test: fix issues for ESLint 2.7.0

PR-URL: https://github.com/nodejs/node/pull/6132
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: thefourtheye <thechargingvolcano@gmail.com>

test/parallel/test-async-wrap-disabled-propagate-parent.js

@@ -9,7 +9,6 @@ const providers = Object.keys(async_wrap.Providers);
 const uidSymbol = Symbol('uid');
 
 let cntr = 0;
-let server;
 let client;
 
 function init(uid, type, parentUid, parentHandle) {
@@ -34,7 +33,7 @@ function noop() { }
 async_wrap.setupHooks({ init });
 async_wrap.enable();
 
-server = net.createServer(function(c) {
+const server = net.createServer(function(c) {
   client = c;
   // Allow init callback to run before closing.
   setImmediate(() => {

test/parallel/test-async-wrap-propagate-parent.js

@@ -9,7 +9,6 @@ const providers = Object.keys(async_wrap.Providers);
 const uidSymbol = Symbol('uid');
 
 let cntr = 0;
-let server;
 let client;
 
 function init(uid, type, parentUid, parentHandle) {
@@ -34,7 +33,7 @@ function noop() { }
 async_wrap.setupHooks({ init });
 async_wrap.enable();
 
-server = net.createServer(function(c) {
+const server = net.createServer(function(c) {
   client = c;
   // Allow init callback to run before closing.
   setImmediate(() => {

test/parallel/test-stream-writev.js

@@ -43,8 +43,7 @@ function test(decode, uncork, multi, next) {
     assert(false, 'Should not call _write');
   };
 
-  var expectChunks = decode ?
-    [
+  var expectChunks = decode ? [
     { encoding: 'buffer',
       chunk: [104, 101, 108, 108, 111, 44, 32] },
     { encoding: 'buffer',

test/parallel/test-timers-immediate.js

@@ -5,7 +5,6 @@ var assert = require('assert');
 let immediateA = false;
 let immediateB = false;
 let immediateC = [];
-let before;
 
 setImmediate(function() {
   try {
@@ -16,7 +15,7 @@ setImmediate(function() {
   clearImmediate(immediateB);
 });
 
-before = process.hrtime();
+const before = process.hrtime();
 
 immediateB = setImmediate(function() {
   immediateB = true;

test/parallel/test-timers-unref.js

@@ -7,7 +7,7 @@ let timeout_fired = false;
 let unref_interval = false;
 let unref_timer = false;
 let unref_callbacks = 0;
-let interval, check_unref, checks = 0;
+let checks = 0;
 
 var LONG_TIME = 10 * 1000;
 var SHORT_TIME = 100;
@@ -28,7 +28,7 @@ setTimeout(function() {
   timeout_fired = true;
 }, LONG_TIME).unref();
 
-interval = setInterval(function() {
+const interval = setInterval(function() {
   unref_interval = true;
   clearInterval(interval);
 }, SHORT_TIME);
@@ -38,7 +38,7 @@ setTimeout(function() {
   unref_timer = true;
 }, SHORT_TIME).unref();
 
-check_unref = setInterval(function() {
+const check_unref = setInterval(function() {
   if (checks > 5 || (unref_interval && unref_timer))
     clearInterval(check_unref);
   checks += 1;