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test: refactor test-stream2-unpipe-drain

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- Change var to const
- Remove dependency crypto

PR-URL: https://github.com/nodejs/node/pull/10033
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit is contained in:
Chris Story 2016-12-01 11:47:26 -06:00 committed by Italo A. Casas
parent 9946519fba
commit 627fa93095
1 changed files with 10 additions and 16 deletions
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26
test/parallel/test-stream2-unpipe-drain.js
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@ -1,15 +1,9 @@
'use strict';
var common = require('../common');
var assert = require('assert');
var stream = require('stream');
require('../common');
const assert = require('assert');
if (!common.hasCrypto) {
common.skip('missing crypto');
return;
}
var crypto = require('crypto');
var util = require('util');
const stream = require('stream');
const util = require('util');
function TestWriter() {
stream.Writable.call(this);
@ -21,7 +15,7 @@ TestWriter.prototype._write = function(buffer, encoding, callback) {
// super slow write stream (callback never called)
};
var dest = new TestWriter();
const dest = new TestWriter();
function TestReader(id) {
stream.Readable.call(this);
@ -31,11 +25,11 @@ util.inherits(TestReader, stream.Readable);
TestReader.prototype._read = function(size) {
this.reads += 1;
this.push(crypto.randomBytes(size));
this.push(Buffer.alloc(size));
};
var src1 = new TestReader();
var src2 = new TestReader();
const src1 = new TestReader();
const src2 = new TestReader();
src1.pipe(dest);
@ -55,6 +49,6 @@ src1.once('readable', function() {
process.on('exit', function() {
assert.equal(src1.reads, 2);
assert.equal(src2.reads, 2);
assert.strictEqual(src1.reads, 2);
assert.strictEqual(src2.reads, 2);
});