refactor(friend-support): implement suggested changes

- remove unused import statements and variables
- improve variables naming
- deconstruct objects used as inputs

js/tests/friend-support_test.mjs

@@ -1,7 +1,6 @@
 import { once } from 'node:events'
 import * as cp from 'node:child_process'
 import { mkdir, writeFile, chmod } from 'fs/promises'
-import { tmpdir } from 'node:os'
 import { join } from 'path'
 
 export const tests = []
@@ -25,7 +24,7 @@ export const setup = async ({ randStr }) => {
 
   const sendRequest = async (path, options) => {
     const response = await fetch(`http://localhost:${port}${path}`, options)
-    const { status, statusText, ok } = response
+    const { status } = response
     const headers = Object.fromEntries(response.headers)
     let body = ''
     try {
@@ -39,14 +38,14 @@ export const setup = async ({ randStr }) => {
   return { tmpPath: dir, createFilesIn, sendRequest }
 }
 
-tests.push(async ({ path, ctx }) => {
-  ctx.server = cp.spawn('node', [`${path}`])
+tests.push(async ({ path, ctx: { server } }) => {
+  server = cp.spawn('node', [`${path}`])
   const message = await Promise.race([
-    once(ctx.server.stdout, 'data'),
+    once(server.stdout, 'data'),
     Promise.race([
-      once(ctx.server.stderr, 'data').then(String).then(Error),
-      once(ctx.server, 'error'),
-    ]).then(x => Promise.reject(x)),
+      once(server.stderr, 'data').then(String).then(Error),
+      once(server, 'error'),
+    ]).then(result => Promise.reject(result)),
   ])
   return message[0].toString().includes(port)
 })
@@ -55,7 +54,7 @@ tests.push(async ({ eq, ctx, randStr }) => {
   // test for one guest
   const expBody = { message: 'ciao' }
   const files = [[`mario_${ctx.randLastName}.json`, expBody]]
-  const dirName = `guests`
+  const dirName = 'guests'
   const dirPath = join(ctx.tmpPath, dirName)
   await ctx.createFilesIn({ dirPath, files })
 
@@ -79,7 +78,7 @@ tests.push(async ({ eq, ctx, randStr }) => {
   )
 })
 
-tests.push(async ({ eq, ctx, randStr }) => {
+tests.push(async ({ eq, ctx }) => {
   // test server failed
   // change permission for existing file
   await chmod(`${ctx.tmpPath}/guests/mario_${ctx.randLastName}.json`, 0)