test: use os.tmpdir

Author: hi-ogawa

packages/plugin-rsc/e2e/basic.test.ts

@@ -3,6 +3,8 @@ import { readFileSync } from 'node:fs'
 import { type Page, expect, test } from '@playwright/test'
 import { type Fixture, setupIsolatedFixture, useFixture } from './fixture'
 import { expectNoReload, testNoJs, waitForHydration } from './helper'
+import os from 'node:os'
+import path from 'node:path'
 
 // TODO: parallel?
 // TODO: all tests don't need to be tested in all variants?
@@ -109,7 +111,7 @@ test.describe.only(() => {
   // disabled by default
   // if (process.env.TEST_ISOLATED !== 'true') return
 
-  let tmpRoot = '/tmp/test-vite-rsc'
+  let tmpRoot = path.join(os.tmpdir(), 'test-vite-rsc')
   test.beforeAll(async () => {
     await setupIsolatedFixture({ src: 'examples/basic', dest: tmpRoot })
     // try {