Selenium_Grid
0 likes175 views
Selenium Grid allows test scenarios to be executed remotely on virtual machines. It follows a hub and node architecture where the hub distributes tests to multiple nodes. To set up a grid, one machine is configured as the hub and other machines are configured as nodes by registering with the hub. Test scripts can then use the RemoteWebDriver to run tests on the nodes via the hub.
Selenium_Grid
- 2. Pointsto be remembered: • It is a component of the Selenium which is use to execute the scenarios remotely. Note:What is meant by Remotely? To execute the scenarios on the machine/system which is not physically present(known as Virtual machine). • Grid follows two concept-- Hub(Master) and Node(slave) Note:We can create one Hub and multiple nodes. Pre-requisites: 1. We should have drivers and browsers on local and remote systems. 2. we need to make our local system as Hub and register all the VM in Hub as a node. 3. Write test case then execute on remote systems.
- 3. Basic Terminology Of SeleniumGrid: • Hub: Hub is the central point to the entire GRID Architecturewhich receives all requests.There is only one hub in the selenium grid. Hub distributes the test cases across each node. • Node: There can be multiple nodes in Grid. Tests will run in nodes. Each node communicateswith the Hub and performs test assigned to it.
- 4. Steps to convert any device(system) as HUB. 1. Install the standalone application in device and Navigate to the location where standalone jar is installed and type cmd in file path section and click enter. 2. use this command to make local machine as hub: java -jar selenium-server- standalone-3.141.59.jar -role hub • check hub is running using below url: http://localhost:4444/grid/console Note: If we do not specify the port then selenium grid server will up at 4444 and node would up at 5555 by default. To specify the port we can use –port with above command. java -jar selenium-server-standalone- 3.141.59.jar -role hub –port <port number>
- 5. Register node with the hub server: To convert any machine as a node we haveto downloadthe stand aloneselenium jar to that machine and need to navigateto that location. Then open the cmd and use below command e.g. java -Dwebdriver.chrome.driver=C:Driverschromedriver_win32chromedriver.exe"-jar selenium- server-standalone-3.141.59.jar -role node -hub http://localhost:4444/grid/register Note: we can mention the port no. also in above command like –port <port number> or else node would be registerat default port 5555. We can use below command also in case above one is not working. java - Dwebdriver.chrome.driver="C:Usersmithilesh.singhDownloadschromedriver_win32chromedrive r.exe" -jar selenium-server-standalone-3.141.59.jar -port 4460 -role node -hub http://localhost:4444/grid/register -browser "browserName=chrome,platform=WINDOWS, maxInstances=10"
- 6. Implement code to execute scenarioson node(Registered with hub): As in the example,you have to use RemoteWebDriverif you are using the GRID and you have to provide capabilities to the browser.You have to set the browser and platformas below. String nodeURL="http://192.168.13.1:5555/wd/hub"; DesiredCapabilities cap = DesiredCapabilities.chrome(); cap.setBrowserName("chrome"); cap.setplatform(Platform.WIND10); System.setProperty("webdriver.chrome.driver","C://Drive rs//chromedriver_win32//chromedriver.exe"); driver=new RemoteWebDriver(new URL(nodeURL), cap); Note: Restother things will be same in the framwork.