From 095b1dc06bf768c56604f9f0b7e731f7b394c5ad Mon Sep 17 00:00:00 2001
From: Khafra <maitken033380023@gmail.com>
Date: Sun, 18 Dec 2022 15:42:50 -0500
Subject: [PATCH] test: add regression test for #1814 (#1815)

---
 test/fetch/formdata.js | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/test/fetch/formdata.js b/test/fetch/formdata.js
index 9c4a574e420..e91893f1aa6 100644
--- a/test/fetch/formdata.js
+++ b/test/fetch/formdata.js
@@ -1,7 +1,7 @@
 'use strict'
 
 const { test } = require('tap')
-const { FormData, File } = require('../../')
+const { FormData, File, Response } = require('../../')
 const { Blob: ThirdPartyBlob } = require('formdata-node')
 const { Blob } = require('buffer')
 
@@ -296,3 +296,22 @@ test('arguments', (t) => {
 
   t.end()
 })
+
+// https://github.com/nodejs/undici/pull/1814
+test('FormData returned from bodyMixin.formData is not a clone', async (t) => {
+  const fd = new FormData()
+  fd.set('foo', 'bar')
+
+  const res = new Response(fd)
+  fd.set('foo', 'foo')
+
+  const fd2 = await res.formData()
+
+  t.equal(fd2.get('foo'), 'bar')
+  t.equal(fd.get('foo'), 'foo')
+
+  fd2.set('foo', 'baz')
+
+  t.equal(fd2.get('foo'), 'baz')
+  t.equal(fd.get('foo'), 'foo')
+})