test(Layout-massive-scaling): verify Massive Data Sets and Extreme High Bounds Scaling (Variation 2)

app/layout.massive-scaling.test.tsx

@@ -0,0 +1,92 @@
+import React from 'react';
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import RootLayout from './layout';
+
+vi.mock('next/font/google', () => ({
+  Inter: () => ({ className: 'inter-font' }),
+}));
+
+vi.mock('@vercel/analytics/next', () => ({
+  Analytics: () => <div data-testid="mock-analytics" />,
+}));
+
+vi.mock('./components/navbar', () => ({
+  default: () => <nav data-testid="mock-navbar" />,
+}));
+
+vi.mock('@/components/BrandParticles', () => ({
+  default: () => <div data-testid="mock-brand-particles" />,
+}));
+
+vi.mock('@/components/ReturnToTop', () => ({
+  default: () => <div data-testid="mock-return-to-top" />,
+}));
+
+vi.mock('./components/ScrollRestoration', () => ({
+  default: () => <div data-testid="mock-scroll-restoration" />,
+}));
+
+vi.mock('./providers', () => ({
+  Providers: ({ children }: { children: React.ReactNode }) => (
+    <div data-testid="mock-providers">{children}</div>
+  ),
+}));
+
+vi.mock('@/components/AnimatedCursor', () => ({
+  default: () => <div data-testid="mock-animated-cursor" />,
+}));
+
+vi.mock('@/components/KonamiEasterEgg', () => ({
+  default: () => <div data-testid="mock-konami-easter-egg" />,
+}));
+
+describe('Layout - Massive Data Sets and Extreme High Bounds Scaling', () => {
+  it('renders thousands of child elements without layout breakage', () => {
+    const massiveChildren = Array.from({ length: 5000 }, (_, i) => (
+      <div key={i}>Contributor {i}</div>
+    ));
+    render(<RootLayout>{massiveChildren}</RootLayout>);
+
+    expect(screen.getByText('Contributor 0')).toBeInTheDocument();
+    expect(screen.getByText('Contributor 4999')).toBeInTheDocument();
+  });
+
+  it('handles extremely large text content without crashing', () => {
+    const hugeText = 'A'.repeat(100000);
+    render(
+      <RootLayout>
+        <div>{hugeText}</div>
+      </RootLayout>
+    );
+    expect(screen.getByText(hugeText)).toBeInTheDocument();
+  });
+
+  it('renders all layout shell components under massive child load', () => {
+    const massiveChildren = Array.from({ length: 2000 }, (_, i) => <p key={i}>Activity log {i}</p>);
+    render(<RootLayout>{massiveChildren}</RootLayout>);
+
+    expect(screen.getByTestId('mock-navbar')).toBeInTheDocument();
+    expect(screen.getByTestId('mock-providers')).toBeInTheDocument();
+    expect(screen.getByTestId('mock-return-to-top')).toBeInTheDocument();
+  });
+
+  it('renders nested large structures correctly without overflow', () => {
+    const nestedContent = Array.from({ length: 1000 }, (_, i) => (
+      <div key={i}>
+        <span>User {i}</span>
+      </div>
+    ));
+    render(<RootLayout>{nestedContent}</RootLayout>);
+
+    expect(screen.getByText('User 0')).toBeInTheDocument();
+    expect(screen.getByText('User 999')).toBeInTheDocument();
+  });
+
+  it('renders without crashing under extreme load of 10000 elements', () => {
+    const extremeContent = Array.from({ length: 10000 }, (_, i) => <div key={i}>Record {i}</div>);
+    expect(() => {
+      render(<RootLayout>{extremeContent}</RootLayout>);
+    }).not.toThrow();
+  });
+});