From a879c7d73257131130f60ab69ea11983c6069e71 Mon Sep 17 00:00:00 2001
From: Ugaitz Urien <ugaitz.urien@datadoghq.com>
Date: Thu, 28 Nov 2024 14:55:30 +0100
Subject: [PATCH] Fix original url instanceOf url.URL (#4955)

---
 packages/datadog-instrumentations/src/url.js       | 4 ++++
 packages/datadog-instrumentations/test/url.spec.js | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/packages/datadog-instrumentations/src/url.js b/packages/datadog-instrumentations/src/url.js
index 18edb0079e3..67bef7e8947 100644
--- a/packages/datadog-instrumentations/src/url.js
+++ b/packages/datadog-instrumentations/src/url.js
@@ -59,6 +59,10 @@ addHook({ name: names }, function (url) {
           isURL: true
         })
       }
+
+      static [Symbol.hasInstance] (instance) {
+        return instance instanceof URL
+      }
     }
   })
 
diff --git a/packages/datadog-instrumentations/test/url.spec.js b/packages/datadog-instrumentations/test/url.spec.js
index defb8f08193..57b99e5f897 100644
--- a/packages/datadog-instrumentations/test/url.spec.js
+++ b/packages/datadog-instrumentations/test/url.spec.js
@@ -1,6 +1,7 @@
 'use strict'
 
 const agent = require('../../dd-trace/test/plugins/agent')
+const { assert } = require('chai')
 const { channel } = require('../src/helpers/instrument')
 const names = ['url', 'node:url']
 
@@ -68,6 +69,13 @@ names.forEach(name => {
           }, sinon.match.any)
         })
 
+        it('instanceof should work also for original instances', () => {
+          const OriginalUrl = Object.getPrototypeOf(url.URL)
+          const originalUrl = new OriginalUrl('https://www.datadoghq.com')
+
+          assert.isTrue(originalUrl instanceof url.URL)
+        })
+
         ;['host', 'origin', 'hostname'].forEach(property => {
           it(`should publish on get ${property}`, () => {
             const urlObject = new url.URL('/path', 'https://www.datadoghq.com')