react-native-testing

import { render, screen, fireEvent } from '@testing-library/react-native';
import { Button } from './Button';
 
describe('Button', () => {
  it('calls onPress when pressed', () => {
    const onPress = jest.fn();
    render(<Button title="Click" onPress={onPress} />);
 
    fireEvent.press(screen.getByText('Click'));
 
    expect(onPress).toHaveBeenCalled();
  });
});

import { renderHook, act } from '@testing-library/react-native';
import { useCounter } from './useCounter';
 
describe('useCounter', () => {
  it('increments count', () => {
    const { result } = renderHook(() => useCounter());
 
    act(() => result.current.increment());
 
    expect(result.current.count).toBe(1);
  });
});

// Mock native module
jest.mock('@react-native-async-storage/async-storage', () => ({
  setItem: jest.fn(),
  getItem: jest.fn(),
}));
 
// Mock API
jest.mock('./api', () => ({
  fetchUser: jest.fn().mockResolvedValue({ id: '1', name: 'Test' }),
}));

describe('Login', () => {
  beforeAll(async () => {
    await device.launchApp();
  });
 
  it('should login successfully', async () => {
    await element(by.id('email')).typeText('test@example.com');
    await element(by.id('password')).typeText('password');
    await element(by.id('login-btn')).tap();
 
    await expect(element(by.id('home'))).toBeVisible();
  });
});

// ProductCard.test.tsx
import { render, screen, fireEvent } from '@testing-library/react-native';
import { ProductCard } from './ProductCard';
 
const mockProduct = {
  id: '1',
  title: 'Test Product',
  price: 99.99,
};
 
describe('ProductCard', () => {
  it('renders product info', () => {
    render(<ProductCard {...mockProduct} onPress={jest.fn()} />);
 
    expect(screen.getByText('Test Product')).toBeOnTheScreen();
    expect(screen.getByText('$99.99')).toBeOnTheScreen();
  });
 
  it('handles press', () => {
    const onPress = jest.fn();
    render(<ProductCard {...mockProduct} onPress={onPress} />);
 
    fireEvent.press(screen.getByRole('button'));
 
    expect(onPress).toHaveBeenCalledWith('1');
  });
});

Skill("react-native-testing")