Playwright 1.28 新功能总结 is becoming increasingly widespread in frontend development. This article dives into its core principles and best practices from real projects.

Basic Usage

Let's start with the basic implementation:

import { render, screen, waitFor } from '@testing-library/react'
import userEvent from '@testing-library/user-event'
import { LoginForm } from './LoginForm'

describe('LoginForm', () => {
  it('提交有效的登录表单', async () => {
    const onSubmit = jest.fn()
    render(<LoginForm onSubmit={onSubmit} />)
    await userEvent.type(screen.getByLabelText(/邮箱/), 'user@example.com')
    await userEvent.type(screen.getByLabelText(/密码/), 'password123')
    await userEvent.click(screen.getByRole('button', { name: /登录/ }))
    await waitFor(() => {
      expect(onSubmit).toHaveBeenCalledWith({
        email: 'user@example.com', password: 'password123'
      })
    })
  })
})

This code demonstrates the basic usage. In real projects, you also need to consider error handling and edge cases.

Advanced Usage

Building on this foundation, we can further optimize:

import { test, expect } from '@playwright/test'

test.describe('用户登录流程', () => {
  test('成功登录跳转到首页', async ({ page }) => {
    await page.goto('/login')
    await page.fill('[data-testid="email"]', 'admin@example.com')
    await page.fill('[data-testid="password"]', 'admin123')
    await page.click('[data-testid="submit-btn"]')
    await expect(page).toHaveURL('/dashboard')
    await expect(page.locator('.welcome')).toContainText('欢迎回来')
  })
})

This pattern is very practical in large projects and can significantly reduce maintenance costs.

Practical Cases

Usage in real projects tends to be more complex:

import { render, screen, waitFor } from '@testing-library/react'
import userEvent from '@testing-library/user-event'
import { LoginForm } from './LoginForm'

describe('LoginForm', () => {
  it('提交有效的登录表单', async () => {
    const onSubmit = jest.fn()
    render(<LoginForm onSubmit={onSubmit} />)
    await userEvent.type(screen.getByLabelText(/邮箱/), 'user@example.com')
    await userEvent.type(screen.getByLabelText(/密码/), 'password123')
    await userEvent.click(screen.getByRole('button', { name: /登录/ }))
    await waitFor(() => {
      expect(onSubmit).toHaveBeenCalledWith({
        email: 'user@example.com', password: 'password123'
      })
    })
  })
})

Through this approach, both the testability and scalability of the code are improved.

Performance Optimization

Here is a complete example:

import { test, expect } from '@playwright/test'

test.describe('用户登录流程', () => {
  test('成功登录跳转到首页', async ({ page }) => {
    await page.goto('/login')
    await page.fill('[data-testid="email"]', 'admin@example.com')
    await page.fill('[data-testid="password"]', 'admin123')
    await page.click('[data-testid="submit-btn"]')
    await expect(page).toHaveURL('/dashboard')
    await expect(page.locator('.welcome')).toContainText('欢迎回来')
  })
})

Pay attention to boundary condition handling, which is critical in production.

Summary

• Code examples are for reference only and need to be adjusted according to your business scenario
• Playwright 1.28 新功能总结 is not a silver bullet; choose based on your project scale and tech stack
• Understanding underlying principles is more important than memorizing APIs