Mobile App Testing

Mobile App Testing

Implement comprehensive testing strategies for mobile applications.

Testing Pyramid

Level	Tools	Coverage
Unit	Jest, XCTest, JUnit	70%
Integration	Detox, Espresso	20%
E2E	Appium, Detox	10%

React Native (Jest + Detox)

// Unit test
describe('CartService', () => {
  it('calculates total correctly', () => {
    const cart = new CartService();
    cart.addItem({ price: 10, quantity: 2 });
    expect(cart.getTotal()).toBe(20);
  });
});

// E2E test (Detox)
describe('Login flow', () => {
  beforeEach(async () => {
    await device.reloadReactNative();
  });

  it('should login successfully', async () => {
    await element(by.id('email-input')).typeText('user@example.com');
    await element(by.id('password-input')).typeText('password123');
    await element(by.id('login-button')).tap();
    await expect(element(by.id('dashboard'))).toBeVisible();
  });
});

iOS (XCTest)

func testLoginSuccess() {
    let app = XCUIApplication()
    app.launch()