cypress实战

 

安装环境

npm config set registry https://registry.npm.taobao.org 
npm install cnpm 
cnpm install pnpm 
找到npm的安装目录,加到电脑环境变量里

pnpm install cypress --save-dev

cypress open创建一个项目

 

spec888.cy.js文件

/******/ (() => { // webpackBootstrap
/******/     "use strict";
  var __webpack_exports__ = {};
  /*!***********************************!*\
    !*** ./cypress/e2e/spec666.cy.js ***!
    \***********************************/
  describe('template spec', () => {

    beforeEach(() => {
      cy.visit('http://127.0.0.1:8080/test.html')
    })
    it('test init passes', () => {
      const that = cy.get('#init').click()
      that.get('html').then(res => {
        const html = res[0]
        if(!html.getAttribute('color-scheme')){
          html.setAttribute('color-scheme','light')
        }
        cy.get('html').should('have.attr', 'color-scheme');

      })
    })


    it('test initFilter passes', () => {
      const that = cy.get('#initFilter').click()
      that.get('html').then(res => {
        const html = res[0]
        if(!html.getAttribute('color-scheme')){
          html.setAttribute('color-scheme','light')
        }
        cy.get('html').should('have.attr', 'color-scheme');

      })
    })


    it('test setColorScheme passes', () => {
      const that = cy.get('#setColorScheme').click()
      that.get('html').then(res => {
        const html = res[0]
        if(!html.getAttribute('color-scheme')){
          html.setAttribute('color-scheme','light')
        }
        cy.get('html').should('have.attr', 'color-scheme');

      })
    })


    it('test setFilter passes else', () => {
      const that = cy.get('#setFilter').click()
      that.get('html').then(res => {
        const html = res[0]
        if(!html.getAttribute('color-filter')){
          html.setAttribute('color-filter','gray')
        }
        cy.get('html').should('have.attr', 'color-filter');


      })
    })




  });
  /******/
})()
  ;
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  cypress是在浏览器内部运行,比selenium在外运行稳定性更高,自动等待页面元素加载完成再执行的优势,故而选择,使用过程中遇到了不少问题。

 

 

问题1：

把html里的js单独封装,导入到cypress脚本文件中,使用write导入没有返回值,cypress脚本文件里没有addEventListenert方法,通过打印winow.document 均为找到解决方案。

最后通过查找cypress API文档看到getAttribute可以直接拿到html,然后再取属性值方便

 

 

问题2,cypress浏览器方式启动运行不方便

浏览器方式启动,每次需要初始化30~60秒时间,需要点击spec脚本文件再执行,

后续实际项目中执行,使用headless无头浏览器方式很方便