CodeRabbit Generated Unit Tests: Add comprehensive Jest/RTL tests for App component in src/App.test.js

src/App.test.js

@@ -1,8 +1,90 @@
+/**
+ * Tests for App component
+ *
+ * Testing framework: Jest + React Testing Library
+ * - Runner: Jest
+ * - DOM utilities: @testing-library/react
+ * - Matchers: @testing-library/jest-dom
+ *
+ * These tests focus on the current behavior and text content of App,
+ * including the link, image, texts, and specific span content.
+ */
+
+import React from 'react'
 import{render, screen } from '@testing-library/react'
+// If the project has setupTests to extend expect with jest-dom, the following import is not needed.
+// import '@testing-library/jest-dom'
 import App from './App'
 
-test('renders learn react link', () =>{
- render(<App />);
- const linkElement = screen.getByText(/learn react/i);
- expect(linkElement).toBeInTheDocument();
+describe('App component', () =>{
+ test('renders without crashing', () =>{
+ const{container } = render(<App />);
+ expect(container).toBeTruthy();
+ });
+
+ test('displays the GitHub Codespaces heart React headline', () =>{
+ render(<App />);
+ // Using getByText with exact string including the heart symbol
+ expect(
+ screen.getByText(/GitHub Codespaces/i)
+ ).toBeInTheDocument();
+
+ // Verify the heart exists as a separate element with class "heart"
+ const heart = screen.getByText('♥️');
+ expect(heart).toBeInTheDocument();
+ expect(heart).toHaveClass('heart');
+ });
+
+ test('shows the edit instructions line', () =>{
+ render(<App />);
+ expect(
+ screen.getByText(/Edit\s+src\/App\.js\s+and save to reload\./i)
+ ).toBeInTheDocument();
+ });
+
+ test('renders the logo image with correct alt text and source', () =>{
+ render(<App />);
+ const img = screen.getByAltText(/logo/i);
+ expect(img).toBeInTheDocument();
+ // For environments that inline assets, src may be transformed; use partial match
+ expect(img).toHaveClass('App-logo');
+ expect(img.getAttribute('src') || '').toContain('Octocat.png');
+ });
+
+ test('renders the greeting span text exactly as present', () =>{
+ render(<App />);
+ // Validate the exact string including the typos to lock current behavior
+ expect(
+ screen.getByText('hello, whats yoru name? hhh')
+ ).toBeInTheDocument();
+ });
+
+ test('renders the Learn React link with secure target attributes', () =>{
+ render(<App />);
+ const link = screen.getByRole('link',{name: /learn react/i });
+ expect(link).toBeInTheDocument();
+ expect(link).toHaveAttribute('href', 'https://reactjs.org');
+ expect(link).toHaveAttribute('target', '_blank');
+ // Security best-practice attributes when opening new tabs
+ expect(link).toHaveAttribute('rel');
+ expect(link.getAttribute('rel')).toMatch(/noopener/);
+ expect(link.getAttribute('rel')).toMatch(/noreferrer/);
+ expect(link).toHaveClass('App-link');
+ });
+
+ test('has main app structure and header', () =>{
+ const{container } = render(<App />);
+ // Basic structure checks by class names present in component
+ const root = container.querySelector('.App');
+ const header = container.querySelector('.App-header');
+ expect(root).toBeInTheDocument();
+ expect(header).toBeInTheDocument();
+ });
+
+ // Edge case: Rendering in a constrained environment (no specific props)
+ // Since App has no props, this validates it doesn't rely on external state.
+ test('does not require props to render', () =>{
+ const{container } = render(React.createElement(App, null));
+ expect(container.firstChild).toBeTruthy();
+ });
 });