On my linux box somewhere in the United States, it's running Selenium Grid 2.
Currently 3 people will be regularly running parallel tests, but there's potential for more people to join and running more parallel tests....
now they are in other parts of the world, they need to submit an xml file which contains the test data, and the server needs to parse this and figure out the rules.
How can the client invoke a test to run on the remote server? via HTTP POSTing the xml file to the url in which the grid is running on?
Is it cheaper to just rent out a fast linux server and then buy more as number of parallel tests increase?
Or should I right off the bat, hook it up to Amazon ec2? If there are parallel tests on an ajax heavy web applications running 24/7, would it be cheaper to go with the single dedicated box or amazon? google app engine (no plugins for grid?)?
I am not sure I understood the xml submitting part in your question. However, I can tell you an example which will help to you understand how to submit the tests to grid.
Three people, PersonA, PersonB and PersonC are creating selenium tests in their local machine. They currently run the test using an ANT build (or something similar) against the selenium server jar which is in their local machine. In their code they would be having a line of code which tells which selenium instance should be used to run this test. This will be mostly like
new DefaultSelenium("localhost",port,browsername,URL)
Now these people want to move to selenium grid (1 or 2). Here is what they will have to do to use the grid
All they have to do is change the command
new DefaultSelenium("localhost",port,browsername,URL)
to
new DefaultSelenium("hubIPAddress",portInWhichHubWasStarted,browsername,URL)
Note:- browserName - Make sure there is a remote node registered in Hub for the same browserName.
Now all the commands will be sent to Selenium Hub and Hub would execute the commands using the remote nodes.
Hope this helps. Please post if you have any questions.
Related
Hi all I am using TestNG framework for selenium webdriver scripts. I run them on Jenkins on two slaves one being windows the other being linux. I have close to 100 test cases and they take 2hrs 40 mins on each machine. I would want to speed up the execution time. will selenium grid be helpful in this case?
No. Selenium grid would not be the solution. Selenium grid can multiply the same action, not taking different actions in parallel.
You should look for the opportunities in test parallelization.
Selenium grid is designed to allow you to run test in parallel
The page says:
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).
However it's not as easy as installing it and connecting up.
You'll need to ensure the rest of your framework and tests are capable of parallel execution. Most important part is to watch out for your test data e.g. if multiple tests rely on the same data source and they try and update it at the same time you'll get flaky results.
You're also capable of running tests in parallel on a local machine without selenium grid. If i were you i'd start with this first.
Typically most machines have the resources to run more than one browser - get it running locally before you go to far down the grid rabbit hole.
Here's a link for testng
Also worth a review is zalenium - a docker image that contains a grid + auto scaling nodes allowing easier browser control on a single machine.
I was asked a question :
Assume I have 4 machines and I need to execute a script in all the machines across all the browsers. How will I achieve that.
I told him the concept of Selenium Grid, where in we could set up a machine which acts like a hub, configure 3 more machines which would act like a node.
Using Desired Capabilities among others we could choose a browser type and version type in that and write a script.
But he asked me two things :
IN all the node machines how do you configure the Windows username and Password if the machine is locked. Can you write windows Authentication in the script.
Can I achieve testing different browser versions of same browser type in a single node?
Can I pass as a the browser type and browser version as a parameter
from hub to the node?
Can someone throw some light on these as I was unable to answer. Thanks.
Question 1: Is it really necessary for the machine to be unlocked for the test to start? The selenium node is a background process that listens for commands, and executes them on the browser, so I do not think this is necessary. If it is necessary due to your specific windows settings however, then no, you cannot do this from the selenium script obviously.
Question 2: Yes, you can test different browser versions of the same type on the same node. You can pass the browser name and version to the node. However, keep in mind that the node cannot know the location of the different browser versions, so you will also have to supply the path to the browser executable for your requested version
We have are planning to design a system where we are planning to invoke the Selenium test that is present in a remote machine with url for testing. The selenium program should open 3 browsers for example IE, FF and Chrome and open the page and take a screenshot of it. Later These screenshots should be sent from this machine to the java application.
Is it possible to achieve this functionality ? If so could you please guide me on how to do this ?
Yes, you need to start a Selenium Grid/Node server on the remote machine that is configured to run all 3 browser types. That configuration isn't easy but it involves launching the grid from a .json config file. Then, your local program needs to just run the 3 tests either in 3 simultaneous threads, or one at a time using typical Selenium code.
Each test needs to define a Selenium Augmenter to get screenshots. There are lots of examples on Google.
I've been working on a webdriver framework for a while now, I guess it is
keyword driven now. We would like for there to be a central place for users to
store tests, preferably on a wiki, but then when they are run they would open up
the browser on users local machine.
I originally started working using Fitnesse, which works great for storing the
tests however when we hosted it on a server when a user tries to run a test it
opens the browser on the server which the user can't view. Does anyone know a
way that I could force Fitnesse to open the users local browser or display the
browser to the user? Or do you know another framework/way to store tests in a
central place but run them in local.
I've been looking at sending through the local users ip through a fixture to start up the initial framework, I was hoping that fitnesse would already know the ip.
Thanks,
James
You can either find a framework that does what you want, or the bare minimum would be to create a thin wrapper that copies the test dll's and executeable to a machine and executes psexec to execute the tests on the remote machine. You could probably write the entire thing in maybe 20 lines of code.
Appologies if this is a bit of a noob queston.
I have Selenium RC setup on a server and a test hub application.
When a user selects to run a test from the test hub, which browsers will the test be run on. Those on the server or those on the users machine?
Basically I want my test hub app to serve 2 purposes, for a user to trigger and watch a test to be run and 2ndly for the underlying tests to be accessible so they can be run automatically by the build server using Cruise Control.
I personally wouldnt worry about running the tests on the persons PC and go for the option of video recording the tests while they run so that the person can have a look at the video once the test is complete.
I would set up a Selenium Grid that when you trigger a test it will then push the test to the grid and then record them. I did a blog post in May that describes how to set up video recording on Linux.
If you don't have the time or hardware to set this all up you can always trigger the tests to run on Sauce Labs and they will record the video for you automatically so that people can see them