test: refactor test-fs-write.js

Changed var to const and equal to strictEqual
PR-URL: #9982
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: hirabhullar

test/parallel/test-fs-write.js

@@ -1,26 +1,26 @@
 'use strict';
-varcommon=require('../common');
-varassert=require('assert');
-varpath=require('path');
-varBuffer=require('buffer').Buffer;
-varfs=require('fs');
-varfn=path.join(common.tmpDir,'write.txt');
-varfn2=path.join(common.tmpDir,'write2.txt');
-varexpected='ümlaut.';
-varconstants=fs.constants;
+constcommon=require('../common');
+constassert=require('assert');
+constpath=require('path');
+constBuffer=require('buffer').Buffer;
+constfs=require('fs');
+constfn=path.join(common.tmpDir,'write.txt');
+constfn2=path.join(common.tmpDir,'write2.txt');
+constexpected='ümlaut.';
+constconstants=fs.constants;
 
 common.refreshTmpDir();
 
 fs.open(fn,'w',0o644,common.mustCall(function(err,fd){
 if(err)throwerr;
 console.log('open done');
 fs.write(fd,'',0,'utf8',function(err,written){
-assert.equal(0,written);
+assert.strictEqual(0,written);
 });
 fs.write(fd,expected,0,'utf8',common.mustCall(function(err,written){
 console.log('write done');
 if(err)throwerr;
-assert.equal(Buffer.byteLength(expected),written);
+assert.strictEqual(Buffer.byteLength(expected),written);
 fs.closeSync(fd);
 constfound=fs.readFileSync(fn,'utf8');
 console.log('expected: "%s"',expected);
@@ -36,12 +36,12 @@ fs.open(fn2, constants.O_CREAT | constants.O_WRONLY | constants.O_TRUNC, 0o644,
 if(err)throwerr;
 console.log('open done');
 fs.write(fd,'',0,'utf8',(err,written)=>{
-assert.equal(0,written);
+assert.strictEqual(0,written);
 });
 fs.write(fd,expected,0,'utf8',common.mustCall((err,written)=>{
 console.log('write done');
 if(err)throwerr;
-assert.equal(Buffer.byteLength(expected),written);
+assert.strictEqual(Buffer.byteLength(expected),written);
 fs.closeSync(fd);
 constfound=fs.readFileSync(fn2,'utf8');
 console.log('expected: "%s"',expected);