test: refactor test-fs-stat.js

General code cleanup.

PR-URL: #28929
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: Trott

test/parallel/test-fs-stat.js

@@ -28,17 +28,14 @@ const fs = require('fs');
 fs.stat('.', common.mustCall(function(err, stats) {
   assert.ifError(err);
   assert.ok(stats.mtime instanceof Date);
+  assert.ok(stats.hasOwnProperty('blksize'));
+  assert.ok(stats.hasOwnProperty('blocks'));
   // Confirm that we are not running in the context of the internal binding
   // layer.
   // Ref: https://github.com/nodejs/node/commit/463d6bac8b349acc462d345a6e298a76f7d06fb1
   assert.strictEqual(this, undefined);
 }));
 
-fs.stat('.', common.mustCall(function(err, stats) {
-  assert.ok(stats.hasOwnProperty('blksize'));
-  assert.ok(stats.hasOwnProperty('blocks'));
-}));
-
 fs.lstat('.', common.mustCall(function(err, stats) {
   assert.ifError(err);
   assert.ok(stats.mtime instanceof Date);
@@ -71,16 +68,9 @@ fs.open('.', 'r', undefined, common.mustCall(function(err, fd) {
 
 // fstatSync
 fs.open('.', 'r', undefined, common.mustCall(function(err, fd) {
-  let stats;
-  try {
-    stats = fs.fstatSync(fd);
-  } catch (err) {
-    assert.fail(err);
-  }
-  if (stats) {
-    assert.ok(stats.mtime instanceof Date);
-  }
-  fs.close(fd, assert.ifError);
+  const stats = fs.fstatSync(fd);
+  assert.ok(stats.mtime instanceof Date);
+  fs.close(fd, common.mustCall(assert.ifError));
 }));
 
 fs.stat(__filename, common.mustCall(function(err, s) {
@@ -92,38 +82,30 @@ fs.stat(__filename, common.mustCall(function(err, s) {
   assert.strictEqual(s.isCharacterDevice(), false);
   assert.strictEqual(s.isFIFO(), false);
   assert.strictEqual(s.isSymbolicLink(), false);
-  const keys = [
+
+  const jsonString = JSON.stringify(s);
+  const parsed = JSON.parse(jsonString);
+  [
     'dev', 'mode', 'nlink', 'uid',
     'gid', 'rdev', 'blksize', 'ino', 'size', 'blocks',
     'atime', 'mtime', 'ctime', 'birthtime',
-    'atimeMs', 'mtimeMs', 'ctimeMs', 'birthtimeMs'
-  ];
-  const numberFields = [
-    'dev', 'mode', 'nlink', 'uid', 'gid', 'rdev', 'blksize', 'ino', 'size',
-    'blocks', 'atimeMs', 'mtimeMs', 'ctimeMs', 'birthtimeMs'
-  ];
-  const dateFields = ['atime', 'mtime', 'ctime', 'birthtime'];
-  keys.forEach(function(k) {
+    'atimeMs', 'mtimeMs', 'ctimeMs', 'birthtimeMs',
+  ].forEach(function(k) {
     assert.ok(k in s, `${k} should be in Stats`);
     assert.notStrictEqual(s[k], undefined, `${k} should not be undefined`);
     assert.notStrictEqual(s[k], null, `${k} should not be null`);
-  });
-  numberFields.forEach((k) => {
-    assert.strictEqual(typeof s[k], 'number', `${k} should be a number`);
-  });
-  dateFields.forEach((k) => {
-    assert.ok(s[k] instanceof Date, `${k} should be a Date`);
-  });
-  const jsonString = JSON.stringify(s);
-  const parsed = JSON.parse(jsonString);
-  keys.forEach(function(k) {
     assert.notStrictEqual(parsed[k], undefined, `${k} should not be undefined`);
     assert.notStrictEqual(parsed[k], null, `${k} should not be null`);
   });
-  numberFields.forEach((k) => {
+  [
+    'dev', 'mode', 'nlink', 'uid', 'gid', 'rdev', 'blksize', 'ino', 'size',
+    'blocks', 'atimeMs', 'mtimeMs', 'ctimeMs', 'birthtimeMs',
+  ].forEach((k) => {
+    assert.strictEqual(typeof s[k], 'number', `${k} should be a number`);
     assert.strictEqual(typeof parsed[k], 'number', `${k} should be a number`);
   });
-  dateFields.forEach((k) => {
+  ['atime', 'mtime', 'ctime', 'birthtime'].forEach((k) => {
+    assert.ok(s[k] instanceof Date, `${k} should be a Date`);
     assert.strictEqual(typeof parsed[k], 'string', `${k} should be a string`);
   });
 }));