I am new to Selenium and I am trying to execute test in remote machine using Selenium Grid and Javascript (in Node Js) I am now able to connect to remote machine from js.
In Java, we use RemoteWebDriver and give Node machine URL. there are plenty of examples in Google
how will we do the same from Javascript. can any one please provide me step by step procedure to Invoke Sample tests in Node Machine from Hub Machine.
Many thanks
Vijay Bhargav
Related
As per the documentation:
Hub is the central point in the Selenium Grid that routes the JSON test commands to the nodes. It receives test requests from the client and routes them to the required nodes.
What is a hub in the Selenium grid?
Selenium Grid
Selenium Grid allows the execution of WebDriver scripts on remote machines (virtual or real) by routing commands sent by the client to remote browser instances. It aims to provide an easy way to run tests in parallel on multiple machines.
In simple words, Selenium Grid allows us to run tests in parallel on multiple machines, and to manage different browser versions and browser configurations centrally (instead of in each individual test).
Selenium Grid Hub
The Selenium Grid Hub is the central point where all your tests are sent. Each Selenium Grid consists of exactly one hub. The hub needs to be reachable from the respective clients (i.e. CI server, Developer machine etc.) The hub will connect one or more nodes that tests will be delegated to.
I want to run the selenium test cases in the remote machine.
These are the steps I have followed:
Steps I did in server machine:
I have downloaded selenium-server-standalone-3.9.1.jar + Chrome Driver & placed it in a folder and added it to $PATH environmental variable.
I have started selenium server using java -jar selenium-server-standalone-3.9.1.jar -role hub in the Terminal.
Steps I did in local machine:
I have installed selenium-webdriver & selenium-server-standalone-3.9.1.jar
I wrote a sample testcase using selenium webdriver.
I have started a node here using command java -jar selenium-server-standalone-3.9.1.ja-role node -hub http://172.24.111.70:4444/grid/register in the terminal. The node got connected to the hub.
I run the command node test.js in the terminal. I expect the chrome instance to open in the remote machine. But it is running in the local machine.
Screenshots:
Hub:(Remote)
Node:(Local)
Can you please explain me the mistake I have did here? Have I understood the concept wrong?
The web browser instance which will run your tests will get created on a node not the hub. The hub is how you can register a number of nodes so you can spread the load between different machines/nodes. From what I can tell, you have a hub on the remote machine which you connect a local node to.
What I think you want is to run the node on the remote machine also, registering to the hub on the same machine (you might have to change the IP address of the hub to localhost when registering the node).
So, the problem is you are wanting the tests to run on the Remote Machine, but they are running locally?
From the sounds of it you have done all the setup correctly, and the Hub/Nodes should be working fine. All you need to do, is instead of running the Node from your local machine, run it from the Remote Machine. You just need to think of the Hub as the Supervisor, who hands out work to the Nodes (their employees) to do. The Hub doesn't run any tests itself, it just sends the data to the Nodes and load balances between multiple Nodes.
We have a set up of 6 Remote Machines. Machine 1 has the Hub and a Node, and the other 5 have Nodes. In our project we are pointing towards the Hub, so when the tests run, they get sent there. The hub does the rest (depending on the nodecfg file and the settings you've got in there)
I am new to selenium. I am developed one application using a selenium web driver for doing some actions on the webpage. It's perfectly working when I am running locally i.e., it launches a browser in my machine. I deployed this application on a VM server so the script runs on the server(launched browser in VM Ware Machine), not on the client-side. Can anyone help me with how can I launch the browser on the client-side?
You have to create Hub and Nodes using selenium grid
You can refer this link to see step by step
http://www.seleniumeasy.com/selenium-tutorials/how-to-configure-selenium-grid
Your server will be hub and your client machine will be node
If you trigger from one machine, you can launch a browser on another machine using the selenium-grid concept
But both machines are under the same LAN.
Here you want to execute on the client machine. It is not possible, because your machine and client machine won't be under the same network
I have done my automation in Robotframework and I am using many libraries like Selenium2Library, Sikuli Library, HTTP Library, OS library and few more.
