Analyze page size and fix frontend tests

1 files changed, 39 insertions, 0 deletions

diff --git a/frontend/src/setupTests.ts b/frontend/src/setupTests.ts
index 7b0828b..2afa12e 100644
--- a/frontend/src/setupTests.ts
+++ b/frontend/src/setupTests.ts
@@ -1 +1,40 @@
 import '@testing-library/jest-dom';
+
+// Mock IntersectionObserver
+class IntersectionObserver {
+    readonly root: Element | null = null;
+    readonly rootMargin: string = '';
+    readonly thresholds: ReadonlyArray<number> = [];
+
+    constructor(callback: IntersectionObserverCallback, options?: IntersectionObserverInit) {
+        // nothing
+    }
+
+    observe(target: Element): void {
+        // nothing
+    }
+
+    unobserve(target: Element): void {
+        // nothing
+    }
+
+    disconnect(): void {
+        // nothing
+    }
+
+    takeRecords(): IntersectionObserverEntry[] {
+        return [];
+    }
+}
+
+Object.defineProperty(window, 'IntersectionObserver', {
+    writable: true,
+    configurable: true,
+    value: IntersectionObserver,
+});
+
+Object.defineProperty(global, 'IntersectionObserver', {
+    writable: true,
+    configurable: true,
+    value: IntersectionObserver,
+});