test: refactor test-stream2-writable

* add duration to setTimeout()
* assert.equal() -> assert.strictEqual()
* remove unused function arguments
* normalize indentation

PR-URL: #10353
Reviewed-By: Julian Duque <julianduquej@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

Author: Trott

test/parallel/test-stream2-writable.js

@@ -45,8 +45,8 @@ function run() {
   var fn = next[1];
   console.log('# %s', name);
   fn({
-    same: assert.deepEqual,
-    equal: assert.equal,
+    same: assert.deepStrictEqual,
+    equal: assert.strictEqual,
     end: function() {
       count--;
       run();
@@ -56,7 +56,7 @@ function run() {
 
 // ensure all tests have run
 process.on('exit', function() {
-  assert.equal(count, 0);
+  assert.strictEqual(count, 0);
 });
 
 process.nextTick(run);
@@ -136,17 +136,17 @@ test('write bufferize', function(t) {
   });
 
   var encodings =
-      [ 'hex',
-        'utf8',
-        'utf-8',
-        'ascii',
-        'binary',
-        'base64',
-        'ucs2',
-        'ucs-2',
-        'utf16le',
-        'utf-16le',
-        undefined ];
+    [ 'hex',
+      'utf8',
+      'utf-8',
+      'ascii',
+      'binary',
+      'base64',
+      'ucs2',
+      'ucs-2',
+      'utf16le',
+      'utf-16le',
+      undefined ];
 
   tw.on('finish', function() {
     t.same(tw.buffer, chunks, 'got the expected chunks');
@@ -173,17 +173,17 @@ test('write no bufferize', function(t) {
   };
 
   var encodings =
-      [ 'hex',
-        'utf8',
-        'utf-8',
-        'ascii',
-        'binary',
-        'base64',
-        'ucs2',
-        'ucs-2',
-        'utf16le',
-        'utf-16le',
-        undefined ];
+    [ 'hex',
+      'utf8',
+      'utf-8',
+      'ascii',
+      'binary',
+      'base64',
+      'ucs2',
+      'ucs-2',
+      'utf16le',
+      'utf-16le',
+      undefined ];
 
   tw.on('finish', function() {
     t.same(tw.buffer, chunks, 'got the expected chunks');
@@ -199,7 +199,7 @@ test('write no bufferize', function(t) {
 
 test('write callbacks', function(t) {
   var callbacks = chunks.map(function(chunk, i) {
-    return [i, function(er) {
+    return [i, function() {
       callbacks._called[i] = chunk;
     }];
   }).reduce(function(set, x) {
@@ -270,7 +270,7 @@ test('end callback called after write callback', function(t) {
 test('encoding should be ignored for buffers', function(t) {
   var tw = new W();
   var hex = '018b5e9a8f6236ffe30e31baf80d2cf6eb';
-  tw._write = function(chunk, encoding, cb) {
+  tw._write = function(chunk) {
     t.equal(chunk.toString('hex'), hex);
     t.end();
   };
@@ -282,7 +282,7 @@ test('writables are not pipable', function(t) {
   var w = new W();
   w._write = function() {};
   var gotError = false;
-  w.on('error', function(er) {
+  w.on('error', function() {
     gotError = true;
   });
   w.pipe(process.stdout);
@@ -295,7 +295,7 @@ test('duplexes are pipable', function(t) {
   d._read = function() {};
   d._write = function() {};
   var gotError = false;
-  d.on('error', function(er) {
+  d.on('error', function() {
     gotError = true;
   });
   d.pipe(process.stdout);
@@ -329,7 +329,7 @@ test('dont end while writing', function(t) {
     setTimeout(function() {
       this.writing = false;
       cb();
-    });
+    }, 1);
   };
   w.on('finish', function() {
     assert(wrote);
@@ -366,7 +366,7 @@ test('finish does not come before sync _write cb', function(t) {
     assert(writeCb);
     t.end();
   });
-  w.write(Buffer(0), function(er) {
+  w.write(Buffer.alloc(0), function() {
     writeCb = true;
   });
   w.end();