附录 2:Testing Library 组件测试基础

The more your tests resemble the way your software is used, the more confidence they can give you.

import { render } from '@testing-library/react'

test('should show h1 title', () => {
  // given
  const comp = render(<App />)

  // when
  const result = comp.getByTestId('title').textContent

  // then
  expect(result).toBe('练功房前端脚手架')
})

Query 查找元素

getByLabelText
getByPlaceholderText
getByText
getByDisplayValue

getByAltText
getByTitle
getByRole

getByTestId

测试组件的交互行为

import { render } from '@testing-library/react'
import userEvent from '@testing-library/user-event'

test('should calculate result by input number', () => {
  const comp = render(<App />)

  userEvent.type(comp.getByTestId('input-number'), '15')

  expect(wrapper.getByTestId('number-result').textContent).toBe('FizzBuzz')
})

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