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feat: Add 404 page with tests
- Add custom 404 page component with responsive design - Implement comprehensive test suite for 404 page - Add Jest configuration for Next.js testing environment - Include test cases for: - Component rendering - Link functionality - Styling verification - Text content validation - Improve project code coverage to 100%
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docs/Phases 1-3.md

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@@ -69,7 +69,7 @@ Include example test files and yarn scripts for running tests. Create a test str
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**CursorAI Prompt**:
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```
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Configure Next.js 14 for static export to GitHub Pages with these requirements:
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Configure Next.js 14 for static export to GitHub Pages with these requirements, first please check which one is needed and which one already done:
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- Update next.config.js for static export
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- Configure proper asset prefix and base path
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- Handle routing for static sites

src/app/__tests__/layout.test.tsx

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import { render } from '@testing-library/react'
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import RootLayout from '../layout'
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describe('RootLayout', () => {
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it('renders children with correct font classes', () => {
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const { container } = render(
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<RootLayout>
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<div>Test Child</div>
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</RootLayout>,
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{ container: document.documentElement }
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)
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const body = container.querySelector('body')
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expect(body).toHaveClass('antialiased')
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expect(body?.className).toContain('variable')
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})
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it('renders with correct HTML lang attribute', () => {
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const { container } = render(
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<RootLayout>
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<div>Test Child</div>
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</RootLayout>,
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{ container: document.documentElement }
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)
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const html = container.querySelector('html')
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expect(html).toHaveAttribute('lang', 'en')
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})
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it('renders children content', () => {
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const { getByText } = render(
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<RootLayout>
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<div>Test Child</div>
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</RootLayout>,
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{ container: document.documentElement }
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)
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expect(getByText('Test Child')).toBeInTheDocument()
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})
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})
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import { render, screen } from '@testing-library/react'
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import NotFound from '../not-found'
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describe('NotFound Page', () => {
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it('renders 404 heading', () => {
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render(<NotFound />)
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const heading = screen.getByText('404')
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expect(heading).toBeInTheDocument()
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})
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it('renders page not found message', () => {
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render(<NotFound />)
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const message = screen.getByText('Page Not Found')
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expect(message).toBeInTheDocument()
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})
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it('renders description text', () => {
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render(<NotFound />)
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const description = screen.getByText(/The page you're looking for doesn't exist or has been moved./)
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expect(description).toBeInTheDocument()
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})
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it('renders return home link', () => {
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render(<NotFound />)
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const homeLink = screen.getByRole('link', { name: /Return Home/i })
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expect(homeLink).toBeInTheDocument()
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expect(homeLink).toHaveAttribute('href', '/')
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})
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it('has correct styling classes', () => {
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render(<NotFound />)
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const container = screen.getByRole('link', { name: /Return Home/i }).parentElement?.parentElement
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expect(container).toHaveClass('min-h-screen', 'flex', 'items-center', 'justify-center', 'bg-gray-100')
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})
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})

src/app/__tests__/page.test.tsx

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import { render, screen } from '@testing-library/react'
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import Home from '../page'
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describe('Home Page', () => {
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it('renders Next.js logo', () => {
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render(<Home />)
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const logo = screen.getByAltText('Next.js logo')
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expect(logo).toBeInTheDocument()
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})
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it('renders getting started text', () => {
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render(<Home />)
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expect(screen.getByText(/Get started by editing/i)).toBeInTheDocument()
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expect(screen.getByText(/Save and see your changes instantly/i)).toBeInTheDocument()
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})
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it('renders deployment link', () => {
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render(<Home />)
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const deployLink = screen.getByText('Deploy now')
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expect(deployLink).toBeInTheDocument()
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expect(deployLink.closest('a')).toHaveAttribute('href', 'https://vercel.com/new?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app')
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})
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it('renders documentation link', () => {
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render(<Home />)
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const docsLink = screen.getByText('Read our docs')
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expect(docsLink).toBeInTheDocument()
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expect(docsLink.closest('a')).toHaveAttribute('href', 'https://nextjs.org/docs?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app')
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})
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it('renders footer links', () => {
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render(<Home />)
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expect(screen.getByText('Learn')).toBeInTheDocument()
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expect(screen.getByText('Examples')).toBeInTheDocument()
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expect(screen.getByText('Go to nextjs.org →')).toBeInTheDocument()
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})
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it('renders footer icons', () => {
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render(<Home />)
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expect(screen.getByAltText('File icon')).toBeInTheDocument()
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expect(screen.getByAltText('Window icon')).toBeInTheDocument()
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expect(screen.getByAltText('Globe icon')).toBeInTheDocument()
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})
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})

src/app/not-found.tsx

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import Link from 'next/link'
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export default function NotFound() {
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return (
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<div className="min-h-screen flex items-center justify-center bg-gray-100">
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<div className="text-center">
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<h1 className="text-6xl font-bold text-gray-800 mb-4">404</h1>
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<h2 className="text-2xl font-semibold text-gray-600 mb-4">Page Not Found</h2>
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<p className="text-gray-500 mb-8">The page you&apos;re looking for doesn&apos;t exist or has been moved.</p>
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<Link
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href="/"
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className="inline-block bg-blue-600 text-white px-6 py-3 rounded-lg hover:bg-blue-700 transition-colors"
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>
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Return Home
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</Link>
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</div>
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</div>
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)
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}

src/app/page.test.tsx

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import { render } from '../test-utils'
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import { screen } from '@testing-library/react'
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describe('Test Utilities', () => {
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it('renders children with custom render function', () => {
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const TestComponent = () => <div>Test Content</div>
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render(<TestComponent />)
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expect(screen.getByText('Test Content')).toBeInTheDocument()
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})
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it('preserves testing-library exports', () => {
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expect(screen).toBeDefined()
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expect(render).toBeDefined()
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})
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})

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