java -jar selenium-server-standalone-3.5.0.jar -role hub

java -jar selenium-server-standalone-3.5.0.jar -role node -port 5555 -hub http://localhost:4444/grid/register

java -jar selenium-server-standalone-3.5.0.jar -role node -port 5556 -hub http://localhost:4444/grid/register
java -jar selenium-server-standalone-3.5.0.jar -role node -port 5557 -hub http://localhost:4444/grid/register

cd /d D:grid
start java -jar selenium-server-standalone-3.5.0.jar -role hub
start java -jar selenium-server-standalone-3.5.0.jar -role node -port 5555 -hub http://localhost:4444/grid/register
start java -jar selenium-server-standalone-3.5.0.jar -role node -port 5556 -hub http://localhost:4444/grid/register
start java -jar selenium-server-standalone-3.5.0.jar -role node -port 5557 -hub http://localhost:4444/grid/register

d:grid>java -jar selenium-server-standalone-3.5.0.jar --help
Usage: <main class> [options]
  Options:
    --version, -version
       Displays the version and exits.
       Default: false
    -browserTimeout
       <Integer> in seconds : number of seconds a browser session is allowed to
       hang while a WebDriver command is running (example: driver.get(url)). If the
       timeout is reached while a WebDriver command is still processing, the session
       will quit. Minimum value is 60. An unspecified, zero, or negative value means
       wait indefinitely.
       Default: 0
    -debug
       <Boolean> : enables LogLevel.FINE.
       Default: false
    -enablePassThrough
       <Boolean>: Whether or not to use the experimental passthrough mode.
       Defaults to true.
       Default: true
    -jettyThreads, -jettyMaxThreads
       <Integer> : max number of threads for Jetty. An unspecified, zero, or
       negative value means the Jetty default value (200) will be used.
    -log
       <String> filename : the filename to use for logging. If omitted, will log
       to STDOUT
    -port
       <Integer> : the port number the server will use.
       Default: 4444
    -role
       <String> options are [hub], [node], or [standalone].
       Default: standalone
    -timeout, -sessionTimeout
       <Integer> in seconds : Specifies the timeout before the server
       automatically kills a session that hasn't had any activity in the last X seconds. The
       test slot will then be released for another test to use. This is typically
       used to take care of client crashes. For grid hub/node roles, cleanUpCycle
       must also be set.
       Default: 1800

# coding:utf-8


from selenium.webdriver import Remote
import time

# 定义node_hub与浏览器对应关系
nodes = {
    'http://127.0.0.1:5555/wd/hub': 'chrome',
    'http://127.0.0.1:5556/wd/hub': 'internet explorer',
    'http://127.0.0.1:5557/wd/hub': 'firefox'
}

# 通过不同的浏览器执行测试脚本
for host, browser in nodes.items():
    print(host, browser)
    # 调用remote方法
    driver = Remote(command_executor=host,
                    desired_capabilities={'platform': 'ANY', 'browserName': browser, 'version': '', 'javascriptEnabled': True})

    # 打开百度首页并搜索词语，最后判断搜索跳转页面标题是否含有搜索词
    wd = 'lovesoo'
    driver.get('https://www.baidu.com')
    driver.find_element_by_id("kw").send_keys(wd)
    driver.find_element_by_id("su").click()
    time.sleep(1)
    assert wd in driver.title, '{0} not in {1}'.format(wd, driver.title.encode('utf-8'))
    driver.quit()

('http://127.0.0.1:5555/wd/hub', 'chrome')
('http://127.0.0.1:5557/wd/hub', 'firefox')
('http://127.0.0.1:5556/wd/hub', 'internet explorer')