portfolio/src/widgets/Navigation/ui/SidebarNav.test.tsx

import { describe, it, expect, vi, beforeEach } from 'vitest';
import { render, screen } from '@testing-library/react';
import { SidebarNav } from './SidebarNav';
import type { NavItem } from '../model/types';

const ITEMS: NavItem[] = [
  { id: 'bio', label: 'Bio', number: '01' },
  { id: 'work', label: 'Work', number: '02' },
];

beforeEach(() => {
  global.IntersectionObserver = vi.fn(function () {
    return {
      observe: vi.fn(),
      disconnect: vi.fn(),
      unobserve: vi.fn(),
    };
  }) as unknown as typeof IntersectionObserver;
});

describe('SidebarNav', () => {
  describe('rendering', () => {
    it('renders a nav element', () => {
      render(<SidebarNav items={ITEMS} />);
      expect(screen.getByRole('navigation')).toBeInTheDocument();
    });

    it('renders "Index" heading', () => {
      render(<SidebarNav items={ITEMS} />);
      expect(screen.getByText('Index')).toBeInTheDocument();
    });

    it('renders "Digital Monograph" subtitle', () => {
      render(<SidebarNav items={ITEMS} />);
      expect(screen.getByText('Digital Monograph')).toBeInTheDocument();
    });

    it('renders each item label and number', () => {
      render(<SidebarNav items={ITEMS} />);
      expect(screen.getByText('Bio')).toBeInTheDocument();
      expect(screen.getByText('01')).toBeInTheDocument();
      expect(screen.getByText('Work')).toBeInTheDocument();
      expect(screen.getByText('02')).toBeInTheDocument();
    });

    it('renders "Quick Links" section', () => {
      render(<SidebarNav items={ITEMS} />);
      expect(screen.getByText('Quick Links')).toBeInTheDocument();
    });

    it('renders Email quick link', () => {
      render(<SidebarNav items={ITEMS} />);
      expect(screen.getByRole('link', { name: 'Email' })).toBeInTheDocument();
    });

    it('renders a button for each item', () => {
      render(<SidebarNav items={ITEMS} />);
      const buttons = screen.getAllByRole('button');
      expect(buttons.length).toBeGreaterThanOrEqual(ITEMS.length);
    });
  });
});