test: add tmpdir.resolve()

PR-URL: #49079
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

Author: LiviaMedeiros

test/common/README.md

@@ -1027,6 +1027,13 @@ Avoid calling it more than once in an asynchronous context as one call
 might refresh the temporary directory of a different context, causing
 the test to fail somewhat mysteriously.
 
+### `resolve([...paths])`
+
+*`...paths`[\<string>][<string>]
+* return [\<string>][<string>]
+
+Resolves a sequence of paths into absolute path in the temporary directory.
+
 ### `hasEnoughSpace(size)`
 
 *`size`[\<number>][<number>] Required size, in bytes.

test/common/tmpdir.js

@@ -55,6 +55,10 @@ function onexit() {
 }
 }
 
+functionresolve(...paths){
+returnpath.resolve(tmpPath, ...paths);
+}
+
 functionhasEnoughSpace(size){
 const{ bavail, bsize }=fs.statfsSync(tmpPath);
 returnbavail>=Math.ceil(size/bsize);
@@ -64,4 +68,5 @@ module.exports = {
 path: tmpPath,
  refresh,
  hasEnoughSpace,
+ resolve,
 };