From 0c724e3590995aea29f90e8d8e9def9df6790f40 Mon Sep 17 00:00:00 2001
From: shamoon <4887959+shamoon@users.noreply.github.com>
Date: Thu, 3 Jul 2025 12:03:18 -0700
Subject: [PATCH] Mock IntersectionObserver in Jest setup

---
 src-ui/setup-jest.ts | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src-ui/setup-jest.ts b/src-ui/setup-jest.ts
index fbbb624db..de28ecb8b 100644
--- a/src-ui/setup-jest.ts
+++ b/src-ui/setup-jest.ts
@@ -119,6 +119,26 @@ Object.defineProperty(window, 'location', {
   value: { reload: jest.fn() },
 })
 
+if (typeof IntersectionObserver === 'undefined') {
+  class MockIntersectionObserver {
+    constructor(
+      public callback: IntersectionObserverCallback,
+      public options?: IntersectionObserverInit
+    ) {}
+
+    observe = jest.fn()
+    unobserve = jest.fn()
+    disconnect = jest.fn()
+    takeRecords = jest.fn()
+  }
+
+  Object.defineProperty(window, 'IntersectionObserver', {
+    writable: true,
+    configurable: true,
+    value: MockIntersectionObserver,
+  })
+}
+
 HTMLCanvasElement.prototype.getContext = <
   typeof HTMLCanvasElement.prototype.getContext
 >jest.fn()