`vp test` fails with ws CJS named export error when `nitro.preset` is `cloudflare_module`

[Charles5277]

Describe the bug

When using import { ... } from 'vite-plus/test' in a Nuxt project with nitro.preset: 'cloudflare_module' (or 'cloudflare_pages'), vp test run fails with:

SyntaxError: Named export 'WebSocketServer' not found. The requested module 'ws' is a CommonJS module, which may not support all module.exports as named exports.

The same test passes when:

• Using import { ... } from 'vitest' instead of 'vite-plus/test'
• Removing the nitro.preset (default or 'node')

The Cloudflare nitro preset appears to change how Nuxt/Nitro resolves modules (likely via unenv or Cloudflare polyfills), causing ws to be loaded through Node's native ESM import() instead of vite-plus's module transform pipeline. Node's native ESM import cannot destructure CJS named exports from ws.

Note: server.deps.inline: ['ws'] in vitest.config.ts does NOT fix this.

Reproduction

https://github.com/Charles5277/viteplus-ws-repro

Steps to reproduce

git clone https://github.com/Charles5277/viteplus-ws-repro.git
cd viteplus-ws-repro
pnpm install
npx vp test run        # ❌ fails with ws CJS error

To verify:

# Remove cloudflare preset → passes
sed -i '' '/preset/d' nuxt.config.ts
npx vp test run        # ✅ passes

System Info

vp v0.1.11

Local vite-plus:
  vite-plus  v0.1.11

Tools:
  vite             v8.0.0
  rolldown         v1.0.0-rc.9
  vitest           v4.1.0
  oxfmt            v0.40.0
  oxlint           v1.55.0
  oxlint-tsgolint  v0.16.0
  tsdown           v0.21.2

Node.js: v24.11.1
macOS Darwin 25.3.0

Used Package Manager

pnpm

Logs

SyntaxError: Named export 'WebSocketServer' not found. The requested module 'ws' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'ws';
const { WebSocketServer } = pkg;

 ❯ VitestModuleEvaluator.runExternalModule node_modules/.pnpm/@voidzero-dev+vite-plus-test@0.1.11_.../dist/module-evaluator.js:80:23
 ❯ VitestModuleRunner.directRequest node_modules/.pnpm/@voidzero-dev+vite-plus-core@0.1.11_.../dist/vite/node/module-runner.js:1206:18
 ❯ test/example.test.ts:1:1

Validations

• Read the Contributing Guidelines.
• Check that there isn't already an issue for the same bug.
• Confirm this is a Vite+ issue and not an upstream issue (Vite, Vitest, tsdown, Rolldown, or Oxc).
• The provided reproduction is a minimal reproducible example.