use bodyUnusable to check if body is unusable (#3460)

lib/web/fetch/body.js

@@ -414,7 +414,7 @@ async function consumeBody (object, convertBytesToJSValue, instance) {
 
   // 1. If object is unusable, then return a promise rejected
   //    with a TypeError.
-  if (bodyUnusable(object[kState].body)) {
+  if (bodyUnusable(object)) {
     throw new TypeError('Body is unusable: Body has already been read')
   }
 
@@ -454,7 +454,9 @@ async function consumeBody (object, convertBytesToJSValue, instance) {
 }
 
 // https://fetch.spec.whatwg.org/#body-unusable
-function bodyUnusable (body) {
+function bodyUnusable (object) {
+  const body = object[kState].body
+
   // An object including the Body interface mixin is
   // said to be unusable if its body is non-null and
   // its body’s stream is disturbed or locked.
@@ -496,5 +498,6 @@ module.exports = {
   extractBody,
   safelyExtractBody,
   cloneBody,
-  mixinBody
+  mixinBody,
+  bodyUnusable
 }

lib/web/fetch/request.js

@@ -2,7 +2,7 @@
 
 'use strict'
 
-const { extractBody, mixinBody, cloneBody } = require('./body')
+const { extractBody, mixinBody, cloneBody, bodyUnusable } = require('./body')
 const { Headers, fill: fillHeaders, HeadersList, setHeadersGuard, getHeadersGuard, setHeadersList, getHeadersList } = require('./headers')
 const { FinalizationRegistry } = require('./dispatcher-weakref')()
 const util = require('../../core/util')
@@ -557,7 +557,7 @@ class Request {
     // 40. If initBody is null and inputBody is non-null, then:
     if (initBody == null && inputBody != null) {
       // 1. If input is unusable, then throw a TypeError.
-      if (util.isDisturbed(inputBody.stream) || inputBody.stream.locked) {
+      if (bodyUnusable(input)) {
         throw new TypeError(
           'Cannot construct a Request with a Request object that has already been used.'
         )
@@ -759,7 +759,7 @@ class Request {
     webidl.brandCheck(this, Request)
 
     // 1. If this is unusable, then throw a TypeError.
-    if (this.bodyUsed || this.body?.locked) {
+    if (bodyUnusable(this)) {
       throw new TypeError('unusable')
     }
 

lib/web/fetch/response.js

@@ -1,7 +1,7 @@
 'use strict'
 
 const { Headers, HeadersList, fill, getHeadersGuard, setHeadersGuard, setHeadersList } = require('./headers')
-const { extractBody, cloneBody, mixinBody } = require('./body')
+const { extractBody, cloneBody, mixinBody, bodyUnusable } = require('./body')
 const util = require('../../core/util')
 const nodeUtil = require('node:util')
 const { kEnumerableProperty } = util
@@ -244,7 +244,7 @@ class Response {
     webidl.brandCheck(this, Response)
 
     // 1. If this is unusable, then throw a TypeError.
-    if (this.bodyUsed || this.body?.locked) {
+    if (bodyUnusable(this)) {
       throw webidl.errors.exception({
         header: 'Response.clone',
         message: 'Body has already been consumed.'