From 7d92dff12d7c4058b57c7e77adeb0a76ffab639f Mon Sep 17 00:00:00 2001
From: Jake Champion <jchampion@fastly.com>
Date: Mon, 17 Jul 2023 23:52:08 +0100
Subject: [PATCH] fix: when no body supplied, do not set bodyUsed to true

---
 fetch.js     | 2 ++
 test/test.js | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/fetch.js b/fetch.js
index 37b98218..c4162dae 100644
--- a/fetch.js
+++ b/fetch.js
@@ -162,6 +162,7 @@ if (support.iterable) {
 }
 
 function consumed(body) {
+  if (body._noBody) return
   if (body.bodyUsed) {
     return Promise.reject(new TypeError('Already read'))
   }
@@ -231,6 +232,7 @@ function Body() {
     this.bodyUsed = this.bodyUsed
     this._bodyInit = body
     if (!body) {
+      this._noBody = true;
       this._bodyText = ''
     } else if (typeof body === 'string') {
       this._bodyText = body
diff --git a/test/test.js b/test/test.js
index d6431f40..8508610b 100644
--- a/test/test.js
+++ b/test/test.js
@@ -996,6 +996,15 @@ exercise.forEach(function(exerciseMode) {
               assert(error instanceof TypeError, 'Promise rejected after body consumed')
             })
         })
+
+        test('does not set bodyUsed to true if no body supplied', function() {
+          var response = new Response();
+          assert(response.text, 'Body does not implement text')
+          assert.equal(response.bodyUsed, false)
+          response.text()
+          assert.equal(response.bodyUsed, false)
+          return response.text()
+        })
       })
     })