# （一）初始化环境




MacOS

* nodejs版本: 6.2.0
* selenium-webdriver版本: 3.4.0
* chrome版本: 版本 59.0.3071.86（正式版本）64位
* chrome driver版本: ChromeDriver 2.30.477690

Windows

TODO

### 安装nodejs
TODO

### 安装selenium webdriver

```
mkdir se
cd se
cnpm install selenium-webdriver

[selenium-webdriver@*] installed at node_modules/.npminstall/selenium-webdriver/3.4.0/selenium-webdriver (20 packages, use 4s, speed 447.48kB/s, json 34.34kB, tarball 1.54MB)

All packages installed (20 packages installed from npm registry, use 4s, speed 446kB/s, json 22(34.34kB), tarball 1.54MB)
```

### 安装chrome driver

chrome driver建议通过科学上网的方式下载。

[下载地址](https://sites.google.com/a/chromium.org/chromedriver/downloads)

**下载完成后请将chromedriver.exe(windows)放到[系统PATH](http://jingyan.baidu.com/article/ed2a5d1f3655ca09f6be17a4.html)中**

验证chrome driver是否正确安装，请在命令行中输入

```
chromedriver -h
Usage: chromedriver [OPTIONS]

Options
  --port=PORT                     port to listen on
  --adb-port=PORT                 adb server port
  --log-path=FILE                 write server log to file instead of stderr, increases log level to INFO
  --verbose                       log verbosely
  --version                       print the version number and exit
  --silent                        log nothing
  --url-base                      base URL path prefix for commands, e.g. wd/url
  --port-server                   address of server to contact for reserving a port
  --whitelisted-ips               comma-separated whitelist of remote IPv4 addresses which are allowed to connect to ChromeDriver

```

如能看到上述结果则证明安装成功


### 简单的环境验证测试

新建文件start.js，并键入下面的内容。

```javascript
// start.js
var webdriver = require('selenium-webdriver');

var driver = new webdriver.Builder().forBrowser('chrome').build();

driver.get('http://itest.info');

console.log('quit driver');
driver.quit();

```

在命令行中运行

```
node strat.js
```

预期结果: chrome打开并跳转到[itest.info](http://itest.info)首页，然后chrome正常退出。




原始封面

![课程图片](https://images.unsplash.com/photo-1440610049442-a5101a2204ba?w=300)