When I am running test on Selenium Grid, it invokes the browser on node and runs those steps which are from Selenium.
However, it does not run commands from Sikuli Library. Is selenium grid capable of running keywords from different libraries?
No, the selenium grid only works with selenium. The selenium grid is a server much like a web server. It listens for specific commands, and performs those commands. It will only respond to commands from selenium clients.
When using Sikuly in Robot Framework it is necessary to first setup the external sikuly server and then connect to it from Robot Framework. Typically this is a localhost connection, but connecting to an external host is also possible.
When using Selenium Grid, a connection is made to an anonymous node and thus the host to which the Sikuly server is runnning as well. Did a quick check in google and found that getting the hostname/IP of the running node from the hub is possible. Using the code example here I think it should be possible to create a direct connection to the Sikuly server.
I am looking for ways to set up like a central 'hub' for Selenium in my work, allowing anyone to access in within the company. For example, Tester A writes test scripts, the Person B can run without having to manually copy over the test scripts to their local workstation)
So far, I've only thought of installing Selenium in a VM which will then execute as per normal. But if I run Selenium Grid, it will run VMs within VM (?). My only concern with VMs is that it'd run slowly.
If anyone can think of a better solution or recommendation please do give me some advice. Thank you in advance.
One idea. You can create an infrastructure combining Jenkins/Selenium/Amazon.
The following is my solution from another post.
You can do it with a grid.
First of all you need to create a Selenium hub with an EC2 ubuntu 14.04 AMI without UI and link it as a jenkins slave to your Jenkins master. Or as directly a master. What you want. Only command line. Download Selenium Server standalone. (be careful on downloading the version. If you Download the Selenium3Beta, things could change). Here you can configure the HUB. You can also add the Selenium Hub as a service and configure to run automatically at server start. its important that you open the Selenium default port (or the one that you configured) so the nodes can connect to it. You can do that on the Amazon EC2 console when you have created your instance. You just need to add a security group with an inbound rule for TCP in the port you want for the IPs you want.
Then, you can create a Windows server 2012 instance server (for example, that's what I did), and do the same process. Download the same version for Selenium and the chromedriver (there is no need to download any firefoxdriver for Selenium versions before Selenium3). Generate a txt file and prepare the Selenium command to link to the HUB as a NODE. And convert it to *.bat in order to execute it. If you want to run the bat at start you can create a service with the task scheduler or use NSSM (https://nssm.cc/). Don't forget to add the rules to the security groups for this machine too!
Next, create the Jenkins server. You can use the Selenium Hub as the Jenkins master or as a slave.
Last step is configuring a job to be run in the Jenkins-Selenium machine. This job needs to be linked to your code repository (git, mercurial...) Using the parametrized build plugion for jenkins you can tell that job to pull the revision you want (where every developer can pull the revision with the new changes and new tests) and run the Selenium tests in that build with the current breanch/revision and against one unique selenium. You can use ANT or Maven to run the Selenium tests in Jenkins.
May be it's complicated to understand because there are so many concepts here but it's robust and it works fine!
If you have doubts, tell me!
If Internet Explorer is not one of the browsers on which you must run your automation tests, I would recommend that you consider docker selenium.
Selenium is providing pre-configured docker images for both Selenium Hub and Node ( refer here for more information ). For making use of docker selenium all you need to do is find a machine (preferably unix machine), install docker on it by following instructions detailed here and then start the hub and node by starting off those containers. In the case of docker you can literally transform a VM (or) a physical machine into a VM farm and yet not have to worry about slowness etc., because I believe docker is optimised for these and it runs your VM as a process.
Resorting to using Amazon cloud for running your selenium nodes is all fine, but if you have corporate policies that prevent in-coming traffic from the internet into your intranet region, then I am not sure how far Amazon cloud would be useful.
Also remember that Jenkins is not something that is absolutely required but is more of a good to have part in the setup because it would let anyone run their tests from a web UI. This will however require that all your tests are checked-in and made available in a central version control system in your organization.
PS : The reason why called out Internet Explorer as an exception is because IE runs only on windows and there are no docker images (yet) for windows. All the docker images are UNIX based images.