From 018c6337ff9747b8a59422d4502bdb0f6d9b695f 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 c24762313..c52c00647 100644
--- a/src-ui/setup-jest.ts
+++ b/src-ui/setup-jest.ts
@@ -121,6 +121,26 @@ if (!URL.revokeObjectURL) {
 }
 Object.defineProperty(window, 'ResizeObserver', { value: mock() })
 
+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()