events.EventEmitter();
Expand Down Expand Up @@ -49,3 +52,14 @@ function listener2() {}
ee.once('foo', listener2);
assert.deepStrictEqual(ee.listeners('foo'), [listener, listener2]);
}

{
const ee = new events.EventEmitter();
ee._events = undefined;
assert.deepStrictEqual(ee.listeners('foo'), []);
}

{
const s = new TestStream();
assert.deepStrictEqual(s.listeners('foo'), []);
}