chore: replace happy-dom with node environment in tests

Author: gkoos

package-lock.json

@@ -95,7 +95,6 @@
     "@typescript-eslint/parser": "^8.39.0",
     "@vitest/coverage-v8": "^4.1.8",
     "eslint": "^10.4.1",
-    "happy-dom": "^20.9.0",
     "husky": "^9.1.7",
     "jsr": "^0.14.3",
     "lint-staged": "^17.0.5",

package.json

@@ -461,7 +461,7 @@ describe('Retry-After header', () => {
         get: (name: string) => (name === 'Retry-After' ? '2' : undefined),
       },
     })
-    const ctx = { attempt: 1, request: new Request('x'), response }
+    const ctx = { attempt: 1, request: new Request('https://example.com'), response }
     const delay =
       typeof defaultDelay === 'function' ? defaultDelay(ctx) : defaultDelay
     expect(delay).toBe(2000)
@@ -480,7 +480,7 @@ describe('Retry-After header', () => {
           get: (name: string) => (name === 'Retry-After' ? date : undefined),
         },
       })
-      const ctx = { attempt: 1, request: new Request('x'), response }
+      const ctx = { attempt: 1, request: new Request('https://example.com'), response }
       const delay =
         typeof defaultDelay === 'function' ? defaultDelay(ctx) : defaultDelay
       expect(delay).toBe(5000)

test/core/client.test.ts

@@ -1,10 +1,3 @@
-// @vitest-environment node
-// This test MUST run in the Node.js environment (not happy-dom) because only
-// Node.js/undici enforces the Fetch API spec rule that constructing a new Request
-// from an already-consumed Request throws:
-//   "Cannot construct a Request with a Request object that has already been used."
-// happy-dom silently copies the body, masking the regression.
-
 import { createServer } from 'node:http'
 import type { Server, IncomingMessage, ServerResponse } from 'node:http'
 import { describe, it, expect, beforeAll, afterAll } from 'vitest'

test/integration/retry-post-body.integration.test.ts

@@ -3,7 +3,7 @@ import { defineConfig } from 'vitest/config'
 export default defineConfig({
   test: {
     globals: true,
-    environment: 'happy-dom', // fetch in browser-like env
+    environment: 'node',
     coverage: {
       reporter: ['text', 'lcov', 'html'],
       exclude: ['coverage/**', 'dist/**', '**/*.config.*', '**/*.test.*'],