grid是进行分布式测试的工具,由一个hub主节点和若干个node代理节点组成
1.下载Selenium Standalone Server
下载地址:https://www.seleniumhq.org/download/
2.启动hub和节点
#hub默认端口是4444,node默认端口是5555
java -jar selenium-server-standalone-3.141.59.jar -role hub
#本机注册节点
java -jar selenium-server-standalone-3.141.59.jar -role node
#本机指定端口注册节点
java -jar selenium-server-standalone-3.141.59.jar -role node -port 5556
#远程机器注册节点
java -jar selenium-server-standalone-3.141.59.jar -role node -port 5557 -hub http://192.168.63.143:4444/grid/register
节点注册地址: http://192.168.63.143:4444/grid/register/
hub管理地址: http://192.168.63.143:4444/grid/console
3.查看后台http://192.168.63.143:4444/grid/console
4.实例1:编写自动化测试脚本
from selenium.webdriver import Remote
driver = Remote(command_executor="http://127.0.0.1:4444/wd/hub",
desired_capabilities={'platform':'ANY',
'browserName':'chrome',
'version':'',
'javascriptEnabled':True})
driver.get("http://www.baidu.com")
driver.find_element_by_xpath("//input[@id='kw' and @class='s_ipt']").send_keys("hello")
driver.find_element_by_xpath("//input[@value='百度一下' and @id='su']").click()
driver.quit()
修改脚本以在不同的浏览器上运行
from selenium.webdriver import Remote
from time import sleep
lists={'http://192.168.63.143:4444/wd/hub':'chrome',
'http://192.168.63.143:5555/wd/hub':'firefox'}
for host,browser in lists.items():
print(host,browser)
driver = Remote(command_executor=host,
desired_capabilities={'browserName': browser,
'platform': 'ANY',
'version':'',
'javascriptEnabled':True
}
)
driver.get("http://www.baidu.com")
driver.find_element_by_xpath("//input[@id='kw' and @class='s_ipt']").send_keys(browser)
driver.find_element_by_xpath("//input[@value='百度一下' and @id='su']").click()
sleep(3)
result_text = driver.find_element_by_xpath("//span[@class='nums_text']").text
assert "百度为您找到相关结果约" in result_text
driver.quit()
5.浏览器内核
浏览器最重要或者最核心的部分是Rendering Engine,即渲染引擎,习惯成为渲染引擎。所谓的浏览器内核,决定了浏览器如何显示网页的内容以及页面的格式信息。