mock一般指在测试过程中,对于某些不容易构造或者不容易获取的对象,用一个虚拟的对象来创建以便测试的测试方法 广义的讲,以上的 spy 和 stub 等,以及一些对模块的模拟,对 ajax 返回值的模拟、对 timer 的模拟,都叫做 mock 。 测试覆盖率(code coverage) 用于统计测试用例对代码的测试情况,生成相应的报表,
// Reset the module registry before running each individual test// resetModules: false,// Automatically restore mock state between every test// restoreMocks: false,// The root directory that Jest should scan for tests and modules within// rootDir...
Testing: import Reactfrom'react'import { render, fireEvent, waitFor }from'@testing-library/react'import { loadGreeting as mockLoadGreeting } from '../extra/api'import'@testing-library/jest-dom/extend-expect'import { GreetingLoader }from'../extra/greeting-loader-01-mocking'//mock all the expo...
animals: jest.fn(()=>{return{then: (callbacka)=> act(() =>callback(doggs)), } }), } exportdefaultmock Component test: import React from 'react'import { render, fireEvent } from'@testing-library/react'import pet, { ANIMALS, _breeds, _dogs } from'@api/pet'afterEach(()=>{ jest...
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此外,对外部依赖采取mock策略,同样是某种程度上的“关注内部实现”,因为mock的失败同样将导致测试的失败,而非真正业务场景的失败。对待mock的态度,我认为是谨慎使用,但本文未做展开。肖鹏有篇文章Mock的七宗罪对此展开了详细描述,我还没细看,这里只能先分享给读者。
import { render, screen } from '@testing-library/react'; import userEvent from '@testing-library/user-event'; import App from './App'; jest.mock('axios'); describe('App', () => { test('fetches stories from an API and displays them', async () => { ...
import '@testing-library/jest-dom' import * as React from 'react' // import API mocking utilities from Mock Service Worker. import {rest} from 'msw' import {setupServer} from 'msw/node' // import testing utilities import {render, fireEvent, screen} from '@testing-library/react' import ...
另外还有导出类型检查的Flow“魔法”,用来校验mock模块的导出类型是否与源模块一致: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 type Check<_X,Y:_X,X:Y=_X>=null;(null:Check<FeatureFlagsShimType,FeatureFlagsType>); ES Lint负责检查语法错误及约定编码风格错误,例如: ...
首先为了保证单元测试的速度和稳定性,像 API 调用这种不确定性的依赖我们一定是要 mock 掉的。经过仔细总结,我认为这一层主要的测试内容有五点: 是否使用正确的参数(通常是从 action payload 或 redux 中来),调用了正确的 API 对于mock 的 API 返回,是否保存了正确的数据(通常是通过 action 保存到 redux 中去...