From a6e2962319867ad3606921792e5d9cf838b687c6 Mon Sep 17 00:00:00 2001
From: Ashley Harrison <ashley.harrison@grafana.com>
Date: Mon, 9 Sep 2024 17:02:51 +0100
Subject: [PATCH] update mock to work with react-virtual

---
 public/test/jest-setup.ts | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/public/test/jest-setup.ts b/public/test/jest-setup.ts
index ceda333c3d5..f47f43ecb60 100644
--- a/public/test/jest-setup.ts
+++ b/public/test/jest-setup.ts
@@ -88,8 +88,6 @@ throwUnhandledRejections();
 
 // Used by useMeasure
 global.ResizeObserver = class ResizeObserver {
-  //callback: ResizeObserverCallback;
-
   constructor(callback: ResizeObserverCallback) {
     setTimeout(() => {
       callback(
@@ -105,8 +103,11 @@ global.ResizeObserver = class ResizeObserver {
               left: 100,
               right: 0,
             },
-            target: {},
-          } as ResizeObserverEntry,
+            target: {
+              // Needed for react-virtual to work in tests
+              getAttribute: () => 1,
+            },
+          } as unknown as ResizeObserverEntry,
         ],
         this
       );