你可能已经注意到我们package.json中的测试脚本提到了一个文件wdio.conf.js。这就是WebdriverIO配置文件，它控制了我们测试套件的大部分方面。

wdio.conf.js:

const os = require('os')
const path = require('path')
const { spawn, spawnSync } = require('child_process')

// keep track of the `tauri-driver` child process
let tauriDriver

exports.config = {
  specs: ['./test/specs/**/*.js'],
  maxInstances: 1,
  capabilities: [
    {
      maxInstances: 1,
      'tauri:options': {
        application: '../../target/release/hello-tauri-webdriver',
      },
    },
  ],
  reporters: ['spec'],
  framework: 'mocha',
  mochaOpts: {
    ui: 'bdd',
    timeout: 60000,
  },

  // ensure the rust project is built since we expect this binary to exist for the webdriver sessions
  onPrepare: () => spawnSync('cargo', ['build', '--release']),

  // ensure we are running `tauri-driver` before the session starts so that we can proxy the webdriver requests
  beforeSession: () =>
    (tauriDriver = spawn(
      path.resolve(os.homedir(), '.cargo', 'bin', 'tauri-driver'),
      [],
      { stdio: [null, process.stdout, process.stderr] }
    )),

  // clean up the `tauri-driver` process we spawned at the start of the session
  afterSession: () => tauriDriver.kill(),
}

如果你对`exports.config`对象上的属性感兴趣，我建议阅读文档。对于非WDIO特定的项目，有注释解释为什么我们在onPrepare​、​beforeSession​和​afterSession​中运行命令。我们还将我们的规范设置为​"./test/specs/**/*.js"​，所以让我们现在创建一个规范文件。