test: change forEach to for...of in path extname

PR-URL: #50667
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

test/parallel/test-path-extname.js

@@ -6,7 +6,7 @@ const path = require('path');
 const failures = [];
 const slashRE = /\//g;
 
-[
+const testPaths = [
   [__filename, '.js'],
   ['', ''],
   ['/path/to/file', ''],
@@ -50,10 +50,13 @@ const slashRE = /\//g;
   ['file//', ''],
   ['file./', '.'],
   ['file.//', '.'],
-].forEach((test) => {
-  const expected = test[1];
-  [path.posix.extname, path.win32.extname].forEach((extname) => {
-    let input = test[0];
+];
+
+for (const testPath of testPaths) {
+  const expected = testPath[1];
+  const extNames = [path.posix.extname, path.win32.extname];
+  for (const extname of extNames) {
+    let input = testPath[0];
     let os;
     if (extname === path.win32.extname) {
       input = input.replace(slashRE, '\\');
@@ -66,16 +69,14 @@ const slashRE = /\//g;
       JSON.stringify(expected)}\n  actual=${JSON.stringify(actual)}`;
     if (actual !== expected)
       failures.push(`\n${message}`);
-  });
-  {
-    const input = `C:${test[0].replace(slashRE, '\\')}`;
-    const actual = path.win32.extname(input);
-    const message = `path.win32.extname(${JSON.stringify(input)})\n  expect=${
-      JSON.stringify(expected)}\n  actual=${JSON.stringify(actual)}`;
-    if (actual !== expected)
-      failures.push(`\n${message}`);
   }
-});
+  const input = `C:${testPath[0].replace(slashRE, '\\')}`;
+  const actual = path.win32.extname(input);
+  const message = `path.win32.extname(${JSON.stringify(input)})\n  expect=${
+    JSON.stringify(expected)}\n  actual=${JSON.stringify(actual)}`;
+  if (actual !== expected)
+    failures.push(`\n${message}`);
+}
 assert.strictEqual(failures.length, 0, failures.join(''));
 
 // On Windows, backslash is a path separator.