Cypress TypeError: Cannot read properties of undefined (reading 'uid')

Question

我有一个使用 Cucumber 预处理器支持 TypeScript 的 Cypress 项目，突然它开始抛出以下异常：

 TypeError: Cannot read properties of undefined (reading 'uid')

有时当我切换到不同的工作区时它会工作，但当我打开 Cypress runner 本身时甚至在 Jenkins 中执行时也会再次出现此错误。

赛普拉斯亚军： (v8.4.0)

Jenkins 控制台： (v8.7.0)

The function exported by the plugins file threw an error.

We invoked the function exported by `C:\Jenkins\workspace\ABC\cypress\plugins\index.js`, but it threw an error.

 TypeError: Cannot read properties of undefined (reading 'uid')
    at Object.statSync (C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Cypress\Cache.7.0\Cypress\resources\app\packages\server\node_modules\graceful-fs\polyfills.js:303:17)
    at isDirectory (C:\Jenkins\workspace\ABC\ui\node_modules\resolve\lib\sync.js:22:23)
    at loadNodeModulesSync (C:\Jenkins\workspace\ABC\ui\node_modules\resolve\lib\sync.js:191:17)
    at Function.resolveSync [as sync] (C:\Jenkins\workspace\ABC\ui\node_modules\resolve\lib\sync.js:98:17)
    at module.exports (C:\Jenkins\workspace\ABC\ui\cypress\plugins\index.js:15:25)
    at C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Cypress\Cache.7.0\Cypress\resources\app\packages\server\lib\plugins\child\run_plugins.js:90:12
    at tryCatcher (C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Cypress\Cache.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\util.js:16:23)
    at Function.Promise.attempt.Promise.try (C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Cypress\Cache.7.0\Cypress\resources\app\packages\server\node_modules\bluebird\js\release\method.js:39:29)
    at load (C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Cypress\Cache.7.0\Cypress\resources\app\packages\server\lib\plugins\child\run_plugins.js:87:7)
    at EventEmitter.<anonymous> (C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Cypress\Cache.7.0\Cypress\resources\app\packages\server\lib\plugins\child\run_plugins.js:198:5)
    at EventEmitter.emit (events.js:376:20)
    at process.<anonymous> (C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Cypress\Cache.7.0\Cypress\resources\app\packages\server\lib\plugins\util.js:19:22)
    at process.emit (events.js:376:20)
    at process.emit (C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Cypress\Cache.7.0\Cypress\resources\app\packages\server\node_modules\source-map-support\source-map-support.js:495:21)
    at emit (internal/child_process.js:910:12)
    at processTicksAndRejections (internal/process/task_queues.js:83:21)
error Command failed with exit code 1.

plugins/index.js

const resolve = require('resolve');
const cucumber = require("cypress-cucumber-preprocessor").default;
const cypressBrowserify = require("@cypress/browserify-preprocessor");
const mysql = require('mysql2')
const db = require('../../cypress.json')
var mssql = require('mssql');
const path = require('path');
const fs = require('fs-extra');
const allureWriter = require('@shelex/cypress-allure-plugin/writer');

module.exports = (on, config) => {
  
  const options = {
    ...cypressBrowserify.defaultOptions,
    typescript: resolve.sync('typescript', {project:  config.projectRoot}),
  };  
  
  on("file:preprocessor", cucumber(options));

  on('task', {
    'createMySQLConnection'(query) {
      var value = mysqlDB(query)
      return value
    }
  });

  function mysqlDB(query) {
    var dbenv = config.env.configFile
    var connection="";
    if(dbenv=="qa"){
      connection = mysql.createConnection(db.qa)
    }
    else if(dbenv=="stg"){
      connection = mysql.createConnection(db.stg)
    }
    else if(dbenv=="stg2"){
      connection = mysql.createConnection(db.stg2)
    }
    connection.connect()
    return new Promise((resolve, reject) => {
      connection.query(query, (error, results) => {
        if (error) {
          return reject(error)
        }
        connection.end()
        return resolve(results)
  
      })
    })
  }

  on('task', {
    'createMSSQLConnection'(query) {
      return mssqlDB(query)
    }
  });


 async function mssqlDB(query){
   const connection = await mssql.connect(db.env);
   var sqlServerRequest = new mssql.Request(connection);
   return new Promise((resolve, reject) => {
    sqlServerRequest.query(query, (error, recordset) => {
      mssql.close(); 
      if(error){
      reject (error)
      }
      else{
        resolve (recordset)
      }
    }) 
  })
 };
 
  allureWriter(on, config);
  const file = config.env.configFile || 'stg2';
  const pathToConfigFile = path.resolve('cypress/config', `${file}.json`);
  return config,fs.readJson(pathToConfigFile);
  
}

support/index.ts

import './commands';
import '@shelex/cypress-allure-plugin/reporter';
import 'cypress-xpath';
import 'cypress-plugin-tab';   

Cypress.on('uncaught:exception', (err, runnable) => {
  cy.log(`Uncaught Exception: ${JSON.stringify(err)}`);

  return false;
});

Answer 1

我遇到了同样的问题。无论如何都是奇怪的行为，因为它发生在我尝试在我的本地机器上开始测试时。使用 git 操作工作流程开始测试时没有错误。对我来说，解决方案是来自这里的“aidanhyland”的评论： https://github.com/cypress-io/cypress/issues/19674#issuecomment-1012212527
该问题与您的代码中是否使用“uid”无关。问题在于黄瓜依赖性以及它们是如何解决的。

Answer 2

我已经尝试了很多事情，比如清理缓存、分析 index.js 文件，但下面的一个问题已解决。

从机器上卸载 Cypress 并安装 Cypress 8.5.0 版，一切开始正常工作

npm install cypress@8.5.0

Cypress TypeError: Cannot read properties of undefined (reading 'uid')

Cypress TypeError: Cannot read properties of undefined (reading 'uid')

typescript

automated-tests

cucumber

cypress

cypress-cucumber-preprocessor