test(leaderboard): add theme contrast coverage

Author: imposterbharathkumarburugu15-cpu

components/Leaderboard.theme-contrast.test.tsx

@@ -0,0 +1,83 @@
+import { render } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import type { HTMLAttributes, ReactNode } from 'react';
+
+import Leaderboard from './Leaderboard';
+
+vi.mock('next/image', () => ({
+  default: () => null,
+}));
+
+vi.mock('framer-motion', () => ({
+  motion: {
+    div: ({
+      children,
+      ...props
+    }: HTMLAttributes<HTMLDivElement> & {
+      children?: ReactNode;
+    }) => <div {...props}>{children}</div>,
+  },
+}));
+
+describe('Leaderboard theme contrast behavior', () => {
+  const contributors = [
+    {
+      id: 1,
+      login: 'alice',
+      avatar_url: 'https://example.com/alice.png',
+      contributions: 100,
+      html_url: 'https://github.com/alice',
+    },
+    {
+      id: 2,
+      login: 'bob',
+      avatar_url: 'https://example.com/bob.png',
+      contributions: 90,
+      html_url: 'https://github.com/bob',
+    },
+    {
+      id: 3,
+      login: 'charlie',
+      avatar_url: 'https://example.com/charlie.png',
+      contributions: 80,
+      html_url: 'https://github.com/charlie',
+    },
+    {
+      id: 4,
+      login: 'david',
+      avatar_url: 'https://example.com/david.png',
+      contributions: 70,
+      html_url: 'https://github.com/david',
+    },
+  ];
+
+  it('renders leaderboard container', () => {
+    const { container } = render(<Leaderboard contributors={contributors} />);
+
+    expect(container.firstChild).toBeTruthy();
+  });
+
+  it('includes dark mode background classes', () => {
+    const { container } = render(<Leaderboard contributors={contributors} />);
+
+    expect(container.innerHTML).toContain('dark:bg');
+  });
+
+  it('includes dark mode text classes', () => {
+    const { container } = render(<Leaderboard contributors={contributors} />);
+
+    expect(container.innerHTML).toContain('dark:text-white');
+  });
+
+  it('includes dark mode border classes', () => {
+    const { container } = render(<Leaderboard contributors={contributors} />);
+
+    expect(container.innerHTML).toContain('dark:border');
+  });
+
+  it('includes hover contrast styling for both themes', () => {
+    const { container } = render(<Leaderboard contributors={contributors} />);
+
+    expect(container.innerHTML).toContain('dark:hover');
+  });
+});