From 628e3139496728e25dead3760f47e011a9351629 Mon Sep 17 00:00:00 2001
From: Mert Can Altin <mert.altin@trendyol.com>
Date: Sat, 9 Mar 2024 12:41:51 +0300
Subject: [PATCH 1/3] fetch: improve util.inspect output for web specifications

---
 lib/web/fetch/headers.js             | 14 ++++++++++++++
 test/fetch/headers-inspect-custom.js | 18 ++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 test/fetch/headers-inspect-custom.js

diff --git a/lib/web/fetch/headers.js b/lib/web/fetch/headers.js
index b3ec5a70711..cd1e02901ab 100644
--- a/lib/web/fetch/headers.js
+++ b/lib/web/fetch/headers.js
@@ -12,6 +12,7 @@ const {
 } = require('./util')
 const { webidl } = require('./webidl')
 const assert = require('node:assert')
+const util = require('util')
 
 const kHeadersMap = Symbol('headers map')
 const kHeadersSortedMap = Symbol('headers map sorted')
@@ -576,8 +577,21 @@ class Headers {
 
     return this[kHeadersList]
   }
+
+  [util.inspect.custom] (depth, options) {
+    const headerString = Array.from(this[kHeadersList])
+      .map(([name, value]) =>
+          `${name.replace(/\b\w/g, (char) =>
+            char.toUpperCase())}: ${value}`)
+      .join('\n')
+    return 'Headers:\n' + headerString
+  }
 }
 
+Object.defineProperty(Headers.prototype, util.inspect.custom, {
+  enumerable: false
+})
+
 iteratorMixin('Headers', Headers, kHeadersSortedMap, 0, 1)
 
 Object.defineProperties(Headers.prototype, {
diff --git a/test/fetch/headers-inspect-custom.js b/test/fetch/headers-inspect-custom.js
new file mode 100644
index 00000000000..7c1a0fe9f63
--- /dev/null
+++ b/test/fetch/headers-inspect-custom.js
@@ -0,0 +1,18 @@
+'use strict'
+
+const { Headers } = require('../../lib/web/fetch/headers')
+const { test } = require('node:test')
+const assert = require('node:assert')
+const util = require('util')
+
+test('Headers class custom inspection', () => {
+  const headers = new Headers()
+  headers.set('content-Type', 'application/json')
+  headers.set('authorization', 'Bearer token')
+
+  const inspectedOutput = util.inspect(headers, { depth: 1 })
+
+  const expectedOutput =
+    'Headers:\nContent-Type: application/json\nAuthorization: Bearer token'
+  assert.strictEqual(inspectedOutput, expectedOutput)
+})

From 1ff0166cf16dc21df71787b7d96a5259d6859830 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mert=20Can=20Alt=C4=B1n?= <mertgold60@gmail.com>
Date: Sat, 9 Mar 2024 22:31:04 +0300
Subject: [PATCH 2/3] Update headers.js

Co-authored-by: Khafra <maitken033380023@gmail.com>
---
 lib/web/fetch/headers.js | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/lib/web/fetch/headers.js b/lib/web/fetch/headers.js
index cd1e02901ab..c8a9f416933 100644
--- a/lib/web/fetch/headers.js
+++ b/lib/web/fetch/headers.js
@@ -579,12 +579,9 @@ class Headers {
   }
 
   [util.inspect.custom] (depth, options) {
-    const headerString = Array.from(this[kHeadersList])
-      .map(([name, value]) =>
-          `${name.replace(/\b\w/g, (char) =>
-            char.toUpperCase())}: ${value}`)
-      .join('\n')
-    return 'Headers:\n' + headerString
+    const inspected = util.inspect(this[kHeadersList].entries)
+    
+    return `Headers ${inspected}`
   }
 }
 

From 10f46e8737913f0785b86b21540abf3a816990f3 Mon Sep 17 00:00:00 2001
From: Mert Can Altin <mert.altin@trendyol.com>
Date: Sun, 10 Mar 2024 12:41:29 +0300
Subject: [PATCH 3/3] fix: test repair

---
 lib/web/fetch/headers.js             | 2 +-
 test/fetch/headers-inspect-custom.js | 7 +++----
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/web/fetch/headers.js b/lib/web/fetch/headers.js
index c8a9f416933..b2580e90e04 100644
--- a/lib/web/fetch/headers.js
+++ b/lib/web/fetch/headers.js
@@ -580,7 +580,7 @@ class Headers {
 
   [util.inspect.custom] (depth, options) {
     const inspected = util.inspect(this[kHeadersList].entries)
-    
+
     return `Headers ${inspected}`
   }
 }
diff --git a/test/fetch/headers-inspect-custom.js b/test/fetch/headers-inspect-custom.js
index 7c1a0fe9f63..1aa3326e98c 100644
--- a/test/fetch/headers-inspect-custom.js
+++ b/test/fetch/headers-inspect-custom.js
@@ -7,12 +7,11 @@ const util = require('util')
 
 test('Headers class custom inspection', () => {
   const headers = new Headers()
-  headers.set('content-Type', 'application/json')
-  headers.set('authorization', 'Bearer token')
+  headers.set('Content-Type', 'application/json')
+  headers.set('Authorization', 'Bearer token')
 
   const inspectedOutput = util.inspect(headers, { depth: 1 })
 
-  const expectedOutput =
-    'Headers:\nContent-Type: application/json\nAuthorization: Bearer token'
+  const expectedOutput = "Headers { 'Content-Type': 'application/json', Authorization: 'Bearer token' }"
   assert.strictEqual(inspectedOutput, expectedOutput)
 })