selenium grid2 初探 - 51Testing软件测试论坛

简单说grid是一个分布式的应用,通过注册不同的节点(hub),提高用例执行效率。

##4 Starting Selenium-Grid 接下来如何启动Selenium-Grid并注册节点呢？windows下我用的批处理实现，以下未经说明，代码均为批处理。

@echo off
echo "now start selenuim grid hub server"
c:/apps/jdk1.7.0_55/bin/java -jar c:/apps/selenium-server/selenium-server.jar -role hub -port 4200
PAUSE

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@echo off
echo "now register selenuim grid node server"
c:/apps/jdk1.7.0_55/bin/java -jar c:/apps/selenium-server/selenium-server.jar -role node -hub http://127.0.0.1:4200/grid/register -port 5555
PAUSE
```
###4.3 register Grid node with self-settings
```
@echo off
echo "now register selenuim grid node Chrome browser server"
c:/apps/jdk1.7.0_55/bin/java -jar c:/apps/selenium-server/selenium-server.jar -role node -hub http://127.0.0.1:4200/grid/register -port 5557 -Dwebdriver.chrome.driver="c:/apps/selenium-server/chromedriver.exe"
PAUSE
```
**Dwebdriver.chrome.driver** 参数允许你指定对应的chrome或者IE browser驱动。
###4.4 check and view grid status
you can visit this url to check grid status `http://localhost:4200/grid/console`
##5 总结
这里只是完成了基本的Grid hub启动和注册，接下来看如何结合selenium实现具体需求。
附上一个用python写的启动脚本
```
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Date : 2016-03-03 16:48:31
# @Author : Jeff.Sui
# @Link : http://jeffsui.github.io
# @Version : $Id$
import os
from subprocess import Popen
import sys
import urllib2
import printTm
DEBUG = True
hubStartStr="c:/apps/jdk1.7.0_55/bin/java -jar c:/apps/selenium-server/selenium-server.jar -role hub -port 4200"
html=''
try:
response=urllib2.urlopen('http://127.0.0.1:4200/wd/hub')
html=response.read()
if 'Browsers' in html:
printTm('already running')
exit
else:
Popen(hubStartStr,shell=True)
exit
except urllib2.URLError as e:
Popen(hubStartStr,shell=True)
exit
except urllib2.HTTPError:
printTm('HTTPError')
exit
```

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