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test: refactor test-stream2-unpipe-drain

- Change var to const
- Remove dependency crypto

PR-URL: #10033
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
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storytimesolutions authored and italoacasas committed Dec 1, 2016
1 parent 9946519 commit 627fa9309531fa36d99214b872261ab4f8145376
Showing with 10 additions and 16 deletions.
  1. +10 −16 test/parallel/test-stream2-unpipe-drain.js
@@ -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);
});

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